CN108918085A - Light vector analysis method and device based on double chirp intensity modulateds - Google Patents
Light vector analysis method and device based on double chirp intensity modulateds Download PDFInfo
- Publication number
- CN108918085A CN108918085A CN201810641971.2A CN201810641971A CN108918085A CN 108918085 A CN108918085 A CN 108918085A CN 201810641971 A CN201810641971 A CN 201810641971A CN 108918085 A CN108918085 A CN 108918085A
- Authority
- CN
- China
- Prior art keywords
- double
- optical
- phase
- omega
- sideband
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention discloses a kind of light vector analysis methods based on double chirp intensity modulateds.Light carrier is divided into two-way, the different microwave signal difference phase-modulation of two frequencies in two-way light carrier, the different two-way double-side band phase modulated signal of phase is generated, the two is superimposed to obtain the light double-sideband signal of double chirp intensity modulateds；In the case where enabling the light double-sideband signal of double chirp intensity modulateds by optical device to be measured and without optical device to be measured respectively, it is converted into electric signal, and respectively with described two microwave signals to refer to, the width phase information of two components corresponding to the light double-sideband signal of double chirp intensity modulateds is extracted from electric signal；The width for finally calculating optical device to be measured mutually responds.The invention also discloses a kind of light vector analytical equipments based on double chirp intensity modulateds.The present invention had not only been able to achieve the high-acruracy survey that sun adjuster part width mutually responds, but also can expand measurement range, reduces the complexity of system, increases substantially measuring speed and efficiency.
Description
Technical Field
The present invention relates to an optical vector analysis method, and more particularly, to an optical vector analysis method and apparatus based on dual chirp intensity modulation.
Background
In the related art related to optical devices, it is necessary to accurately measure the spectral response of an optical device, which reflects the basic features and potential applications of the device, and is an indispensable step before the optical device is put into practical use. In the prior art, optical communication, optical sensing, optical processing and other systems mainly use the amplitude of light waves to carry information, and the spectral response measurement requirement of an optical device can be met only by a cursor quantity analysis technology. However, as the amount of information increases, the spectrum resources become more and more tense, and there is an urgent need for performing high-precision manipulation and application on light in multiple dimensions (amplitude, phase, polarization, etc.), and therefore, performing high-precision multi-dimensional spectral response measurement on an optical device has become a research hotspot in the related field. However, the current optical device spectral response measurement technology is still based on a low-resolution optical measurement technology, and a multidimensional, e.g., optical vector analysis technology, is still in an exploration stage, and the resolution is not high, so that the multidimensional spectral response of high-precision optical devices, such as an optical subset integrated chip, cannot be measured. Therefore, it is necessary to develop a high-resolution optical vector analysis technique and apparatus.
In the aspect of optical quantity measurement, a technology combining a wide-spectrum light source and spectral analysis is mainly adopted at present, namely, the spectral response of an optical device is pumped by the wide-spectrum light source, the spectral response is converted into the change of certain characteristics (generally amplitude) of an optical signal, and then the obtained signal is analyzed and compared with an original spectrum, so that the spectral response of the optical device can be obtained. The method is simple to operate, but only can measure the amplitude response, and the resolution is low. For example, AQ6370D from Yokogawa, japan, BOSA from Aragon, spain, and OCSA from APEX, france, these products can only measure the amplitude response and cannot analyze the phase information of the optical device. In the light vector measurement, there are two main techniques at present: the optical interference method and the broadband electric modulation method break through the bottleneck of the cursor measurement testing technology and can simultaneously measure the amplitude response and the phase response of the optical device. The optical interference method utilizes laser wavelength scanning to measure, is limited by the wavelength scanning precision of a frequency-swept laser, has low measurement resolution which is only pm magnitude, and has a sensitive optical interference structure to the external environment and poor stability. For example, the resolution of OVA5000 light vector analyzer, a product of LUNA corporation, USA, is only 1.6 pm. The wide-band modulation method loads a wide-spectrum electric signal with high spectral density onto an optical carrier through a wide-band electro-optical modulator, then pumps out the spectral response of the optical device to be detected, and then carries out digital signal processing and analysis on the amplitude and phase of a single spectral line of the pump signal, so that the amplitude and phase response of the optical device to be detected can be obtained. Because the spectral line interval of the electric signal is smaller, the precision of the light vector analysis technology based on the method is greatly improved.
