CN118659834B - On-chip coherent light detection architecture and detection method thereof - Google Patents
On-chip coherent light detection architecture and detection method thereof Download PDFInfo
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- H—ELECTRICITY
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- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/61—Coherent receivers
- H04B10/615—Arrangements affecting the optical part of the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/61—Coherent receivers
- H04B10/616—Details of the electronic signal processing in coherent optical receivers
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Abstract
The embodiment of the invention provides an on-chip coherent light detection architecture and a detection method thereof, which relate to the technical field of computer systems and microwave processing and comprise a plurality of paths of light input circuits, beam combiners and photoelectric detectors, wherein the paths of light input circuits are arranged on a substrate and are used for inputting coherent light signals, the light signals of different paths of light input circuits have different time sequences, the input ends of the beam combiners are connected with the output ends of the paths of light input circuits and are used for converging the plurality of paths of coherent light signals into the photoelectric detectors, and the input ends of the photoelectric detectors are connected with the output ends of the beam combiners and are used for adding the converged paths of coherent light signals based on the time sequences and outputting operation matrix data. The embodiment of the invention can detect multiple paths of coherent light and directly add the light paths in the light domain, thereby realizing parallel calculation of photon operation and reducing the power consumption of equipment.
Description
Technical Field
The invention relates to the technical field of computer systems and microwave processing, in particular to an on-chip coherent light detection architecture and a detection method thereof.
Background
In the field of optical communication, coherent light transmission and detection are mainly used for improving detection sensitivity and increasing relay distance, and the current coherent light transmission and detection mode is to arrange a photoelectric detector in each optical channel, so that the influence of interference of optical signals of different channels on detection results is avoided. Or serializing the photon signals, transmitting the photon signals to a photoelectric detector to obtain optical power values at different moments, and adding the optical power values in an electric domain to realize a convolution result of the convolution neural network. The current detection mode can cause the increase of chip layout and loss.
Disclosure of Invention
In view of the above, embodiments of the present invention have been made to provide an on-chip coherent light detection architecture, a detection method of an on-chip coherent light detection architecture, and a server that overcome or at least partially solve the above problems.
In order to solve the problems, the embodiment of the invention discloses an on-chip coherent light detection architecture which comprises a multipath light input circuit, a beam combiner and a photoelectric detector which are arranged on a substrate,
The multi-path optical input circuit is used for inputting coherent optical signals, and the optical signals of different paths of optical input circuits have different time sequences;
The input end of the beam combiner is connected with the output end of the multipath optical input circuit and is used for collecting and inputting multipath coherent optical signals into the photoelectric detector;
The input end of the photoelectric detector is connected with the output end of the beam combiner and is used for adding the collected multipath coherent light signals based on time sequence and outputting operation matrix data.
Optionally, each of the multiple optical input circuits includes:
a straight waveguide transmission line for inputting the coherent optical signal;
an optically adjustable delay line connected to the straight waveguide transmission line for adjusting the timing of the coherent optical signal;
And the mode converter is connected with the optical adjustable delay line and is used for carrying out mode conversion on the coherent optical signal after the time sequence adjustment so as to input the beam combiner.
Optionally, the mode converter includes:
And the intrinsic mode converter is used for converting the fundamental mode of the coherent optical signal after the time sequence adjustment into a higher-order mode.
Optionally, the mode converter includes:
And the electromagnetic converter is used for converting the coherent optical signal after the time sequence adjustment from a transverse electric mode to a transverse magnetic mode.
Optionally, the optically adjustable delay lines are arranged in a continuous circular pattern, and the number of circular rings is positively correlated with the delay of the time sequence.
Optionally, the diameter of the ring is greater than 50 microns.
Optionally, the optically adjustable delay line is arranged in a spiral pattern, the number of turns of the spiral being positively correlated with the delay of the timing sequence.
Optionally, the optical tunable delay line has a delay of 1 to 100 picoseconds.
Optionally, the time sequence difference between the coherent optical signals input by each path of optical input circuit is 10-200 picoseconds.
Optionally, the frequency of the coherent optical signal input by each path of optical input circuit is 5-100 baud rate.
Optionally, the spacing between optically adjustable delay lines of different optical input circuits is distributed.
Optionally, the spacing between optically tunable delay lines of different optical input circuits is 50-100 microns.
Optionally, the spacing between the straight waveguide transmission line of one of the different optical input circuits and the optically adjustable delay line of the adjacent optical input circuit is distributed.
Optionally, a distance between a straight waveguide transmission line of one of the different optical input circuits and an optically tunable delay line of an adjacent optical input circuit is greater than 5 microns.
An on-chip coherent light detection architecture-based detection method, wherein the on-chip coherent light detection architecture is the on-chip coherent light detection architecture, and the method comprises the following steps:
when each path of optical input circuit in the multipath optical input circuits reaches a corresponding time sequence, processing original input data and a preset matrix to generate a coherent optical signal;
and adding the coherent light signals to obtain operation matrix data.
Optionally, when each optical input circuit in the multiple optical input circuits reaches a corresponding time sequence, the step of processing the original input data and the preset matrix to generate the coherent optical signal includes:
When each optical input circuit in the multipath optical input circuits reaches a corresponding time sequence, multiplying the original input data with a preset matrix to generate a coherent optical signal.
Optionally, the step of adding the coherent optical signals to obtain operation matrix data includes:
Arranging the coherent optical signals;
And adding the coherent light signals based on the arranged sequence to obtain operation matrix data.
Optionally, the step of arranging the coherent optical signals includes:
Determining a processing event;
The coherent optical signals are arranged based on the sequence of processing events.
