CN216310318U - Folding type MXN port wavelength selection switch - Google Patents
Folding type MXN port wavelength selection switch Download PDFInfo
- Publication number
- CN216310318U CN216310318U CN202123096298.5U CN202123096298U CN216310318U CN 216310318 U CN216310318 U CN 216310318U CN 202123096298 U CN202123096298 U CN 202123096298U CN 216310318 U CN216310318 U CN 216310318U
- Authority
- CN
- China
- Prior art keywords
- liquid crystal
- cylindrical mirror
- transmission
- focus
- ports
- 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.)
- Active
Links
Images
Landscapes
- Liquid Crystal (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The utility model discloses a folding type MXN port wavelength selection switch. The utility model comprises the following components in sequence along the transmission direction of the light beam: the system comprises a one-dimensional single-mode fiber collimator array, a short-focus cylindrical mirror, a first long-focus cylindrical mirror, a reflective mirror, a transmission-type phase diffraction grating, a second long-focus cylindrical mirror, a liquid crystal spatial light modulator and a liquid crystal pattern loading control system; the utility model uses the same set of optical elements for the incident light and the emergent light by using a smart folding structure in the optical system, and the structure ensures that the input port and the output port of the optical signal are consistent in spatial arrangement, thereby saving space and improving the utilization rate of the ports; the working area of the liquid crystal spatial light modulator is improved in multiples by adopting the composite liquid crystal chip, and the number of the accommodated ports is greatly expanded; therefore, the adoption of the structure and the design can realize the great increase of the number of the M multiplied by N ports of the wavelength selective switch.
Description
Technical Field
The utility model relates to the field of optical communication and optical signal processing, in particular to a folding type MXN port wavelength selective switch.
Background
In recent years, the rising of technologies such as a 5G access network, multimedia services, artificial intelligence and the like promotes the continuous increase of the bandwidth demand of an optical network, and as the optical-to-electrical-to-optical conversion technology used by each switching node in the traditional optical communication network is limited by the electronic migration rate, the traditional optical communication network can generate electronic bottlenecks such as bandwidth limitation, slow response speed, clock offset, high power consumption and the like in the high-speed communication process and gradually cannot meet the huge increase of the switching capacity in the future communication network, the establishment of the next-generation wavelength-switching-based intelligent all-optical network is a necessary trend of developing optical access and electrical fallback in the future communication network. In the construction of an all-optical network, the wavelength selective switch is used as a core device of an all-optical switching node, the bandwidth resource of an optical fiber can be utilized to the maximum extent without the limitation of the response speed of an electric device, the throughput of signal transmission is greatly improved, and simultaneously signals with different rates, protocols, modulation frequencies and formats can be compatible and the transmission quality is ensured. Research and development results of over 10 years show that a Wavelength Selective Switch (WSS) is the only all-optical signal processing and switching device with a powerful signal processing function at present, has become an indispensable important basic device for fully-optical and intelligent modification of global optical networks currently and in the future, and has attracted wide attention of various research institutions and device suppliers in international scope.
A wavelength selective switch, which is an M × N port of a core device in an optical switching node, generally has M optical signal input ports and N optical signal output ports, and can implement a function of outputting any one or a group of wavelength signals in a port optical signal of the M input ports from any one or more ports of the N output ports. In recent years, major research institutions at home and abroad including companies such as Finisar, luminum, huashi and the like have brought wavelength selection switches for building M × N ports by using liquid crystal spatial light modulators into main research and development plans, but no commercialized wavelength selection switches for M × N ports exist so far, and the technical scheme of the wavelength selection switches for M × N ports faces key technical problems such as insufficient port number, complex optical path structure, large insertion loss and the like caused by size limitation of liquid crystal chips and mutual independence of input/output ports, and no satisfactory technical scheme and experimental result exist so far.