In summary, in order to perform high-precision optical vector analysis on an optical device, a technical scheme based on broadband electrical modulation should be preferably selected. At present, the technical scheme is mainly realized by three methods: optical single sideband modulation, asymmetric optical double sideband modulation, and optical chirp intensity modulation. The methods combine microwave and photon technologies, utilize an electro-optical modulator to scan the wavelength of an optical domain to an electrical domain, and can realize high-resolution optical vector analysis due to ultrahigh fineness of electrical spectrum scanning and analysis. However, these techniques all have some drawbacks. The optical single-sideband modulation technique is limited by device bandwidth, sideband suppression ratio, nonlinear effect of the modulator, etc., and has narrow measurement range, small dynamic range and large measurement error [ reference: xue M, Pan S, HeC, et al.Wireless base optical vector network based on optical single-base modulation and optical frequency comb [ J ]. Optics Letters,2013,38(22): 4900-; the asymmetric optical double-sideband modulation method expands the measurement range, but the system introduces a plurality of additional devices, such as a signal source, a photoelectric detector, an amplitude-phase receiver and the like, thereby improving the complexity and the cost of the system. [ reference: QingT, Li S, Xue M, Li W, Zhu N and Pan S and Zhao Y. optical vector analysis based on systematic double-side modulation using a dual-drive dual-parallel Mach-Zehnder modulator [ J ] Optics Express,2017,25(5):4665-4671 ]; the optical chirp intensity modulation method [ see the chinese patent application No. 201710825114.3, published as 2018/1/26 ] not only expands the measurement range, but also reduces the cost and complexity of the system, but also needs to perform two times of calibration and two times of measurement when analyzing the amplitude response of the device, and is limited by the working speed of the phase adjustment module, and the time required for one time of measurement is long.
Therefore, although high-precision light vector analysis of optical devices can be realized at present, the methods have certain defects, and cannot simultaneously solve the problems of small measurement range, complex system structure, high cost, long test time and the like, so that the application of the high-precision light vector analysis technology is limited.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art and provide an optical vector analysis method based on double-chirp intensity modulation, which can realize high-precision measurement of amplitude-phase response of an optical device, expand the measurement range, reduce the complexity of a system and greatly improve the measurement speed and efficiency.
The invention specifically adopts the following technical scheme:
light vector analysis method based on double chirp intensity modulation, which is used for analyzing light vector with frequency of omegacThe optical carrier wave is divided into two paths, and the frequency is omegae1、ωe2The two microwave signals are respectively phase-modulated on two paths of optical carriers to generate two paths of double-sideband phase modulation signals, the two paths of double-sideband phase modulation signals have different phases, and then the two generated double-sideband phase modulation signals are superposed to obtain an optical double-sideband signal, omega, modulated by double chirp intensitye1And omegae2Is much smaller than omegae1、ωe2(ii) a Under the condition that the double-chirp-intensity-modulated optical double-sideband signal passes through an optical device to be measured and does not pass through the optical device to be measured respectively, the double-chirp-intensity-modulated optical double-sideband signal is converted into an electric signal, the two microwave signals are taken as references respectively, and amplitude-phase information of two components corresponding to the double-chirp-intensity-modulated optical double-sideband signal is extracted from the electric signal; finally, the omega of the device to be measured is obtained according to the following formulac±ωeAmplitude-phase response H at two frequenciesDUT(ωc+ωe)、HDUT(ωc-ωe)，ωeIs omegae1And omegae2Average value of (d):
wherein i1(ωe)、i2(ωe) Respectively extracting the amplitude and phase information of two components when the optical device is to be measured in the link; i.e. i1 SYS(ωe)、i2 SYS(ωe) Respectively, no light to be measured in the linkAmplitude and phase information of two components extracted during device manufacturing; hDUT(ωc) The optical device to be measured is at the optical carrier frequency omegacThe amplitude-phase response is a measurable constant; the two paths of phase modulators are completely same, and the light carrier intensities in the two paths are consistent, then Amplitude, theta, of optical carrier and sideband in the double sideband phase modulated signal1、θ2The phase differences between the two paths of double-sideband phase modulation signals and the other path of optical carrier are respectively shown, and η is the response coefficient of the photoelectric detector;*indicating taking the complex conjugate.