Optionally, the step of adding the coherent light signals based on the arranged order to obtain operation matrix data includes:
Determining a target position element in the coherent light signal correspondence matrix;
And adding the target position elements based on the arranged sequence to obtain operation matrix data.
A server comprising an on-chip coherent light detection architecture as described above.
The embodiment of the invention has the following advantages:
The embodiment of the invention comprises a multi-path optical input circuit, a beam combiner and a photoelectric detector which are arranged on a substrate, wherein the multi-path optical input circuit is used for inputting coherent optical signals, optical signals of different paths of optical input circuits have different time sequences, the input end of the beam combiner is connected with the output end of the multi-path optical input circuit and is used for converging and inputting the multi-path coherent optical signals into the photoelectric detector, and the input end of the photoelectric detector is connected with the output end of the beam combiner and is used for adding the converged multi-path coherent optical signals based on the time sequences and outputting operation matrix data. The method comprises the steps of generating coherent optical signals in parallel through a plurality of paths of optical input circuits, outputting coherent optical signals with different time sequences to the optical input circuits with different paths, adding based on the time sequences, outputting operation matrix data to realize simultaneous detection and addition of the plurality of paths of coherent light, adding in an optical domain, and carrying out serialization processing on the data without carrying out serialization processing on the data.
Drawings
FIG. 1 is a schematic diagram of an on-chip coherent light detection architecture according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another embodiment of an on-chip coherent light detection architecture according to the present invention;
FIG. 3 is a schematic diagram of an on-chip coherent light detection architecture according to another embodiment of the present invention;
FIG. 4 is a flow chart of steps of an embodiment of a detection method based on an on-chip coherent light detection architecture according to the present invention;
fig. 5 is a block diagram of a server embodiment of the present invention.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
One of the core concepts of the embodiment of the invention is that the orthogonal characteristics among different eigenmodes are utilized to complete the multi-channel coherent light domain addition and single-channel detection. When each optical input circuit inputs a coherent optical signal, the optical signal after the multiplication operation of the original data and the convolution kernel matrix (or other matrixes) is shown, the optical signal at this time carries input data (including but not limited to images to be recognized, voice data and the like), and the optical signals of a plurality of channels are rearranged according to the sequence and then added to obtain a matrix calculation result finally.
Referring to fig. 1, there is shown a schematic structural diagram of an embodiment of an on-chip coherent light detection architecture of the present invention, which may specifically include a multi-path light input circuit 100 disposed on a substrate, a beam combiner 200 and a photodetector 300,
The multi-path optical input circuit 100 is used for inputting coherent optical signals, and the optical signals of different paths of optical input circuits 100 have different time sequences;
The input end of the beam combiner 200 is connected with the output end of the multi-path optical input circuit 100, and is used for collecting and inputting multi-path coherent optical signals into the photodetector 300;
The input end of the photodetector 300 is connected to the output end of the beam combiner 200, and is used for adding the collected multipath coherent light signals based on time sequence and outputting operation matrix data.
In the implementation of the present invention, the multiplexing optical input circuit 100, the combiner 200, and the photodetector 300 form an on-chip coherent optical detection architecture. The multiplexing optical input circuit 100, the combiner 200, and the photodetector 300 are all disposed on a substrate. The substrate may be a silicon-on-insulator substrate. The insulating silicon substrate is provided with an ultrathin insulating layer (such as SiO 2) on a silicon wafer, and a thin silicon layer on the insulating layer. This structure separates the active silicon layer from the silicon layer of the substrate, forming a unique sandwich structure. The insulating layer is usually made of SiO2 or other insulating materials, so that the insulating layer has an isolation function and reduces parasitic effects. The top silicon layer is used to fabricate the functional layers of the chip, and its quality directly affects the performance of the device. The underlying silicon substrate provides mechanical support and heat dissipation. The multiplexing optical input circuit 100, the combiner 200, and the photodetector 300 may be disposed on a top silicon layer.
The multiplexed optical input circuit 100 may be used to input a coherent optical signal to provide an initial optical signal for an on-chip coherent optical detection architecture. The optical polarization state of the coherent optical signal may be a transverse electric state or a transverse magnetic state, and embodiments of the present invention are not particularly limited. In an alternative embodiment of the invention, a coherent optical signal in the transverse electrical state may be selected. The transverse electric state is a transverse electric field (TE) state, which means that no electric field component exists in the propagation direction of electromagnetic waves, but a wave with a magnetic field component exists, and the electric field is mainly located in a waveguide plane. In particular, the electric field vector of the TE wave lies entirely on a cross section perpendicular to the propagation direction, whereas the magnetic field vector may contain components parallel to the propagation direction. The transverse magnetic state is a transverse magnetic field (TM) state, and means a wave in which there is no magnetic field component but there is an electric field component in the propagation direction of an electromagnetic wave. In contrast to TE waves, the magnetic field vector of TM waves lies entirely in a cross section perpendicular to the direction of propagation, i.e. the magnetic field lies mainly in the plane of the waveguide, whereas the electric field vector may contain components parallel to the direction of propagation. Each mode has unique characteristics that affect the waveguide design, such as polarization sensitivity and modal dispersion. Wherein the optical signals of different optical input circuits 100 have different timings.