Disclosure of Invention
The utility model provides a folding type MXN port wavelength selection switch, aiming at solving the key technical problems of insufficient port quantity, complex optical path structure, large insertion loss and the like caused by size limitation of a liquid crystal chip and mutual independence of input/output ports in the existing WSS technical scheme of MXN ports.
The folding type MXN port wavelength selection switch of the present invention comprises: the folding type MXN port wavelength selective switch sequentially comprises the following components along the light beam transmission direction: the system comprises a one-dimensional single-mode fiber collimator array, a short-focus cylindrical mirror, a first long-focus cylindrical mirror, a reflective mirror, a transmission-type phase diffraction grating, a second long-focus cylindrical mirror, a liquid crystal spatial light modulator and a liquid crystal pattern loading control system; the one-dimensional single-mode fiber collimator array comprises M + N single-mode fiber collimators, all the single-mode fiber collimators are arranged into a one-dimensional array along the x-axis direction, the M single-mode fiber collimators serve as input ports, the N single-mode fiber collimators serve as output ports, and the light beam transmission direction of each input port and each output port is along the z-axis direction; the short-focus cylindrical mirror and the first long-focus cylindrical mirror are positioned on an xz plane, the z axis respectively passes through the short-focus cylindrical mirror and the first long-focus cylindrical mirror, and the short-focus cylindrical mirror and the first long-focus cylindrical mirror form an optical 4f system; the surface of the transmission type phase diffraction grating is divided into a first transmission area and a second transmission area which are identical and symmetrical along the central line of the transmission type phase diffraction grating, the central line of the transmission type phase diffraction grating is aligned with the generatrix of the first tele cylindrical mirror in the center, and the central line of the first transmission area is along the direction of the x axis; the central line of the surface of the transmission type phase diffraction grating is aligned with the bus of the second tele cylindrical mirror and the central line of the surface of the liquid crystal spatial light modulator in the middle; the liquid crystal chip plane and the reflector of the liquid crystal spatial light modulator are both arranged perpendicular to the yz plane; placing a reflector in front of a second transmission area of the transmission type phase diffraction grating, wherein the middle line of the reflector is along the x-axis direction, and the middle line of the reflector is aligned with the middle line of the second transmission area in a centered mode; dividing a liquid crystal chip of the liquid crystal spatial light modulator into M + N areas, wherein the M areas which are respectively in one-to-one correspondence with the M input ports are first reflection areas, the N areas which are respectively in one-to-one correspondence with the N output ports are second reflection areas, and both M and N are natural numbers which are more than or equal to 2; the liquid crystal spatial light modulator is connected to a liquid crystal pattern loading control system.
The liquid crystal spatial light modulator is formed by compounding a plurality of liquid crystal chips, the number of the liquid crystal chips is continuously expanded according to the number of required ports, and the surface of each liquid crystal chip is a two-dimensional pixel array; a specific phase gray scale pattern is loaded on the two-dimensional pixel array through the liquid crystal pattern loading control system, a diffraction effect is generated on light beams incident on corresponding pixels, and the incident light is deflected at a set angle through loading the specific phase gray scale pattern.
The short-focus cylindrical mirror adopts a cylindrical mirror with the focal length within 100 mm. The first long-focus cylindrical mirror and the second long-focus cylindrical mirror adopt cylindrical mirrors with the focal length larger than 50 mm.
Further, N is an even number, wherein, along the direction of the x axis, N/2 output ports are positioned above the M input ports, N/2 output ports are positioned below the M input ports, and the output ports are symmetrically distributed about the yz plane.
The utility model has the advantages that:
the utility model uses the same set of optical elements for the incident light and the emergent light by using a smart folding structure in the optical system, and the structure ensures that the input port and the output port of the optical signal are consistent in spatial arrangement, thereby saving space and improving the utilization rate of the ports; the working area of the liquid crystal spatial light modulator is improved in multiples by adopting the composite liquid crystal chip, and the number of the accommodated ports is greatly expanded; therefore, the adoption of the structure and the design can realize the great increase of the number of the M multiplied by N ports of the wavelength selective switch.