Further, the method further comprises: by varying omegae1And ωe2To obtain different omegaeAnd synthesizing the amplitude-phase response of the optical device to be measured at the frequencies to realize the broadband amplitude-phase response measurement of the optical device to be measured.
Preferably, the dual chirp intensity modulated optical double sideband signal is obtained by using a dual drive mach-zehnder modulator.
The following technical scheme can be obtained according to the same invention concept:
the light vector analysis device based on the double chirp intensity modulation comprises:
a probe light generation module for generating a probe light having a frequency of ωcThe optical carrier wave is divided into two paths, and the frequency is omegae1、ωe2The two microwave signals are respectively phase-modulated on two paths of optical carriers to generate two paths of double-sideband phase modulation signals, the two paths of double-sideband phase modulation signals have different phases, and then the two generated double-sideband phase modulation signals are superposed to obtain an optical double-sideband signal, omega, modulated by double chirp intensitye1And omegae2Is much smaller than omegae1、ωe2(ii) a Amplitude and phase extraction moduleThe dual-chirp-intensity-modulated optical double-sideband signal is converted into an electric signal under the condition that the dual-chirp-intensity-modulated optical double-sideband signal passes through an optical device to be measured and does not pass through the optical device to be measured respectively, and the amplitude-phase information of two components corresponding to the dual-chirp-intensity-modulated optical double-sideband signal is extracted from the electric signal by taking the two microwave signals as references respectively;
a control and data processing unit for obtaining the omega of the device to be measured according to the following formulac±ωeAmplitude-phase response H at two frequenciesDUT(ωc+ωe)、HDUT(ωc-ωe)，ωeIs omegae1And omegae2Average value of (d):
wherein i1(ωe)、i2(ωe) Respectively extracting the amplitude and phase information of two components when the optical device is to be measured in the link; i.e. i1 SYS(ωe)、i2 SYS(ωe) Respectively extracting the amplitude and phase information of two components when no optical device to be detected exists in the link; hDUT(ωc) The optical device to be measured is at the optical carrier frequency omegacThe amplitude-phase response is a measurable constant; the two paths of phase modulators are completely same, and the light carrier intensities in the two paths are consistent, then Amplitude, theta, of optical carrier and sideband in the double sideband phase modulated signal1、θ2Two-way double-sideband phase modulation signalThe phase difference between the signal and the other optical carrier, η is the response coefficient of the photodetector;*indicating taking the complex conjugate.
Further, the control and data processing unit is also used to vary ωe1And ωe2To obtain different omegaeAnd synthesizing the amplitude-phase response of the optical device to be measured at the frequencies to realize the broadband amplitude-phase response measurement of the optical device to be measured.
Preferably, the probe light generation module includes:
light source for outputting frequency of omegacThe optical carrier of (a);
a microwave source for outputting a frequency of omegae1、ωe2Two microwave signals of (omega)e1And omegae2Is much smaller than omegae1、ωe2；
The dual-drive Mach-Zehnder modulator is used for dividing the optical carrier into two paths, respectively modulating two microwave signals output by the microwave source in phase to the two paths of optical carriers to generate two paths of double-sideband phase modulation signals, and then superposing the two generated double-sideband phase modulation signals to obtain an optical double-sideband signal modulated by double-chirp intensity;
and the bias point controller is used for controlling the bias point of the dual-drive Mach-Zehnder modulator so as to enable the two paths of double-sideband phase modulation signals to have different phases.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
the invention overcomes the defects of narrow measurement range, large measurement error and the like of a single-sideband modulation method, expands the measurement range by one time, and eliminates the error caused by residual sideband; compared with an asymmetric light double-sideband modulation method, the invention has compact structure, simple operation and convenient application; in addition, the invention overcomes the defect that the optical chirp intensity modulation method needs to be calibrated and measured for many times, and can realize the rapid measurement of the optical device amplitude-phase response.
Drawings
FIG. 1 is a schematic structural diagram of an optical vector analysis apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the structure of a dual drive Mach-Zehnder modulator.