The input end of the beam combiner 200 is connected with the output end of the multi-path optical input circuit 100, that is, the coherent optical signals of each path of optical input circuit 100 are transmitted to the beam combiner 200, and the multi-path coherent optical signals are collected by the beam combiner 200 and input to the photodetector 300, so that the photodetector 300 can detect. The principle of operation of the beam combiner 200 is based mainly on the transmission and coupling effects of light in the waveguide. When the light beam enters the optical waveguide, the light wave is confined to the interior of the waveguide for transmission due to the confinement of the waveguide. The combination or distribution of the light beams can be realized by designing a proper waveguide structure and a proper coupling mode. Specifically, the combiner 200 typically employs a multi-layer film structure, each layer of film having a different refractive index and thickness. When a light beam is transmitted in the waveguide, reflection and refraction occur at the film interface, thereby changing the propagation direction of the light beam. By adjusting the refractive index and thickness of the film, the coupling efficiency and transmission characteristics of the light beams can be controlled, and the light beams can be combined or distributed. The beam combiner 200 can realize efficient combination of light beams and reduce loss and waste of light energy, and the beam combiner 200 can adopt a solid structure, has higher stability and reliability, and is suitable for various severe environments. The beam combiner 200 can be designed and customized according to actual requirements, so as to meet the requirements of different application scenes. The beam combiner 200 may be integrated with other optoelectronic components to form a more functional optoelectronic system.
The photodetector 300 is a device capable of converting an optical signal into an electrical signal. It achieves conversion of optical signals into electrical signals by utilizing photoelectric effects, including external and internal photoelectric effects. The photodetector 300 is connected with the beam combiner 200, and sums the collected and combined multiple coherent optical signals based on time sequence, and calculates each coherent optical signal to obtain operation matrix data, thereby realizing the addition of the coherent optical signals realized by a single photodetector 300 in the optical domain. The principle of operation of the photodetector 300 is based primarily on the photoelectric effect. Specifically, when light is irradiated onto the sensitive material of the photodetector 300, electrons inside the material absorb photon energy and undergo a corresponding physical change, thereby generating an electrical signal. The magnitude of such an electrical signal is related to the intensity, wavelength, etc. of the incident light. The external photoelectric effect, that is, the photoemission effect, refers to the phenomenon that electrons in a substance get enough energy to escape from the surface of the substance to form photoelectrons when light irradiates the surface of the substance. Intrinsic photoelectric effects including photoconductive effects and photovoltaic effects. The photoconductive effect refers to the fact that electrons illuminated on a semiconductor material absorb photon energy and then transition from a valence band to a conduction band, thereby increasing the conductivity of the material. The photovoltaic effect is that light irradiates on the PN junction of the semiconductor material, and the electric charge distribution at two sides of the PN junction is changed due to the action of photons, so that electromotive force is generated. The performance parameters of the photodetector 300 may be designed according to practical requirements, which are not particularly limited in the embodiments of the present invention. Performance parameters of photodetector 300 include, but are not limited to, quantum efficiency, the average number of electrons emitted per incident photon of light, reflecting the efficiency of utilization of photons by photodetector 300. In response, the ratio of the output signal of the photodetector 300 to the input optical power reflects the photoelectric conversion efficiency of the photodetector 300. The spectral responsivity, the responsivity of the photodetector 300 at a particular wavelength, reflects the sensitivity of the photodetector 300 to light of different wavelengths. The response time, the time required for the photodetector 300 from the time of receiving the optical signal to the time of generating the stable electrical signal, reflects the response speed of the photodetector 300. The dark current, the current through the photodetector 300 without the light signal or background radiation, reflects the noise level of the photodetector 300.
Specifically, each optical input circuit 100 of the multiple optical input circuits 100 includes:
a straight waveguide transmission line 110 for inputting the coherent optical signal;
An optically adjustable delay line 120 connected to the straight waveguide transmission line 110 for adjusting the timing of the coherent optical signal;
the mode converter 130 is connected to the optically adjustable delay line 120, and is configured to perform mode conversion on the coherent optical signal after the time sequence adjustment, so as to input the beam combiner 200.
In an embodiment of the present invention, each optical input circuit 100 includes a straight waveguide transmission line 110, an optically tunable delay line 120, and a mode converter 130. Wherein the straight waveguide transmission line 110 is used to transfer an incoming coherent optical signal. The straight waveguide transmission line 110 is a waveguide of a simple structure, and is characterized by being directly connected without changing the transmission direction of signals. Its length can be customized according to the actual application scenario. The main function of the straight waveguide is to efficiently transmit an optical signal from one end to the other as a transmission line for the optical signal. The straight waveguide is typically made of metal (e.g., copper, aluminum) or a special material, and its inner wall may be subjected to conductive oxidation, gold plating, silver plating, etc. to improve electrical conductivity and corrosion resistance. The straight waveguide has various cross-sectional shapes including rectangular, circular, square, etc. Depending on the shape and use, the straight waveguide may be classified into various types such as a rectangular waveguide, a circular waveguide, a single-ridge waveguide, a double-ridge waveguide, and the like. The principle of operation of a straight waveguide is based on the transmission characteristics of electromagnetic waves in a metal waveguide. As an electromagnetic wave propagates in a waveguide, it is reflected back and forth between the walls of the waveguide and proceeds along the axial direction of the waveguide.
The optically adjustable delay line 120 is connected to the straight waveguide transmission line 110, and adjusts the timing of the input coherent optical signals, so that the timing of the coherent optical signals is different between different optical input circuits 100. An optically adjustable delay line 120 (Optical Tunable DELAY LINE, OTDL) is an Optical device for introducing an adjustable time delay to the light beam. The principle of operation of the optically tunable delay line 120 generally involves the propagation and reflection of an optical signal in a particular optical structure. Adjustment of the propagation time of an optical signal can be achieved by varying certain parameters in the optical structure, such as refractive index, path length, etc. Specifically, the optical signal enters the delay line from the input end, undergoes a series of optical processes (e.g., reflection, refraction, interference, etc.), and finally achieves the desired time delay at the output end. The optically tunable delay line 120 may be a waveguide-type delay line, so that the time delay adjustment may be implemented integrally on an optical waveguide or a photonic chip. The waveguide type delay line generally has smaller volume and higher integration level, and is suitable for application scenes needing high integration.