Drawings
Fig. 1 is a schematic diagram of device placement and light beam transmission of an embodiment of the folding mxn port wavelength selective switch of the present invention, in order to clearly show an optical signal transmission path, a dispersion effect of a transmissive phase diffraction grating is omitted in the diagram, and only a port switching principle when a plurality of ports emit a single-wavelength light beam respectively is shown;
fig. 2 is a diagram of different collimator port numbers and corresponding transmission-type phase diffraction gratings in a one-dimensional single-mode fiber collimator array, a partition condition on a liquid crystal spatial light modulator, and distribution areas of different wavelength light beams on the liquid crystal spatial light modulator according to an embodiment of the folding mxn port wavelength selective switch of the present invention;
FIG. 3 is a schematic diagram of the transmission of different wavelength beams in the yz plane for one embodiment of the folded MXN port wavelength selective switch of the present invention;
FIG. 4 is a schematic diagram of the angular deflection of a liquid crystal spatial light modulator for the first deflection and the second deflection of a light beam according to an embodiment of the folded M × N port wavelength selective switch of the present invention;
fig. 5 is a schematic diagram of transmission of light beams with different wavelengths in a yz plane according to an embodiment of the folding mxn port wavelength selective switch of the present invention, in order to clearly show the transmission path of the optical signals, the light signals with different wavelengths only show the transmission path of the optical axis, and the reflective liquid crystal spatial light modulator is represented as transmissive, while ignoring the incident angle and the diffraction angle of the transmissive phase diffraction grating;
FIG. 6 is a schematic diagram of the size transformation of different wavelength light beams in the yz plane of an embodiment of the folded MXN port wavelength selective switch of the present invention, wherein for the sake of clear representation of the optical signal transmission path, the reflective liquid crystal spatial light modulator has been represented as transmissive, while ignoring the incident and diffraction angles of the transmissive phase diffraction grating, the light beams of different wavelengths all show the corresponding width variation;
FIG. 7 is a schematic diagram of port switching in the xz plane of an embodiment of the folded M × N port wavelength selective switch of the present invention, wherein for the sake of clarity of the optical signal transmission path, the reflective liquid crystal spatial light modulator has been represented as transmissive, and each light beam represents the transmission path only with the optical axis, while ignoring the incident and diffracted angles of the transmissive phase diffraction grating;
fig. 8 is a schematic diagram of beam size transformation in the xz plane of an embodiment of the folding mxn port wavelength selective switch of the present invention, and for the sake of clarity of showing the optical signal transmission path and the corresponding size change, the reflective liquid crystal spatial light modulator has been represented as transmissive while ignoring the incident and diffracted angles of the transmissive phase diffraction grating.
Detailed Description
The utility model will be further elucidated by means of specific embodiments in the following with reference to the drawing.