Detailed Description
Aiming at the defects of the prior art, the invention adopts the idea that two paths of double-sideband phase modulation signals with different phases are superposed to obtain a detection light signal, the detection light signal carrying the response information of the optical device to be measured is converted into an electric signal, the amplitude-phase information of two components is extracted by utilizing a microwave amplitude-phase extraction technology, and the amplitude-phase response of the optical device to be measured is calculated.
The invention relates to a light vector analysis method based on double chirp intensity modulation, which comprises the following specific steps: will have a frequency of ωcThe optical carrier wave is divided into two paths, and the frequency is omegae1、ωe2The two microwave signals are respectively phase-modulated on two paths of optical carriers to generate two paths of double-sideband phase modulation signals, the two paths of double-sideband phase modulation signals have different phases, and then the two generated double-sideband phase modulation signals are superposed to obtain an optical double-sideband signal, omega, modulated by double chirp intensitye1And omegae2Is much smaller than omegae1、ωe2(ii) a Under the condition that the double-chirp-intensity-modulated optical double-sideband signal passes through an optical device to be measured and does not pass through the optical device to be measured respectively, the double-chirp-intensity-modulated optical double-sideband signal is converted into an electric signal, the two microwave signals are taken as references respectively, and amplitude-phase information of two components corresponding to the double-chirp-intensity-modulated optical double-sideband signal is extracted from the electric signal; finally, the omega of the device to be measured is calculatedc±ωeAmplitude-phase response H at two frequenciesDUT(ωc+ωe)、HDUT(ωc-ωe)，ωeIs omegae1And omegae2Is measured.
The invention relates to a light vector analysis device based on double chirp intensity modulation, which comprises:
a probe light generation module for generating a probe light having a frequency of ωcThe optical carrier wave is divided into two paths, and the frequency is omegae1、ωe2The two microwave signals are respectively phase-modulated on two paths of optical carriers to generate two paths of double-sideband phase modulation signals, the two paths of double-sideband phase modulation signals have different phases, and then the two generated double-sideband phase modulation signals are superposed to obtain an optical double-sideband signal, omega, modulated by double chirp intensitye1And omegae2Is much smaller than omegae1、ωe2(ii) a The amplitude-phase extraction module is used for converting the double-chirp-intensity-modulated optical double-sideband signal into an electric signal under the condition that the double-chirp-intensity-modulated optical double-sideband signal passes through an optical device to be detected and does not pass through the optical device to be detected respectively, and extracting amplitude-phase information of two components corresponding to the double-chirp-intensity-modulated optical double-sideband signal from the electric signal by taking the two microwave signals as references respectively;
a control and data processing unit for obtaining the omega of the optical device to be measuredc±ωeAmplitude-phase response H at two frequenciesDUT(ωc+ωe)、HDUT(ωc-ωe)，ωeIs omegae1And omegae2Is measured.
In the above technical solution, the detection light generation module may be constructed by combining two phase modulators with a light source, a microwave source, an optical coupler, and the like, but in order to improve the integration level and reduce the system implementation cost, the present invention is preferably implemented by using a dual-drive mach-zehnder modulator available in the market.
To facilitate understanding of the public, the present invention will be described in further detail with reference to a preferred embodiment and the accompanying drawings:
as shown in fig. 1, the optical vector analysis device in the present embodiment includes: the device comprises a light source, a dual-drive Mach-Zehnder modulator, a microwave source, a bias point controller, two photoelectric detectors, two amplitude-phase extraction units and a control and data processing unit. The dual-drive Mach-Zehnder modulator modulates microwave signals with two different frequencies output by a microwave source onto optical carriers output by the light source to generate optical double-sideband signals modulated by double chirp intensity; the bias point controller is used for controlling the phases of two paths of optical signals of the dual-drive Mach-Zehnder modulator; the photoelectric detector converts the detection optical signal passing through the optical device to be detected into an electric signal to be output; the two amplitude-phase extraction units respectively take the two microwave signals as reference, and extract amplitude-phase information of two components corresponding to the double-chirp-intensity modulated optical double-sideband signal from the electric signal; and the control and data processing unit is used for controlling the operation of the whole device and processing the extracted data so as to obtain the amplitude-phase response of the optical device to be detected.