The mode converter 130 is connected to the optical tunable delay line 120, and performs mode conversion on the coherent optical signal after the time sequence adjustment, so as to improve the transmission energy of the coherent optical signal, ensure that the coherent optical signal can be transmitted to the optical combiner 200, and further enable the optical detector 300 to obtain the coherent optical signal.
In an alternative embodiment of the present invention, the mode converter 130 includes an intrinsic mode converter 131 for converting the fundamental mode of the coherent optical signal after the time-series adjustment into a higher-order mode.
In the embodiment of the present invention, the mode converter 130 may be an intrinsic mode converter 131, and the fundamental mode of the coherent optical signal after the time sequence adjustment is converted into the higher-order mode by the intrinsic mode converter 131, so as to adjust the transmission form of the coherent optical signal.
In an alternative embodiment of the present invention, the mode converter 130 includes:
an electromagnetic converter 132 for converting the coherent optical signal after the adjustment from the transverse electric mode to the transverse magnetic mode.
In an embodiment of the present invention, the mode converter 130 may be an electromagnetic converter 132, i.e., a TE-TM converter, for converting a TE (transverse electric) mode of a signal into a TM (transverse magnetic) mode. Namely, the coherent optical signal after the time sequence adjustment is converted from a transverse electric mode to a transverse magnetic mode.
For example, referring to fig. 2, at a convolution kernel order of 2, the polarization state conversion orthogonal to each other TE and TM is simpler, and a TE-TM converter may be used.
In an alternative embodiment of the present invention, the optically adjustable delay lines 120 are arranged in a continuous circular pattern, the number of which is positively correlated with the delay of the timing sequence.
In the embodiment of the present invention, the optically adjustable delay lines 120 are arranged in a continuous circular pattern, and different optically adjustable delay lines 120 set different delays by setting different numbers of circular rings in the continuous circular pattern. Wherein the number of circles is positively correlated with the delay of the timing, as shown in fig. 1, the more circles the delay of the timing is greater.
Further, the diameter of the ring is greater than 50 microns. The optically adjustable delay line 120 has a delay of 1-100 picoseconds. The timing difference between the coherent optical signals input by each optical input circuit 100 is 10-200 picoseconds. The frequency of the coherent optical signal input by each optical input circuit 100 is 5-100 baud rate.
Still further, the spacing between optically adjustable delay lines 120 of different optical input circuits 100 is distributed. The optically adjustable delay lines 120 between each optical input circuit 100 are distributed at a certain interval, so as to avoid signal interference. Specifically, the spacing between optically tunable delay lines 120 of different optical input circuits 100 is 50-100 microns. The d2 length as in fig. 1 is 50-100 microns.
Still further, the spacing between the straight waveguide transmission line 110 of one optical input circuit 100 and the optically tunable delay line 120 of an adjacent optical input circuit 100 of the different optical input circuits 100 is distributed.
For the straight waveguide transmission line 110 of any optical input circuit 100, it is also distributed with a certain distance from the optical tunable delay line 120 of the adjacent optical input circuit 100, so as to avoid signal interference. Specifically, the spacing between the straight waveguide transmission line 110 of one optical input circuit 100 of the different optical input circuits 100 and the optically tunable delay line 120 of the adjacent optical input circuit 100 is greater than 5 microns. The d1 length as in fig. 1 is greater than 5 microns.
In an alternative embodiment of the invention, the optically adjustable delay line 120 is arranged in a spiral pattern. The number of turns of the spiral is positively correlated with the delay of the timing sequence.
In order to avoid the optical tunable delay line from being too large, the optical tunable delay line can be arranged in a spiral mode. The arrangement may be in a spiral pattern as shown in fig. 3. The number of turns of the spiral is positively correlated with the delay of the time sequence, i.e. the more turns of the spiral, the greater the delay, whereas the fewer turns of the spiral, the smaller the delay.
The embodiment of the invention comprises a multi-path optical input circuit, a beam combiner and a photoelectric detector which are arranged on a substrate, wherein the multi-path optical input circuit is used for inputting coherent optical signals, optical signals of different paths of optical input circuits have different time sequences, the input end of the beam combiner is connected with the output end of the multi-path optical input circuit and is used for converging and inputting the multi-path coherent optical signals into the photoelectric detector, and the input end of the photoelectric detector is connected with the output end of the beam combiner and is used for adding the converged multi-path coherent optical signals based on the time sequences and outputting operation matrix data. The method comprises the steps of generating coherent optical signals in parallel through a plurality of paths of optical input circuits, outputting coherent optical signals with different time sequences to the optical input circuits with different paths, adding based on the time sequences, outputting operation matrix data to realize simultaneous detection and addition of the plurality of paths of coherent light, adding in an optical domain, and carrying out serialization processing on the data without carrying out serialization processing on the data.
Referring to fig. 4, a flowchart illustrating steps of an embodiment of a detection method based on an on-chip coherent light detection architecture according to the present invention is shown. The detection method based on the on-chip coherent light detection architecture specifically comprises the following steps:
step 401, when each optical input circuit in the multiple paths of optical input circuits reaches a corresponding time sequence, processing original input data and a preset matrix to generate a coherent optical signal;
when the data calculation of the neural network and the like is carried out, the original input data can be input into each path of optical input circuits in the multipath optical input circuits, and each path of optical input circuit in the multipath optical input circuits is matched with the corresponding time sequence at the current moment, namely, when the corresponding time sequence is reached, the original input data can be processed with a preset matrix. A coherent optical signal is generated to input the coherent optical signal to an on-chip coherent optical detection architecture.
The preset matrix is related to the type of data calculation, and the embodiment of the invention is not limited. For example, when performing the calculation of the convolutional neural network, the preset matrix is based on the convolutional matrix in the convolutional neural network.
The step of generating the coherent optical signal includes multiplying the original input data with a preset matrix to generate the coherent optical signal when each optical input circuit in the multi-path optical input circuit reaches a corresponding time sequence.
When each optical input circuit in the multipath optical input circuits reaches a corresponding time sequence, multiplying the original input data input by the optical input circuits by a preset matrix to generate a coherent optical signal.
And step 402, adding the coherent light signals to obtain operation matrix data.
After the coherent optical signals are obtained, the coherent optical signals can be added to obtain operation matrix data.
In an optional embodiment of the invention, the step of adding the coherent optical signals to obtain operation matrix data includes:
Step S4021, arranging the coherent optical signals;
the coherent optical signals output by each optical input circuit may be first arranged in a specific order, so that parallel data may be fused.
Specifically, the step of arranging the coherent optical signals comprises determining processing events and arranging the coherent optical signals based on the sequence of the processing events.
The current processing event may first be determined based on the content of the calculation or the type of instruction entered. Based on the processing event requirements for data processing, a sequence of data processing is included, and the coherent optical signals may be arranged based on the sequence of processing events.
Step S4022, adding the coherent light signals based on the arranged order to obtain operation matrix data.
And adding the coherent light signals of each path of optical input circuit according to the arranged sequence until the coherent light signals of all the optical input circuits are added to obtain operation matrix data.
The method comprises the steps of determining target position elements in a corresponding matrix of the coherent light signals, and adding the target position elements based on the arranged sequence to obtain operation matrix data.
In the processing process, only the needed partial data is needed to be processed instead of the whole matrix to calculate the addition of all the data, so that the data processing can be reduced, and the target position element in the corresponding matrix of the coherent optical signal can be determined, wherein the target position element is the partial data to be processed. And adding the target position elements based on the arranged sequence to obtain operation matrix data. The data which is not calculated can be discarded, so that the data processing amount is further reduced.
Specifically, the on-chip coherent light detection architecture comprises a multipath light input circuit, a beam combiner and a photoelectric detector which are arranged on a substrate,
The multi-path optical input circuit is used for inputting coherent optical signals, and the optical signals of different paths of optical input circuits have different time sequences;
The input end of the beam combiner is connected with the output end of the multipath optical input circuit and is used for collecting and inputting multipath coherent optical signals into the photoelectric detector;
The input end of the photoelectric detector is connected with the output end of the beam combiner and is used for adding the collected multipath coherent light signals based on time sequence and outputting operation matrix data.
Optionally, each of the multiple optical input circuits includes:
a straight waveguide transmission line for inputting the coherent optical signal;
an optically adjustable delay line connected to the straight waveguide transmission line for adjusting the timing of the coherent optical signal;
And the mode converter is connected with the optical adjustable delay line and is used for carrying out mode conversion on the coherent optical signal after the time sequence adjustment so as to input the beam combiner.
Optionally, the mode converter includes:
And the intrinsic mode converter is used for converting the fundamental mode of the coherent optical signal after the time sequence adjustment into a higher-order mode.
Optionally, the mode converter includes:
And the electromagnetic converter is used for converting the coherent optical signal after the time sequence adjustment from a transverse electric mode to a transverse magnetic mode.
Optionally, the optically adjustable delay lines are arranged in a continuous circular pattern, and the number of circular rings is positively correlated with the delay of the time sequence.
Optionally, the diameter of the ring is greater than 50 microns.
Optionally, the optically adjustable delay line is arranged in a spiral pattern, the number of turns of the spiral being positively correlated with the delay of the timing sequence.
Optionally, the optical tunable delay line has a delay of 1 to 100 picoseconds.
Optionally, the time sequence difference between the coherent optical signals input by each path of optical input circuit is 10-200 picoseconds.
Optionally, the frequency of the coherent optical signal input by each path of optical input circuit is 5-100 baud rate.
Optionally, the spacing between optically adjustable delay lines of different optical input circuits is distributed.
Optionally, the spacing between optically tunable delay lines of different optical input circuits is 50-100 microns.
Optionally, the spacing between the straight waveguide transmission line of one of the different optical input circuits and the optically adjustable delay line of the adjacent optical input circuit is distributed.
Optionally, a distance between a straight waveguide transmission line of one of the different optical input circuits and an optically tunable delay line of an adjacent optical input circuit is greater than 5 microns.
An on-chip coherent light detection architecture-based detection method, wherein the on-chip coherent light detection architecture is the on-chip coherent light detection architecture, and the method comprises the following steps:
when each path of optical input circuit in the multipath optical input circuits reaches a corresponding time sequence, processing original input data and a preset matrix to generate a coherent optical signal;
and adding the coherent light signals to obtain operation matrix data.
Optionally, when each optical input circuit in the multiple optical input circuits reaches a corresponding time sequence, the step of processing the original input data and the preset matrix to generate the coherent optical signal includes:
When each optical input circuit in the multipath optical input circuits reaches a corresponding time sequence, multiplying the original input data with a preset matrix to generate a coherent optical signal.
Optionally, the step of adding the coherent optical signals to obtain operation matrix data includes:
Arranging the coherent optical signals;
And adding the coherent light signals based on the arranged sequence to obtain operation matrix data.
Optionally, the step of arranging the coherent optical signals includes:
Determining a processing event;
The coherent optical signals are arranged based on the sequence of processing events.
Optionally, the step of adding the coherent light signals based on the arranged order to obtain operation matrix data includes:
Determining a target position element in the coherent light signal correspondence matrix;
And adding the target position elements based on the arranged sequence to obtain operation matrix data.
The embodiment of the invention comprises a multi-path optical input circuit, a beam combiner and a photoelectric detector which are arranged on a substrate, wherein the multi-path optical input circuit is used for inputting coherent optical signals, optical signals of different paths of optical input circuits have different time sequences, the input end of the beam combiner is connected with the output end of the multi-path optical input circuit and is used for converging and inputting the multi-path coherent optical signals into the photoelectric detector, and the input end of the photoelectric detector is connected with the output end of the beam combiner and is used for adding the converged multi-path coherent optical signals based on the time sequences and outputting operation matrix data. The method comprises the steps of generating coherent optical signals in parallel through a plurality of paths of optical input circuits, outputting coherent optical signals with different time sequences to the optical input circuits with different paths, adding based on the time sequences, outputting operation matrix data to realize simultaneous detection and addition of the plurality of paths of coherent light, adding in an optical domain, and carrying out serialization processing on the data without carrying out serialization processing on the data.
It should be noted that, for simplicity of description, the method embodiments are shown as a series of acts, but it should be understood by those skilled in the art that the embodiments are not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred embodiments, and that the acts are not necessarily required by the embodiments of the invention.
The embodiment of the invention also discloses a chip which comprises the on-chip coherent light detection architecture.
The chip can be connected into a microwave processing and calculating unit to perform coherent light detection through an on-chip coherent light detection framework so as to realize data processing.
The on-chip coherent light detection framework comprises a multipath light input circuit, a beam combiner and a photoelectric detector which are arranged on a substrate,
The multi-path optical input circuit is used for inputting coherent optical signals, and the optical signals of different paths of optical input circuits have different time sequences;
The input end of the beam combiner is connected with the output end of the multipath optical input circuit and is used for collecting and inputting multipath coherent optical signals into the photoelectric detector;
The input end of the photoelectric detector is connected with the output end of the beam combiner and is used for adding the collected multipath coherent light signals based on time sequence and outputting operation matrix data.
Optionally, each of the multiple optical input circuits includes:
a straight waveguide transmission line for inputting the coherent optical signal;
an optically adjustable delay line connected to the straight waveguide transmission line for adjusting the timing of the coherent optical signal;
And the mode converter is connected with the optical adjustable delay line and is used for carrying out mode conversion on the coherent optical signal after the time sequence adjustment so as to input the beam combiner.
Optionally, the mode converter includes:
And the intrinsic mode converter is used for converting the fundamental mode of the coherent optical signal after the time sequence adjustment into a higher-order mode.
Optionally, the mode converter includes:
And the electromagnetic converter is used for converting the coherent optical signal after the time sequence adjustment from a transverse electric mode to a transverse magnetic mode.
Optionally, the optically adjustable delay lines are arranged in a continuous circular pattern, and the number of circular rings is positively correlated with the delay of the time sequence.
Optionally, the diameter of the ring is greater than 50 microns.
Optionally, the optically adjustable delay line is arranged in a spiral pattern, the number of turns of the spiral being positively correlated with the delay of the timing sequence.
Optionally, the optical tunable delay line has a delay of 1 to 100 picoseconds.
Optionally, the time sequence difference between the coherent optical signals input by each path of optical input circuit is 10-200 picoseconds.
Optionally, the frequency of the coherent optical signal input by each path of optical input circuit is 5-100 baud rate.
Optionally, the spacing between optically adjustable delay lines of different optical input circuits is distributed.
Optionally, the spacing between optically tunable delay lines of different optical input circuits is 50-100 microns.
Optionally, the spacing between the straight waveguide transmission line of one of the different optical input circuits and the optically adjustable delay line of the adjacent optical input circuit is distributed.
Optionally, a distance between a straight waveguide transmission line of one of the different optical input circuits and an optically tunable delay line of an adjacent optical input circuit is greater than 5 microns.
An on-chip coherent light detection architecture-based detection method, wherein the on-chip coherent light detection architecture is the on-chip coherent light detection architecture, and the method comprises the following steps:
when each path of optical input circuit in the multipath optical input circuits reaches a corresponding time sequence, processing original input data and a preset matrix to generate a coherent optical signal;
and adding the coherent light signals to obtain operation matrix data.
Optionally, when each optical input circuit in the multiple optical input circuits reaches a corresponding time sequence, the step of processing the original input data and the preset matrix to generate the coherent optical signal includes:
When each optical input circuit in the multipath optical input circuits reaches a corresponding time sequence, multiplying the original input data with a preset matrix to generate a coherent optical signal.
Optionally, the step of adding the coherent optical signals to obtain operation matrix data includes:
Arranging the coherent optical signals;
And adding the coherent light signals based on the arranged sequence to obtain operation matrix data.
Optionally, the step of arranging the coherent optical signals includes:
Determining a processing event;
The coherent optical signals are arranged based on the sequence of processing events.
Optionally, the step of adding the coherent light signals based on the arranged order to obtain operation matrix data includes:
Determining a target position element in the coherent light signal correspondence matrix;
And adding the target position elements based on the arranged sequence to obtain operation matrix data.
The embodiment of the invention comprises a multi-path optical input circuit, a beam combiner and a photoelectric detector which are arranged on a substrate, wherein the multi-path optical input circuit is used for inputting coherent optical signals, optical signals of different paths of optical input circuits have different time sequences, the input end of the beam combiner is connected with the output end of the multi-path optical input circuit and is used for converging and inputting the multi-path coherent optical signals into the photoelectric detector, and the input end of the photoelectric detector is connected with the output end of the beam combiner and is used for adding the converged multi-path coherent optical signals based on the time sequences and outputting operation matrix data. The method comprises the steps of generating coherent optical signals in parallel through a plurality of paths of optical input circuits, outputting coherent optical signals with different time sequences to the optical input circuits with different paths, adding based on the time sequences, outputting operation matrix data to realize simultaneous detection and addition of the plurality of paths of coherent light, adding in an optical domain, and carrying out serialization processing on the data without carrying out serialization processing on the data.
Referring to fig. 5, there is shown a block diagram of a server embodiment of the present invention, including an on-chip coherent light detection architecture 10 as described above.
The on-chip coherent light detection architecture 10 can process transmitted data, thereby realizing the function of data operation.
The on-chip coherent light detection architecture comprises a multipath light input circuit, a beam combiner and a photoelectric detector which are arranged on a substrate,
The multi-path optical input circuit is used for inputting coherent optical signals, and the optical signals of different paths of optical input circuits have different time sequences;
The input end of the beam combiner is connected with the output end of the multipath optical input circuit and is used for collecting and inputting multipath coherent optical signals into the photoelectric detector;
The input end of the photoelectric detector is connected with the output end of the beam combiner and is used for adding the collected multipath coherent light signals based on time sequence and outputting operation matrix data.
Optionally, each of the multiple optical input circuits includes:
a straight waveguide transmission line for inputting the coherent optical signal;
an optically adjustable delay line connected to the straight waveguide transmission line for adjusting the timing of the coherent optical signal;
And the mode converter is connected with the optical adjustable delay line and is used for carrying out mode conversion on the coherent optical signal after the time sequence adjustment so as to input the beam combiner.
Optionally, the mode converter includes:
And the intrinsic mode converter is used for converting the fundamental mode of the coherent optical signal after the time sequence adjustment into a higher-order mode.
Optionally, the mode converter includes:
And the electromagnetic converter is used for converting the coherent optical signal after the time sequence adjustment from a transverse electric mode to a transverse magnetic mode.
Optionally, the optically adjustable delay lines are arranged in a continuous circular pattern, and the number of circular rings is positively correlated with the delay of the time sequence.
Optionally, the diameter of the ring is greater than 50 microns.
Optionally, the optically adjustable delay line is arranged in a spiral pattern, the number of turns of the spiral being positively correlated with the delay of the timing sequence.
Optionally, the optical tunable delay line has a delay of 1 to 100 picoseconds.
Optionally, the time sequence difference between the coherent optical signals input by each path of optical input circuit is 10-200 picoseconds.
Optionally, the frequency of the coherent optical signal input by each path of optical input circuit is 5-100 baud rate.
Optionally, the spacing between optically adjustable delay lines of different optical input circuits is distributed.
Optionally, the spacing between optically tunable delay lines of different optical input circuits is 50-100 microns.
Optionally, the spacing between the straight waveguide transmission line of one of the different optical input circuits and the optically adjustable delay line of the adjacent optical input circuit is distributed.
Optionally, a distance between a straight waveguide transmission line of one of the different optical input circuits and an optically tunable delay line of an adjacent optical input circuit is greater than 5 microns.
An on-chip coherent light detection architecture-based detection method, wherein the on-chip coherent light detection architecture is the on-chip coherent light detection architecture, and the method comprises the following steps:
when each path of optical input circuit in the multipath optical input circuits reaches a corresponding time sequence, processing original input data and a preset matrix to generate a coherent optical signal;
and adding the coherent light signals to obtain operation matrix data.
Optionally, when each optical input circuit in the multiple optical input circuits reaches a corresponding time sequence, the step of processing the original input data and the preset matrix to generate the coherent optical signal includes:
When each optical input circuit in the multipath optical input circuits reaches a corresponding time sequence, multiplying the original input data with a preset matrix to generate a coherent optical signal.
Optionally, the step of adding the coherent optical signals to obtain operation matrix data includes:
Arranging the coherent optical signals;
And adding the coherent light signals based on the arranged sequence to obtain operation matrix data.
Optionally, the step of arranging the coherent optical signals includes:
Determining a processing event;
The coherent optical signals are arranged based on the sequence of processing events.
Optionally, the step of adding the coherent light signals based on the arranged order to obtain operation matrix data includes:
Determining a target position element in the coherent light signal correspondence matrix;
And adding the target position elements based on the arranged sequence to obtain operation matrix data.
The embodiment of the invention comprises a multi-path optical input circuit, a beam combiner and a photoelectric detector which are arranged on a substrate, wherein the multi-path optical input circuit is used for inputting coherent optical signals, optical signals of different paths of optical input circuits have different time sequences, the input end of the beam combiner is connected with the output end of the multi-path optical input circuit and is used for converging and inputting the multi-path coherent optical signals into the photoelectric detector, and the input end of the photoelectric detector is connected with the output end of the beam combiner and is used for adding the converged multi-path coherent optical signals based on the time sequences and outputting operation matrix data. The method comprises the steps of generating coherent optical signals in parallel through a plurality of paths of optical input circuits, outputting coherent optical signals with different time sequences to the optical input circuits with different paths, adding based on the time sequences, outputting operation matrix data to realize simultaneous detection and addition of the plurality of paths of coherent light, adding in an optical domain, and carrying out serialization processing on the data without carrying out serialization processing on the data.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the embodiments of the invention.
