CN111766722B - 1-Division multiplexing circulator array system - Google Patents
1-Division multiplexing circulator array system Download PDFInfo
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- CN111766722B CN111766722B CN202010586211.3A CN202010586211A CN111766722B CN 111766722 B CN111766722 B CN 111766722B CN 202010586211 A CN202010586211 A CN 202010586211A CN 111766722 B CN111766722 B CN 111766722B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/09—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect
- G02F1/093—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect used as non-reciprocal devices, e.g. optical isolators, circulators
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/93—Lidar systems specially adapted for specific applications for anti-collision purposes
- G01S17/931—Lidar systems specially adapted for specific applications for anti-collision purposes of land vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
- G01S7/4818—Constructional features, e.g. arrangements of optical elements using optical fibres
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/27—Optical coupling means with polarisation selective and adjusting means
- G02B6/2746—Optical coupling means with polarisation selective and adjusting means comprising non-reciprocal devices, e.g. isolators, FRM, circulators, quasi-isolators
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- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Optics & Photonics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention discloses a 1-division multiplexing circulator array system which comprises a polarization component, a 1-division multiplexing optical fiber collimation component, a first multiplexing optical fiber collimation component, a second multiplexing optical fiber collimation component and an optical rotation component, wherein the 1-division multiplexing optical fiber collimation component is used for dividing single-channel signal light into multiple-channel signal light, the polarization component can transmit P-polarization-state signal light and transmit the P-polarization-state signal light to the optical rotation component, the optical rotation component can receive P-polarization-state signal light input in the forward direction and input the signal light into the first multiplexing optical fiber collimation component, the optical rotation component can convert P-polarization-state signal light received by the first multiplexing optical fiber collimation component in the reverse direction into S-polarization-state signal light and transmit the S-polarization-state signal light to the polarization component, and the polarization component can fully reflect and input the S-polarization-state signal light to the second multiplexing optical fiber collimation component. The invention has the advantages that the invention can realize the functions of dividing the single-path P polarized signal light into 8 paths from 1 path and outputting the 8 paths of signal light arrays.
Description
Technical Field
The invention relates to the technical field of optics, in particular to a 1-division multiplexing circulator array system.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
The fiber optic circulator is a unidirectional device capable of directing signal light from one port to another, with only unidirectional transmission at a time. For example, if a signal is input from port 1, it is output from port 2, and if a signal is output from port 2, it is output from port 3. The optical fiber circulator can realize bidirectional transmission on one optical fiber and is commonly used in the fields of laser radar, active Electronic Scanning Antenna (AESA) array, satellite communication and optical communication dense wavelength division multiplexing system, bidirectional communication system, dispersion compensation, EDFA application, optical Time Domain Reflectometry (OTDR) technical measurement and the like.
As the communication technology advances into the 5G era, the Massive increase of the 5G key technology Massive MIMO (Multi Input Multi Output multiple input multiple output) channels increases, and the demand of the optical fiber circulator will increase greatly with the application of Massive MIMO, so that the requirements on the array and integration of the optical fiber circulator will also increase.
It should be noted that the foregoing description of the background art is only for the purpose of providing a clear and complete description of the technical solution of the present invention and is presented for the convenience of understanding by those skilled in the art. The above-described solutions are not considered to be known to the person skilled in the art simply because they are set forth in the background of the invention section.
Disclosure of Invention
In order to overcome the defects in the prior art, the embodiment of the invention provides a 1-division multiplexing circulator array system which can simultaneously realize the functions of dividing a single path of P polarized signal light into 8 paths from 1 path and outputting the 8 paths of signal light by an array.
The embodiment of the application discloses a 1-division multiplexing circulator array system, which comprises a polarization component, a 1-division multiplexing optical fiber collimation component, a first multiplexing optical fiber collimation component, a second multiplexing optical fiber collimation component and an optical rotation component;
The 1-division multiplexing optical fiber collimation assembly, the first multiplexing optical fiber collimation assembly and the second multiplexing optical fiber collimation assembly are respectively and correspondingly arranged with the polarization assembly, wherein the 1-division multiplexing optical fiber collimation assembly and the first multiplexing optical fiber collimation assembly are respectively arranged on two opposite sides of the polarization assembly;
the optical rotation assembly is arranged between the polarization assembly and the first multi-path optical fiber collimation assembly;
The 1-division multiplexing optical fiber collimation component is used for dividing a single-path P polarization state signal light into multiple paths of P polarization state signal light;
The first multi-path optical fiber collimation assembly can receive first signal light which is positively input through the 1-division multi-path optical fiber collimation assembly, the polarization assembly and the optical rotation assembly respectively;
The optical rotation component can transmit the second signal light input reversely to the second multipath collimation component through the polarization component.