As shown in fig. 1 to 3, the folding mxn port wavelength selective switch of the present embodiment includes, in order along the beam transmission direction: the system comprises a one-dimensional single-mode fiber collimator array 1, a short-focus cylindrical mirror 2, a first long-focus cylindrical mirror 3, a reflective mirror 4, a transmission-type phase diffraction grating 5, a second long-focus cylindrical mirror 6, a liquid crystal spatial light modulator 7 and a liquid crystal pattern loading control system 8; the one-dimensional single-mode fiber collimator array 1 comprises M + N single-mode fiber collimators, all the single-mode fiber collimators are arranged into a one-dimensional array along the x-axis direction, and the M single-mode fiber collimators are used as input ports and are respectively a first input port P to an M input port P1、 P2.....PMN single-mode fiber collimators serving as output ports are respectively a first output port U to an Nth output port U1、U2.....UNThe transmission direction of the light beams of each input port and each output port is along the direction of the z axis; the short-focus cylindrical mirror 2 and the first long-focus cylindrical mirror 3 are positioned on an xz plane, the z axis respectively passes through the short-focus cylindrical mirror 2 and the first long-focus cylindrical mirror 3, and the short-focus cylindrical mirror 2 and the first long-focus cylindrical mirror 3 form an optical 4f system; the surface of the transmissive phase diffraction grating 5 is divided equally into two identical and symmetrical first transmission regions S along the middle line thereof1And a second transmission region S2The central line of the transmission-type phase diffraction grating 5 is along the x-axis direction, the central line of the first transmission area is aligned with the generatrix of the first tele cylindrical mirror 3 in the center, and the central line of the first transmission area is along the x-axis direction; transmissive typeThe central line of the surface of the phase diffraction grating 5 is aligned with the bus of the second tele cylindrical mirror 6 and the central line of the surface of the liquid crystal spatial light modulator 7 in the center; the liquid crystal chip plane of the liquid crystal spatial light modulator 7 and the reflector 4 are both arranged perpendicular to the yz plane; placing a reflective mirror 4 in front of a second transmission area of the transmission type phase diffraction grating 5, wherein the middle line of the reflective mirror 4 is along the x-axis direction, and the middle line of the reflective mirror 4 is aligned with the middle line of the second transmission area in the middle; the liquid crystal spatial light modulator 7 is divided into M + N regions on the liquid crystal chip, wherein the M regions corresponding to the M input ports one to one are first reflection regions marked as T1、 T2.....TMAnd N areas corresponding to the N output ports one by one are second reflection areas marked as K1、K2.....KNIn this embodiment, M is 5, N is 10, and the first and second tele cylindrical mirrors 6 are double cemented cylindrical mirrors; the liquid crystal spatial light modulator 7 is connected to a liquid crystal pattern loading control system 8.
The implementation method of the folded mxn port wavelength selective switch of the present embodiment, as shown in fig. 1 to 8, includes the following steps:
1) building a light path;
2) an incident beam with continuous wavelength is transmitted from a first input port P in 5 input ports M in the one-dimensional single-mode fiber collimator array 11Inputting;
3) first input port P1Outputting a Gaussian beam transmitted along the z axis, wherein the optical axis of the Gaussian beam passes through a bus of a short-focus cylindrical mirror 2 and a bus of a first long-focus cylindrical mirror 3, expanding and collimating the incident beam along the y axis direction into a parallel beam along the y axis direction by adjusting the focal lengths of the short-focus cylindrical mirror 2 and the first long-focus cylindrical mirror 3, and the short-focus cylindrical mirror 2 and the first long-focus cylindrical mirror 3 enlarge the size of the incident beam in the y axis direction and have no effect on the size of the incident beam in the x axis direction;
4) the incident light beam then reaches the first transmission region S of the transmissive phase diffraction grating 51In the first transmission region S of the transmission type phase diffraction grating 51Appears as an elliptical spot with the y-axis as the major axis; transmission type phase diffraction grating 5 is insertedThe first dispersion is carried out on the outgoing beam, the diffraction angles of the beams with different wavelengths are different when the beams pass through the transmission-type phase diffraction grating 5, the beams with different wavelengths are separated from the space, and the beams with different wavelengths are dispersed to one side of the second tele cylindrical mirror 6 at different angles along the xz plane of the respective propagation direction;