The structure of the dual-drive Mach-Zehnder modulator is shown in FIG. 2, and the dual-drive Mach-Zehnder modulator comprises an optical input port, a Y branch 1, an optical upper branch, an optical lower branch, a Y branch 2 and an optical output port, wherein the optical upper branch and the optical lower branch are both electro-optical phase modulators and are provided with microwave ports and bias point control ports. The specific working principle is as follows:
an optical signal enters the Y branch 1 from an optical input port and then is divided into two optical signals to be transmitted along two channels of an optical upper branch and an optical lower branch respectively; because the upper and lower optical branches are phase modulators, microwave signals of the microwave port are modulated onto optical signals to generate double-sideband phase modulation signals; meanwhile, because the microwave signal frequencies of the upper and lower optical branches are different, the optical signals output by the two optical branches are coherently superposed in the Y branch 2 to form two chirp intensity modulated optical double-sideband signals. In addition, the phase difference between the optical signals of the optical upper and lower arms can be controlled by the bias point controller through the bias point control port.
Frequency omega of two microwave signals loaded on the dual-drive Mach-Zehnder modulatore1、ωe2Is much smaller than omegae1And ωe2Time, omegae1、ωe2Can approximateIs equal to any frequency value between the two (preferably the mean value ω of the two)e) The two chirp intensity modulated double sideband signals in the output optical signal thereof can be expressed by the following expression:
(1) wherein j is an imaginary unit; omegacIs the angular frequency of the optical carrier; a. the0And A1The amplitudes of the carrier and the sideband of the modulation signals respectively introduced into the branches of the dual-drive Mach-Zehnder modulator (the upper and lower phase modulators are the same, and the amplitudes of the two carriers and the sideband in the operation of the device are the same); thetanThe phase difference is introduced to two branches of the dual-drive Mach-Zehnder modulator by the bias point controller, n is 1, and 2 is two chirp intensity modulation signals generated under the control of the bias point controller.
For n-1, the chirp intensity modulated double sideband signal E1(t) is:
after passing through the optical device to be tested, the expression of the optical signal is as follows:
wherein H (ω) ═ HDUT(ω)·HSYS(ω)，HDUT(omega) and HSYSAnd (omega) is the transfer function of the optical device to be measured and the transfer function of the measuring system.
The optical signal is then converted into an electrical signal by a photodetector, i.e.Wherein η is the response coefficient of the photodetector.Extracting amplitude and phase of the electric signal to obtain amplitude and phase information i1(ωe) The expression of (a) is:
wherein,*expressed as taking complex conjugates. Order toEquation (4) can be converted to:
for the same reason, let n equal 2Amplitude and phase information i of the electrical signal2(ωe) The expression of (a) is:
in conjunction with (5) and (6), the response of the device to be measured can be found as:
before the optical device to be measured is accessed, the system needs to be directly calibrated (the optical device to be measured does not exist in the system and is directly measured) so as to eliminate the influence of the system response on the measurement result. At this time, the system response expression is:
wherein i1 SYS(ωe)、i2 SYS(ωe) Respectively the amplitude and phase information of the electrical signal obtained by the direct calibration.
The transfer function of the optical device to be measured can be obtained from equations (7) to (10):
wherein,(ωc) The optical device to be measured is at the optical carrier frequency omegacThe response is a measurable constant.
It should be noted that, in the above technical solution, a photodetector may also be used to convert the detection optical signal passing through the optical device to be detected into an electrical signal, and then a power divider is used to divide the electrical signal into two paths and send the two paths to the amplitude-phase extraction unit 1 and the amplitude-phase extraction unit 2, so as to extract amplitude-phase information of components corresponding to the two chirp intensity modulated optical signals in the photoelectrically converted electrical signal.