Further, the polarization component comprises a polarization beam splitter prism formed by two right-angle prisms, and an interference film layer is arranged on the inclined plane where the two right-angle prisms are attached to each other, so that P polarized signal light and total reflection S polarized signal light can be transmitted.
Further, the 1-division multiplexing optical fiber collimation assembly is composed of a polarization-maintaining single-core optical fiber tail fiber, a splitter chip and a first 8-channel lens array, wherein the polarization-maintaining single-core optical fiber tail fiber and the first 8-channel lens array are respectively arranged on two sides of the splitter chip and are respectively optically coupled with the splitter chip, and the first 8-channel lens array is located between the splitter chip and the polarization assembly.
Further, the first multi-path optical fiber collimation component is formed by optical coupling of a first 8-channel polarization maintaining optical fiber array and a second 8-channel lens array, wherein the second 8-channel lens array is positioned between the first 8-channel polarization maintaining optical fiber array and the optical rotation component.
Further, the second multi-path optical fiber collimation component is formed by optical coupling of a second 8-channel polarization maintaining optical fiber array and a third 8-channel lens array, wherein the third 8-channel lens array is positioned between the second 8-channel polarization maintaining optical fiber array and the polarization component.
Further, the optical rotation component comprises a 1/4 wave plate, a Faraday rotation piece and a magnetic ring which are arranged at intervals, so that the polarization state of the optical signal passing forward through the optical rotation component is maintained, and the polarization state of the optical signal passing backward through the optical rotation component is rotated by 90 degrees.
Further, the interval between two adjacent channels of the first 8-channel lens array, the interval between two adjacent channels of the second 8-channel lens array, and the interval between two adjacent channels of the third 8-channel lens array are all 0.5 or 0.75mm.
Further, the polarization component, the 1-division multiplexing optical fiber collimation component, the first multiplexing optical fiber collimation component, the second multiplexing optical fiber collimation component and the optical rotation component are glued on the substrate through optical glue.
Further, the first optical path is formed by the 1-division multiplexing optical fiber collimating component, the polarization component, the optical rotation component and the first multiplexing optical fiber collimating component along the signal light transmission direction, and the second optical path is formed by the first multiplexing optical fiber collimating component, the optical rotation component, the polarization component and the second multiplexing optical fiber collimating component along the signal light transmission direction, wherein the amplitude and the frequency of the signal light in the first optical path are different from those of the signal light in the second optical path.
By the technical scheme, the invention has the following beneficial effects:
1. According to the application, through the first optical path, the first optical path is formed by the 1-way-8 optical fiber collimation assembly, the polarization assembly, the optical rotation assembly and the first multi-way optical fiber collimation assembly along the transmission direction of the signal light, so that the single-way P polarized signal light can be divided into 8 ways from 1 way and is effectively output;
2. according to the application, through the second optical path, the second optical path is formed by the first multi-path optical fiber collimation assembly, the optical rotation assembly, the polarization assembly and the second multi-path optical fiber collimation assembly along the transmission direction of the signal light, so that the function of outputting an array of 8 paths of signal light is realized.
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments, as illustrated in the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the overall device structure in an embodiment of the present invention;
FIG. 2 is a schematic view of the overall apparatus in a first optical path according to an embodiment of the present invention;
FIG. 3 is a schematic view of the whole device in a second optical path according to the embodiment of the present invention;
FIG. 4 is a schematic diagram of a first multi-fiber collimation assembly in an embodiment of the invention;
FIG. 5 is a schematic diagram of a second multi-path fiber optic collimation assembly in an embodiment of the invention;
FIG. 6 is a schematic view of the structure of an optical rotation assembly in an embodiment of the present invention.