5) the second long-focus cylindrical mirror 6 converts the light beams with different wavelengths and different diffraction angles after dispersion into light beams with optical axes which are transmitted in parallel, focuses the light beams with single wavelength to the liquid crystal spatial light modulator 7, deflects the whole light beams transmitted in parallel to the central line of the liquid crystal spatial light modulator 7, narrows the elliptical light beam with the y axis as the major axis in the light beams to an elliptical light beam with the x axis as the major axis, namely focuses the light beams with different wavelengths, and projects the light beams with different wavelengths to the first region T of the corresponding first reflection region on the liquid crystal chip respectively1Different pixel regions on;
6) different wavelength lambda in each beam1、λ2、λ3、λ4… are transmitted in parallel to each other and projected to the first regions T of the first reflection regions corresponding to the liquid crystal spatial light modulators 7 respectively1In different pixel regions, as shown in fig. 2, the included angles between the beams with different wavelengths in the incident beam and the xz plane are all transverse deflection included angles θ; respectively in the first reflection region T of the liquid crystal spatial light modulator 7 by the liquid crystal pattern loading control system 81Loading a set phase gray-scale image on pixel areas corresponding to different wavelengths, so that light reflected on the corresponding pixel areas returns to one of N areas of a second reflection area after being reflected by a second tele cylindrical mirror 6 and a transmission type phase diffraction grating 5 to a reflective mirror 4, wherein the area corresponds to one of N output ports; controlling the first to fourth wavelengths lambda by loading different phase gray maps1、λ2、λ3And λ4Respectively generate different included angles alpha with the yz plane1、α2、α3And alpha4The first deflection of the incident beam is realized, and the included angles between all the reflected lights with different wavelengths and the xz plane are still the transverse deflection clampsAngle θ, as shown in FIG. 4;
7) the liquid crystal spatial light modulator 7 realizes the first deflection of the incident beam and simultaneously converts the divergence state of the incident beam on an xz plane along the x axis into the convergence state along the x axis, so as to realize the first conversion of the beam, the position of the reflector 4 is a convergence focal plane, and the beam continues to diverge along the x axis after converging along the x axis at the position of the reflector 4;
8) the light beams with different wavelengths in the incident light beams are deflected for the first time and then return to the other side, which is symmetrical to the incident light beams, of the second tele cylindrical mirror 6 along a bus, the transverse deflection included angle theta between the reflected light beams and the xz plane disappears after passing through the second tele cylindrical mirror 6, and the second tele cylindrical mirror 6 converges the light beams with different wavelengths in the light beams to the second transmission area S of the transmission type phase diffraction grating 52And then from the second transmission region S of the transmission type phase diffraction grating 52First inverse dispersion is achieved and then reflected by the mirror 4; because the reflective mirror 4 is placed perpendicular to the yz plane, the included angle between the light beam reflected by the reflective mirror 4 and the yz plane is the same as the deflection angle between the light beam with the wavelength and the yz plane generated by the first deflection, as shown in fig. 7; 9) the light beam reflected by the mirror 4 passes through the second transmission region S of the transmissive phase diffraction grating 5 again2Performing a second dispersion, followed by first to fourth wavelengths lambda1、λ2、λ3And λ4After passing through the second tele cylindrical mirror 6, the light beams are projected to the second, sixth, seventh and eighth areas K of the second reflection area of the liquid crystal spatial light modulator 7 respectively2、K6、 K7And K8At this time, the second tele cylindrical lens 6 enables the light beams with different wavelengths to be transmitted in parallel and generate a transverse deflection included angle theta with the xz plane;
10) due to the second, sixth, seventh and eighth areas K of the second reflective area of the liquid crystal spatial light modulator 7 by the liquid crystal pattern loading control system 82、K6、K7And K8The upper loading of the set phase gray scale map can enable the reflected light beam to generate different included angles with the yz plane, so that when the light beam returns to the second reflection area of the liquid crystal spatial light modulator 7 after second dispersion, the liquid crystal space is controlledThe inter-light modulator 7 loads a set phase gray scale image on a pixel area corresponding to the corresponding wavelength, so that the light beam realizes the second deflection, and the second deflection enables the first wavelength lambda to the fourth wavelength lambda to1、λ2、λ3And λ4And the different included angles between the beams and the yz plane disappear, and the optical axis of the beam or beams with the same wavelength after the second deflection is parallel to the optical axis of the beam with the same wavelength in the beams before the first deflection, and the light with the wavelength corresponding to the non-parallel beam is discarded; in the case of a uniform wavelength, the light beam after the second deflection is shifted in the x-axis direction from the light beam before the first deflection, and thus passes through the second, sixth, seventh, and eighth regions K of the second reflection region2、K6、K7And K8The first to fourth wavelengths after the second deflection are lambda1、λ2、λ3And λ4Can return to the respective second, sixth, seventh and eighth output ports U2、U6、U7And U8；