Claims (6)
1. The light vector analysis method based on double chirp intensity modulation is characterized in that the frequency is omegacThe optical carrier wave is divided into two paths, and the frequency is omegae1、ωe2The two microwave signals are respectively phase-modulated on two paths of optical carriers to generate two paths of double-sideband phase modulation signals, the two paths of double-sideband phase modulation signals have different phases, and then the two generated double-sideband phase modulation signals are superposed to obtain an optical double-sideband signal, omega, modulated by double chirp intensitye1And omegae2Is much smaller than omegae1、ωe2(ii) a Under the condition that the double-chirp-intensity-modulated optical double-sideband signal passes through an optical device to be measured and does not pass through the optical device to be measured respectively, the double-chirp-intensity-modulated optical double-sideband signal is converted into an electric signal, the two microwave signals are taken as references respectively, and amplitude-phase information of two components corresponding to the double-chirp-intensity-modulated optical double-sideband signal is extracted from the electric signal; finally, the omega of the device to be measured is obtained according to the following formulac±ωeAmplitude-phase response H at two frequenciesDUT(ωc+ωe)、HDUT(ωc-ωe)，ωeIs omegae1And omegae2Average value of (d):
wherein i1(ωe)、i2(ωe) Respectively extracting the amplitude and phase information of two components when the optical device is to be measured in the link; i.e. i1 SYS(ωe)、i2 SYS(ωe) Respectively extracting the amplitude and phase information of two components when no optical device to be detected exists in the link; hDUT(ωc) The optical device to be measured is at the optical carrier frequency omegacThe amplitude-phase response is a measurable constant; the two paths of phase modulators are completely same, and the light carrier intensities in the two paths are consistent, thenA0、A1Amplitude, theta, of optical carrier and sideband in the double sideband phase modulated signal1、θ2The phase differences between the two paths of double-sideband phase modulation signals and the other path of optical carrier are respectively shown, and η is the response coefficient of the photoelectric detector;*indicating taking the complex conjugate.
2. Such as rightThe method of claim 1, further comprising: by varying omegae1And ωe2To obtain different omegaeAnd synthesizing the amplitude-phase response of the optical device to be measured at the frequencies to realize the broadband amplitude-phase response measurement of the optical device to be measured.
3. The method of claim 1, wherein the dual chirped intensity modulated optical double sideband signal is obtained using a dual drive mach-zehnder modulator.
4. An optical vector analysis device based on dual chirp intensity modulation, comprising:
a probe light generation module for generating a probe light having a frequency of ωcThe optical carrier wave is divided into two paths, and the frequency is omegae1、ωe2The two microwave signals are respectively phase-modulated on two paths of optical carriers to generate two paths of double-sideband phase modulation signals, the two paths of double-sideband phase modulation signals have different phases, and then the two generated double-sideband phase modulation signals are superposed to obtain an optical double-sideband signal, omega, modulated by double chirp intensitye1And omegae2Is much smaller than omegae1、ωe2(ii) a The amplitude-phase extraction module is used for converting the double-chirp-intensity-modulated optical double-sideband signal into an electric signal under the condition that the double-chirp-intensity-modulated optical double-sideband signal passes through an optical device to be detected and does not pass through the optical device to be detected respectively, and extracting amplitude-phase information of two components corresponding to the double-chirp-intensity-modulated optical double-sideband signal from the electric signal by taking the two microwave signals as references respectively;
a control and data processing unit for obtaining the omega of the device to be measured according to the following formulac±ωeAmplitude-phase response H at two frequenciesDUT(ωc+ωe)、HDUT(ωc-ωe)，ωeIs omegae1And omegae2Average value of (d):
wherein i1(ωe)、i2(ωe) Respectively extracting the amplitude and phase information of two components when the optical device is to be measured in the link; i.e. i1 SYS(ωe)、i2 SYS(ωe) Respectively extracting the amplitude and phase information of two components when no optical device to be detected exists in the link; hDUT(ωc) The optical device to be measured is at the optical carrier frequency omegacThe amplitude-phase response is a measurable constant; the two paths of phase modulators are completely same, and the light carrier intensities in the two paths are consistent, thenA0、A1Amplitude, theta, of optical carrier and sideband in the double sideband phase modulated signal1、θ2The phase differences between the two paths of double-sideband phase modulation signals and the other path of optical carrier are respectively shown, and η is the response coefficient of the photoelectric detector;*indicating taking the complex conjugate.
5. The apparatus of claim 4, wherein the control and data processing unit is further configured to vary ωe1And ωe2To obtain different omegaeAnd synthesizing the amplitude-phase response of the optical device to be measured at the frequencies to realize the broadband amplitude-phase response measurement of the optical device to be measured.