The reference numerals of the drawings comprise a polarizing component 1, a first multipath optical fiber collimation component 2, a second multipath optical fiber collimation component 3, an optical rotation component 4, an optical rotation component 5, a polarization-maintaining single-core optical fiber tail fiber 6, a splitter chip 7, a first 8-channel lens array 8, a substrate 21, a first 8-channel polarization-maintaining optical fiber array 22, a second 8-channel lens array 31, a second 8-channel polarization-maintaining optical fiber array 32, a third 8-channel lens array 41, a 1/4 wave plate 42, a Faraday rotary piece 43 and a magnetic ring.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, in the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and to distinguish between similar objects, and there is no order of preference between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
Referring to fig. 1, a 1-division multiplexing circulator array system is disclosed in this embodiment, and includes a polarization component 1, a 1-division multiplexing optical fiber alignment component, a first multiplexing optical fiber alignment component 2, a second multiplexing optical fiber alignment component 3, an optical rotation component 4, and a substrate 8, where the above components are glued on the substrate 8 by optical glue.
In this embodiment, the polarizing component 1 includes a polarizing beam splitter prism formed by two right angle prisms, and an interference film layer is disposed on an inclined plane where the two right angle prisms are attached to each other, so as to be capable of transmitting P-polarized signal light and total reflection S-polarized signal light. Wherein, the interference film layer can be set up by the multilayer according to actual demand. Specifically, in one state, the polarization component 1 can transmit polarized signal light and transmit the polarized signal light to the optical rotation component 4, and in the other state, the polarization component 1 can input the S polarized signal light into the second multi-path optical fiber collimation component 3 in a total reflection mode.
As shown in fig. 6, in this embodiment, the optical rotation member 4 includes a 1/4 wave plate 41, a faraday rotation plate 42, and a magnetic ring 43 arranged at intervals so that the polarization state of the optical signal passing forward through the optical rotation member 4 is maintained and the polarization state of the optical signal passing backward through the optical rotation member 4 is rotated by 90 °. Specifically, the magnetic ring 43 is in a hollow cylindrical shape, and the 1/4 wave plate 41 and the faraday rotator 42 are both disposed in the magnetic ring 43 at intervals. In one embodiment, the signal light passing forward through the 1/4 wave plate 41 is left-handed by 45 ° and right-handed by 45 ° through the faraday rotator 42, so that the polarization of the signal light passing forward through the optical rotation assembly 4 is maintained. Since the 1/4 wave plate 41 has a direction, the signal light passing reversely through the faraday rotator 42 is right-handed 45 °, and passes through the 1/4 wave plate 41 by right-handed 45 °, the polarization state of the signal light passing reversely through the optical rotation member 4 is rotated by 90 °.
Wherein the system includes a first optical path and a second optical path. The signal light (P-state polarized signal light) of the first light path is input from the end of the 1-division multiplexing optical fiber collimating component (Prot 1) and output from the end of the first multiplexing optical fiber collimating component (Prot 2), so that the function of dividing the single-path P-state polarized signal light into 8 paths from 1 path is realized. The signal light (P-state polarized signal light) of the second light path is input from the end of the first multi-path optical fiber collimating component 2 (Prot 2) and is input from the end of the second multi-path optical fiber collimating component 3 (Prot 3), so that the function of outputting an array of 8 paths of signal light is realized. It should be noted that the signal light of the first optical path (P-polarized signal light) and the signal light of the second optical path (P-polarized signal light) have different parameters such as amplitude, frequency, and the like, so that no interference phenomenon occurs.
As shown in fig. 1-2 and fig. 4, in this embodiment, the first optical path is formed by the first multi-path optical fiber collimating component 2, the polarizing component 1, the optical rotatory component 4, and the first multi-path optical fiber collimating component 2 along the signal light transmission direction. The 1-division multiplexing optical fiber collimation assembly is composed of a polarization-maintaining single-core optical fiber pigtail 5, a splitter chip 6 and a first 8-channel lens array 7, and the polarization-maintaining single-core optical fiber pigtail 5 and the first 8-channel lens array 7 are respectively and optically coupled with the splitter chip 6. The first multi-path optical fiber collimation assembly 2 is formed by optical coupling of a first 8-channel polarization maintaining optical fiber array 21 and a second 8-channel lens array 22. Specifically, the components are, from left to right, a polarization-maintaining single-core fiber pigtail 5, a splitter chip 6, a first 8-channel lens array 7, a polarization component 1, an optical rotation component 4, a second 8-channel lens array 22 and a first 8-channel polarization-maintaining fiber array 21.
Through the arrangement mode, the single-path P polarized signal light is input from the polarization-maintaining single-core fiber pigtail 5 (Prot 1), the single-path P polarized signal light is divided into multiple paths of signal light after passing through the splitter chip 6, the single-path P polarized signal light is preferably divided into 8 paths of signal light (P polarized signal light) in the mode, when the 8 paths of signal light (P polarized signal light) pass through the first 8-path lens array 7, the first 8-path lens array 7 respectively performs beam collimation on each path of signal light, the 8 paths of signal light after beam collimation firstly passes through the polarization component 1 and then passes through the optical rotation component 4 in the forward direction, the polarization direction of the 8 paths of signal light is not changed at this time, and then the signal light is continuously transmitted to the second 8-path lens array 22, and the second 8-path lens array 22 outputs the signal light after performing beam collimation on the 8 paths of signal light through the first 8-path polarization-maintaining optical fiber array 21 (Prot 2), so that the function of dividing the single-path P polarized signal light into 8 paths is realized.
As shown in fig. 1, 3 and 6, in the present embodiment, the second optical path is formed by the first multi-path optical fiber collimating component 2, the optical rotatory component 4, the polarizing component 1 and the second multi-path optical fiber collimating component 3 along the signal light transmission direction. The second multi-path optical fiber collimation assembly 3 is formed by optical coupling of a second 8-channel polarization maintaining optical fiber array 31 and a third 8-channel lens array 32. Specifically, the second 8-channel polarization maintaining fiber array 31 is located below the polarization component 1, and the third 8-channel lens array 32 is located between the second 8-channel polarization maintaining fiber array 31 and the polarization component 1.
Through the above arrangement, 8 paths of signal light (P-state polarized signal light) are input from the end of the first 8-path polarization maintaining fiber array 21 (Prot 2), when passing through the second 8-path lens array 22, the second 8-path lens array 22 performs beam collimation on each path of signal light, the 8 paths of signal light after beam collimation reversely enter the optical rotation assembly 4, at this time, the polarization direction of the 8 paths of signal light (P-state polarized signal light) is rotated by 90 degrees and is converted into 8 paths of S-state polarized signal light, after entering the polarization assembly 1, total reflection occurs under the action of an interference film layer arranged on an inclined plane where two right angle prisms are attached, the 8 paths of S-state polarized signal light is deflected downwards by 90 degrees so as to be input into the third 8-path lens array 32, and after the 8 paths of S-state polarized signal light are subjected to beam collimation by the third 8-path lens array 32, the 8-path polarization maintaining fiber array 31 (Prot 2) end is output, thereby realizing the function of outputting 8 paths of signal light.
In this embodiment, it is noted that, in one manner, the interval between two adjacent channels of the first 8-channel lens array 7, the interval between two adjacent channels of the second 8-channel lens array 22, and the interval between two adjacent channels of the third 8-channel lens array 32 are 0.5mm.
In another embodiment, the interval between two adjacent channels of the first 8-channel lens array 7, the interval between two adjacent channels of the second 8-channel lens array 22, and the interval between two adjacent channels of the third 8-channel lens array 32 are 0.75mm.
It is noted that the system can be applied to industries such as automobiles as a vehicle-mounted product, and one of the vehicle-mounted products can be a laser radar detector. The laser radar detector inputs a single path of P polarized signal light from the Prot1 end, outputs 8 paths of signal light in different directions from the Prot2 end through a first optical path to detect external obstacles, and inputs a feedback signal light from the Prot2 end after one or more paths of signal light detect the obstacles and outputs the feedback signal light from the Prot3 end through a second optical path so as to acquire obstacle information.
While the principles and embodiments of the present invention have been described in detail in the foregoing application of the principles and embodiments of the present invention, the above examples are provided for the purpose of aiding in the understanding of the principles and concepts of the present invention and may be varied in many ways by those of ordinary skill in the art in light of the teachings of the present invention, and the above descriptions should not be construed as limiting the invention.
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| US6538815B1 (en) * | 2000-05-18 | 2003-03-25 | Avanex Corporation | Bi-directional optical circulator and applications thereof |
| US9103991B2 (en) * | 2005-09-08 | 2015-08-11 | Finisar Corporation | Multi-pole optical signal switch |
| CN102004364A (en) * | 2009-09-01 | 2011-04-06 | 上海伟钊光学科技有限公司 | Demodulation mode for realizing coherent light receiving |
| CN107870444A (en) * | 2017-10-27 | 2018-04-03 | 苏州伽蓝致远电子科技股份有限公司 | Utilize the multi-channel laser device multiplex optical module and device of multi-wavelength wave plate |
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| CN212873136U (en) * | 2020-06-24 | 2021-04-02 | 翔光光通讯器材（昆山）有限公司 | 1-division multi-path circulator array system |
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