11) The liquid crystal spatial light modulator 7 realizes the second deflection of the incident light beam and simultaneously converts the divergence state of the incident light beam on an xz plane along the x axis into the convergence state along the x axis, so that the second conversion of the light beam is realized, the position of the output port of the one-dimensional single-mode fiber collimator array is a convergence focal plane, the two times of light beam conversion of the liquid crystal spatial light modulator 7 is regarded as an optical 4f system, and the plane where the reflector 4 is located is the 2f position of the optical 4f system;
12) the returned light beams pass through a second long-focus cylindrical mirror 6 and then are transmitted to a first transmission area of a transmission type phase diffraction grating 5 for second inverse dispersion, and then return to any one or more set ports in the corresponding N output ports after passing through the first long-focus cylindrical mirror 3 and the buses of the short-focus cylindrical mirror 2 in sequence; therefore, port switching of any wavelength channel and any bandwidth optical signal in the incident light beam is realized by utilizing the two deflection reflections of the reflecting mirror 4 and the liquid crystal spatial light modulator 7 to the incident light beam.
Finally, it is noted that the disclosed embodiments are intended to aid in further understanding of the utility model, but those skilled in the art will appreciate that: various substitutions and modifications are possible without departing from the spirit and scope of the utility model and the appended claims. Therefore, the utility model should not be limited to the embodiments disclosed, but the scope of the utility model is defined by the appended claims.
Claims (5)
1. A folded mxn port wavelength selective switch, comprising: the folding type MXN port wavelength selective switch sequentially comprises the following components along the light beam transmission direction: the system comprises a one-dimensional single-mode fiber collimator array, a short-focus cylindrical mirror, a first long-focus cylindrical mirror, a reflective mirror, a transmission-type phase diffraction grating, a second long-focus cylindrical mirror, a liquid crystal spatial light modulator and a liquid crystal pattern loading control system; the one-dimensional single-mode fiber collimator array comprises M + N single-mode fiber collimators, all the single-mode fiber collimators are arranged into a one-dimensional array along the x-axis direction, the M single-mode fiber collimators serve as input ports, the N single-mode fiber collimators serve as output ports, and the light beam transmission direction of each input port and each output port is along the z-axis direction; the short-focus cylindrical mirror and the first long-focus cylindrical mirror are positioned on an xz plane, the z axis respectively passes through the short-focus cylindrical mirror and the first long-focus cylindrical mirror, and the short-focus cylindrical mirror and the first long-focus cylindrical mirror form an optical 4f system; the surface of the transmission type phase diffraction grating is divided into a first transmission area and a second transmission area which are identical and symmetrical along the central line of the transmission type phase diffraction grating, the central line of the transmission type phase diffraction grating is aligned with the generatrix of the first tele cylindrical mirror in the center, and the central line of the first transmission area is along the direction of the x axis; the central line of the surface of the transmission type phase diffraction grating is aligned with the bus of the second tele cylindrical mirror and the central line of the surface of the liquid crystal spatial light modulator in the middle; the liquid crystal chip plane and the reflector of the liquid crystal spatial light modulator are both arranged perpendicular to the yz plane; placing a reflector in front of a second transmission area of the transmission type phase diffraction grating, wherein the middle line of the reflector is along the x-axis direction, and the middle line of the reflector is aligned with the middle line of the second transmission area in a centered mode; dividing a liquid crystal chip of the liquid crystal spatial light modulator into M + N areas, wherein the M areas which are respectively in one-to-one correspondence with the M input ports are first reflection areas, the N areas which are respectively in one-to-one correspondence with the N output ports are second reflection areas, and both M and N are natural numbers which are more than or equal to 2; the liquid crystal spatial light modulator is connected to a liquid crystal pattern loading control system.