The on-chip coherent light detection architecture, the detection method of the on-chip coherent light detection architecture and the server provided by the invention have been described in detail, and specific examples are used herein to illustrate the principles and embodiments of the invention, and the above examples are only for aiding in understanding the method of the invention and its core ideas, and meanwhile, to those skilled in the art, according to the ideas of the invention, there are variations in the specific embodiments and application scope, so the description should not be construed as limiting the invention.
Claims (18)
1. An on-chip coherent light detection architecture is characterized by comprising a multipath light input circuit, a beam combiner and a single photoelectric detector which are arranged on a substrate,
The multi-path optical input circuit is used for inputting coherent optical signals, the optical signals of different paths of optical input circuits have different time sequences, and the different time sequences are determined based on the path lengths of the different paths of optical input circuits;
The input end of the beam combiner is connected with the output end of the multipath optical input circuit and is used for collecting and inputting multipath coherent optical signals into the photoelectric detector;
The input end of the photoelectric detector is connected with the output end of the beam combiner, and is used for adding the collected multipath coherent light signals based on time sequence by utilizing the orthogonal characteristic among the eigenmodes and outputting operation matrix data;
The method comprises the steps of carrying out addition based on time sequence, and outputting operation matrix data, wherein the operation matrix data comprises the steps of arranging the coherent light signals, determining target position elements in a corresponding matrix of the coherent light signals, and carrying out addition on the target position elements based on the arranged sequence to obtain the operation matrix data.
2. The on-chip coherent light detection architecture according to claim 1, wherein each of said plurality of optical input circuits comprises:
a straight waveguide transmission line for inputting the coherent optical signal;
an optically adjustable delay line connected to the straight waveguide transmission line for adjusting the timing of the coherent optical signal;
And the mode converter is connected with the optical adjustable delay line and is used for carrying out mode conversion on the coherent optical signal after the time sequence adjustment so as to input the beam combiner.
3. The on-chip coherent light detection architecture of claim 2, wherein said mode converter comprises:
And the intrinsic mode converter is used for converting the fundamental mode of the coherent optical signal after the time sequence adjustment into a higher-order mode.
4. The on-chip coherent light detection architecture of claim 2, wherein said mode converter comprises:
And the electromagnetic converter is used for converting the coherent optical signal after the time sequence adjustment from a transverse electric mode to a transverse magnetic mode.
5. The on-chip coherent light detection architecture according to claim 2, wherein said optically tunable delay lines are arranged in a continuous circular pattern, the number of said circular rings being positively correlated with the delay of said timing sequence.
6. The on-chip coherent light detection architecture of claim 5, wherein said ring has a diameter greater than 50 microns.
7. The on-chip coherent light detection architecture according to claim 2, wherein said optically tunable delay line is arranged in a spiral pattern, the number of turns of the spiral being positively correlated with the delay of said timing sequence.
8. The on-chip coherent light detection architecture of claim 2, wherein said optically tunable delay line has a delay of 1-100 picoseconds.
9. The on-chip coherent optical detection architecture according to claim 2, wherein a timing difference between the coherent optical signals input from each optical input circuit is 10-200 picoseconds.
10. The on-chip coherent optical detection architecture according to claim 2, wherein the frequency of the coherent optical signal input by each optical input circuit is 5-100 baud rate.
11. The on-chip coherent light detection architecture according to claim 2, wherein optically tunable delay lines of different light input circuits are spaced apart by a spacing distribution.
12. The on-chip coherent light detection architecture according to claim 11, wherein the pitch between optically tunable delay lines of different light input circuits is 50-100 μm.
13. The on-chip coherent optical detection architecture of claim 2, wherein the straight waveguide transmission lines of one of the different optical input circuits are spaced apart from the optically tunable delay lines of the adjacent optical input circuits by a spacing distribution.
14. The on-chip coherent optical detection architecture of claim 13, wherein a spacing between a straight waveguide transmission line of one of the different optical input circuits and an optically tunable delay line of an adjacent optical input circuit is greater than 5 microns.
15. A detection method based on an on-chip coherent light detection architecture, wherein the on-chip coherent light detection architecture is the on-chip coherent light detection architecture of any one of claims 1 to 14, the method comprising:
when each path of optical input circuit in the multipath optical input circuits reaches a corresponding time sequence, processing original input data and a preset matrix to generate a coherent optical signal;
adding the coherent light signals to obtain operation matrix data;
the step of adding the coherent light signals to obtain operation matrix data comprises the steps of arranging the coherent light signals, adding the coherent light signals based on the arranged sequence to obtain operation matrix data;
The step of adding the coherent light signals based on the arranged order to obtain operation matrix data comprises the following steps:
Determining a target position element in the coherent light signal correspondence matrix;
And adding the target position elements based on the arranged sequence to obtain operation matrix data.
16. The method of claim 15, wherein the step of processing the original input data with a predetermined matrix to generate the coherent optical signal when each of the plurality of optical input circuits reaches a corresponding timing sequence comprises:
When each optical input circuit in the multipath optical input circuits reaches a corresponding time sequence, multiplying the original input data with a preset matrix to generate a coherent optical signal.
17. The method of claim 15, wherein the step of arranging the coherent optical signals comprises:
Determining a processing event;
The coherent optical signals are arranged based on the sequence of processing events.
18. A server comprising an on-chip coherent light detection architecture according to any one of claims 1-14.
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