6. The apparatus of claim 4, wherein the probe light generation module comprises:
light source for outputting frequency of omegacThe optical carrier of (a);
a microwave source for outputting a frequency of omegae1、ωe2Two microwave signals of (omega)e1And omegae2Is much smaller than omegae1、ωe2；
The dual-drive Mach-Zehnder modulator is used for dividing the optical carrier into two paths, respectively modulating two microwave signals output by the microwave source in phase to the two paths of optical carriers to generate two paths of double-sideband phase modulation signals, and then superposing the two generated double-sideband phase modulation signals to obtain an optical double-sideband signal modulated by double-chirp intensity;
and the bias point controller is used for controlling the bias point of the dual-drive Mach-Zehnder modulator so as to enable the two paths of double-sideband phase modulation signals to have different phases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810641971.2A CN108918085A (en) | 2018-06-21 | 2018-06-21 | Light vector analysis method and device based on double chirp intensity modulateds |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810641971.2A CN108918085A (en) | 2018-06-21 | 2018-06-21 | Light vector analysis method and device based on double chirp intensity modulateds |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108918085A true CN108918085A (en) | 2018-11-30 |
Family
ID=64420773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810641971.2A Pending CN108918085A (en) | 2018-06-21 | 2018-06-21 | Light vector analysis method and device based on double chirp intensity modulateds |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108918085A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109581301A (en) * | 2018-12-03 | 2019-04-05 | 杭州电子科技大学 | Double chirp frequency doubling signal generating devices and its method based on double-parallel modulator |
| CN109728862A (en) * | 2019-03-06 | 2019-05-07 | 南京航空航天大学 | Method and device for measuring parameters of coherent optical receiver based on dual-frequency modulation |
| CN110017967A (en) * | 2019-03-04 | 2019-07-16 | 电子科技大学 | A kind of electro-optic intensity modulator chirp parameter test method based on phase bit comparison |
| CN113551882A (en) * | 2021-07-21 | 2021-10-26 | 南京航空航天大学 | Optical vector analysis technology and device with time domain resolution capability |
| CN115993765A (en) * | 2023-02-20 | 2023-04-21 | 浙江赛思电子科技有限公司 | Laser signal modulation system and CPT Maser atomic clock |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105409070A (en) * | 2013-01-02 | 2016-03-16 | Oe解决方案美国股份有限公司 | Tunable U-laser transmitter with integrated Mach-Zehnder modulator |
| CN105738080A (en) * | 2016-02-24 | 2016-07-06 | 苏州六幺四信息科技有限责任公司 | Optical device spectral response measurement method and device |
| CN106209249A (en) * | 2016-07-26 | 2016-12-07 | 浙江大学 | The double chirp radar pulse generator of wideband adjustable based on microwave photon technology |
| CN106483373A (en) * | 2016-11-03 | 2017-03-08 | 南京航空航天大学 | A kind of electrooptic modulator frequency response measurement method and measuring system |
| CN107132027A (en) * | 2017-04-18 | 2017-09-05 | 中国科学院半导体研究所 | The measuring method and device of optical device broadband frequency response value |
| CN107634807A (en) * | 2017-09-14 | 2018-01-26 | 苏州六幺四信息科技有限责任公司 | Optical vector analysis method and device based on chirp intensity modulation |
| CN108088655A (en) * | 2017-12-18 | 2018-05-29 | 南京航空航天大学 | Optical device measuring method, device based on double sideband modulation and frequency displacement |
-
2018
- 2018-06-21 CN CN201810641971.2A patent/CN108918085A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105409070A (en) * | 2013-01-02 | 2016-03-16 | Oe解决方案美国股份有限公司 | Tunable U-laser transmitter with integrated Mach-Zehnder modulator |
| CN105738080A (en) * | 2016-02-24 | 2016-07-06 | 苏州六幺四信息科技有限责任公司 | Optical device spectral response measurement method and device |
| CN106209249A (en) * | 2016-07-26 | 2016-12-07 | 浙江大学 | The double chirp radar pulse generator of wideband adjustable based on microwave photon technology |
| CN106483373A (en) * | 2016-11-03 | 2017-03-08 | 南京航空航天大学 | A kind of electrooptic modulator frequency response measurement method and measuring system |
| CN107132027A (en) * | 2017-04-18 | 2017-09-05 | 中国科学院半导体研究所 | The measuring method and device of optical device broadband frequency response value |
| CN107634807A (en) * | 2017-09-14 | 2018-01-26 | 苏州六幺四信息科技有限责任公司 | Optical vector analysis method and device based on chirp intensity modulation |
| CN108088655A (en) * | 2017-12-18 | 2018-05-29 | 南京航空航天大学 | Optical device measuring method, device based on double sideband modulation and frequency displacement |
Non-Patent Citations (1)
| Title |
|---|
| D.ZHU .ETC: ""Dual-Chirp Microwave Waveform Generation Using a Dual-Parallel Mach-Zehnder Modulator"", 《IEEE PHOTONICS TECHNOLOGY LETTERS》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109581301A (en) * | 2018-12-03 | 2019-04-05 | 杭州电子科技大学 | Double chirp frequency doubling signal generating devices and its method based on double-parallel modulator |
| CN110017967A (en) * | 2019-03-04 | 2019-07-16 | 电子科技大学 | A kind of electro-optic intensity modulator chirp parameter test method based on phase bit comparison |
| CN110017967B (en) * | 2019-03-04 | 2020-12-11 | 电子科技大学 | A method for measuring chirp parameters of electro-optical intensity modulators based on phase comparison |
| CN109728862A (en) * | 2019-03-06 | 2019-05-07 | 南京航空航天大学 | Method and device for measuring parameters of coherent optical receiver based on dual-frequency modulation |
| CN113551882A (en) * | 2021-07-21 | 2021-10-26 | 南京航空航天大学 | Optical vector analysis technology and device with time domain resolution capability |
| CN115993765A (en) * | 2023-02-20 | 2023-04-21 | 浙江赛思电子科技有限公司 | Laser signal modulation system and CPT Maser atomic clock |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108918085A (en) | Light vector analysis method and device based on double chirp intensity modulateds | |
| CN107528638B (en) | Estimation of Angle of Arrival for Broadband Microwave Signals Based on Microwave Photon Filtering | |
| CN107634807B (en) | Light vector analysis method and device based on chirp intensity modulation | |
| CN104990690B (en) | A kind of optical device frequency response measurement apparatus and method | |
| CN102638305B (en) | Optical single-side band modulation based optical device measuring method and optical single-side band modulation based optical device measuring device | |
| CN103954356B (en) | A kind of optical device measurement of spectral response method, measuring system | |
| US6873405B2 (en) | Propagation measuring apparatus and a propagation measuring method | |
| CN104101484B (en) | Optical device measuring method based on double sideband modulation and measurement apparatus | |
| CN107132027B (en) | Method and device for measuring broadband frequency response value of optical device | |
| CN105738080B (en) | A kind of optical device measurement of spectral response method and measurement apparatus | |
| CN103091072B (en) | Based on optical device measuring method, the measurement mechanism of optical SSB modulation | |
| CN107085143A (en) | A photoelectric frequency response tester and test method | |
| CN108088655A (en) | Optical device measuring method, device based on double sideband modulation and frequency displacement | |
| CN103645371B (en) | A kind of apparatus and method measuring electro-optic phase modulator half-wave voltage | |
| CN105910797A (en) | Optical device spectrum response measurement method and measurement device based on double sideband modulation and stimulated Brillouin scattering effect | |
| CN106768896B (en) | Ultrahigh resolution light vector analysis method and device | |
| CN103048121A (en) | Optical device measuring method and measuring device | |
| CN106501601B (en) | A kind of photodetector frequency response measurement method and measuring system | |
| CN107741525A (en) | Photodetector Frequency Response Measuring Method and Device | |
| CN112683495B (en) | Optical device frequency response measuring method and device with time domain analysis capability | |
| CN107389315B (en) | Optical device frequency response measurement method and measuring device | |
| CN107966172B (en) | Broadband photoelectric detector responsivity tester and testing method thereof | |
| CN108566244B (en) | Multi-channel parallel optical device spectral response measurement method and device | |
| CN105606343B (en) | A kind of Larger Dynamic range optical device measurement method and measuring system | |
| CN115664512B (en) | Method for testing frequency response parameters of electro-optic modulator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181130 |
|
| RJ01 | Rejection of invention patent application after publication |