2. The folded mxn port wavelength selective switch of claim 1, wherein the liquid crystal spatial light modulator is formed by combining a plurality of liquid crystal chips, the number of liquid crystal chips is continuously expanded according to the required number of ports, and the surface of each liquid crystal chip is a two-dimensional pixel array.
3. The folding mxn port wavelength selective switch of claim 1, wherein the short-focus cylindrical mirror is a cylindrical mirror with a focal length within 100 mm.
4. The folding mxn port wavelength selective switch of claim 1, wherein the first and second tele cylindrical mirrors employ cylindrical mirrors having a focal length greater than 50 mm.
5. The folded M x N port wavelength selective switch of claim 1, wherein N is an even number, wherein N/2 output ports are located above M input ports and N/2 output ports are located below M input ports along the x-axis direction, and the output ports are symmetrically distributed about the yz plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123096298.5U CN216310318U (en) | 2021-12-10 | 2021-12-10 | Folding type MXN port wavelength selection switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123096298.5U CN216310318U (en) | 2021-12-10 | 2021-12-10 | Folding type MXN port wavelength selection switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216310318U true CN216310318U (en) | 2022-04-15 |
Family
ID=81084048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123096298.5U Active CN216310318U (en) | 2021-12-10 | 2021-12-10 | Folding type MXN port wavelength selection switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216310318U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024066614A1 (en) * | 2022-09-27 | 2024-04-04 | 华为技术有限公司 | Optical modulation device, wavelength selective switch, and optical communication device |
-
2021
- 2021-12-10 CN CN202123096298.5U patent/CN216310318U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024066614A1 (en) * | 2022-09-27 | 2024-04-04 | 华为技术有限公司 | Optical modulation device, wavelength selective switch, and optical communication device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6072923A (en) | Optical switching, routing, and time delay systems using switched mirrors | |
| JP2001505668A (en) | Error-tolerant optical route changeover switch | |
| CN103748511A (en) | Optical switch | |
| KR100478339B1 (en) | Contention free global interconnection | |
| CN105892083B (en) | The optical routing method and apparatus for controlling optical signal, selecting wavelength | |
| EP0323075B1 (en) | An optical switch | |
| CN216310318U (en) | Folding type MXN port wavelength selection switch | |
| CN105739026A (en) | High-port-number wavelength selection switch | |
| EP1239309B1 (en) | Optical switch matrix | |
| EP0397369B1 (en) | Optical apparatus for combining light beam arrays having different wavelengths | |
| EP0397368B1 (en) | Method of controlling a space-division switching network | |
| CN103969748A (en) | Wavelength selection switch based on DLP | |
| US10634850B2 (en) | Large-capacity optical fiber switch device and the program-controlled exchange method | |
| TW573148B (en) | All-optical interconnect utilizing polarization gates | |
| Kirk et al. | A compact and scalable free-space optical crossbar | |
| CN107976748B (en) | Multi-port wavelength selective switch based on polarization beam splitting double diffraction grating and method thereof | |
| CN114185135B (en) | Implementation method of folding type MXN port wavelength selective switch | |
| CN218630272U (en) | Folding type MXN port wavelength selection switch | |
| CN115793153A (en) | Folding type MXN port wavelength selection switch | |
| CN210894900U (en) | Wavelength selective switch based on liquid crystal chip | |
| US7187820B1 (en) | Optical time delay system | |
| US6545792B2 (en) | Polarization independent non-blocking all-optical switching device | |
| Fracasso et al. | Performance assessment of a liquid crystal multichannel photonic space-switch | |
| WO2023145298A1 (en) | Optical switch and switching method | |
| WO2024001533A1 (en) | Wavelength selective device and corresponding switching device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |