CN112987185A - Control method of working area multiplexing type wavelength selection switch device - Google Patents
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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
- G02B6/35—Optical coupling means having switching means
- G02B6/354—Switching arrangements, i.e. number of input/output ports and interconnection types
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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
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/2938—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
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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
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/2938—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
- G02B6/29386—Interleaving or deinterleaving, i.e. separating or mixing subsets of optical signals, e.g. combining even and odd channels into a single optical signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0202—Arrangements therefor
- H04J14/021—Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM]
- H04J14/0212—Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM] using optical switches or wavelength selective switches [WSS]
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Abstract
The invention provides a control method of a working area multiplexing type wavelength selective switch device, which comprises an input/output optical fiber array, a dispersion unit, a beam control device and a relevant optical lens or reflector; the input/output optical fiber array forms an input port and an output port of two or more Wavelength Selective Switches (WSS); the incident light beams of the two or more Wavelength Selective Switches (WSS) are incident to different regions of the dispersion unit at substantially the same incident angle. A plurality of wavelength selective switch systems are integrated in the structure, wherein two or more wavelength selective switches share the same working area in the beam control device, and the use efficiency of the beam control device is improved.
Description
Technical Field
The invention relates to a wavelength division multiplexing communication network, in particular to a wavelength selective switch of a multiplexing type in a working area.
Background
Wavelength division multiplexing (wavelength division multiplexing-WDM) technique: the technology loads multiple paths of signals to different wavelengths in an optical fiber communication network and transmits the signals in parallel in the same optical fiber.
Wavelength selective switching-WSS (wavelength selective switching-WSS) technology: a WSS typically has one input port and N output ports. The input port receives a multiplexed wavelength division multiplexed signal. The WSS can switch any wavelength channel received by an input port to any target output port. The technology greatly improves the reconfigurability of the optical fiber communication network, reduces the operation cost, and becomes a core technology of the modern optical fiber communication network. In the actual use process, the input port and the output port can be exchanged, that is, one WSS has N input ports and 1 output port.
1 × N space optical switch technology (1 × N space switch-SS) technology: the 1 × N space optical switch has 1 input port and N output ports. The optical switch can switch all optical signals received by the input port to any output port. Unlike WSS, this optical switch does not have a wavelength selection function.
Reconfigurable full optical add/drop multiplexer (reconfigurable optical add/drop multiplexer-ROADM) technology: ROADMs are the core control units of modern fiber optic communication networks. A ROADM is typically composed of multiple WSS cascades. A basic framework of a two-dimensional ROADM is characterized in that 4 1 xN WSS pairs are cascaded at the transmission end of the ROADM. In this arrangement, any wavelength channel of an input in any dimension can be switched to an output port of any dimension. The upstream and downstream ends of the ROADM can intercept (drop) wavelength channels of a ROADM transmission end to a local downstream port for local processing; or add (add) a new wavelength channel from local to ROADM transmission. The dimensions of a ROADM have extensibility. When a new dimension needs to be added, only a new WSS needs to be added in the ROADM, and the newly added WSS are correspondingly connected with the existing WSS and the upstream and downstream ends. When the number of the uplink or downlink ports needs to be expanded, a new uplink and downlink unit can be added, so that the effect of increasing the number of the ports is achieved. Currently, 8-dimensional and 16-dimensional ROADMs are the mainstream applications. The demand for 32-dimensional ROADMs is expected to increase in the future. The number of uplink and downlink ports also typically exceeds 100.
Wavelength cross connector (wavetength cross connect-WXC) technology: the add/drop function of ROADM may be implemented by WXC technology. The WXC is provided with N input ports and M output ports, and any wavelength channel can be switched between the input ports and the output ports. WXC is also called nxmwss. The WXC is an advanced WXC framework, and is formed by cascading N1 × M WSS and M1 × N optical switches. Under the arrangement, the WXC can realize colorless, directionless and conflict-free wavelength channel add/drop, for example, interception (drop), an arbitrary wavelength channel (coloronless) of a ROADM transmission end can be distributed to an arbitrary downlink port (directionless), two channels with the same wavelength in different dimensions can be intercepted simultaneously (contentionless), the WXC can be formed by pairing and cascading WSS and SS, and the SS can also be integrated into the optical design of the WSS to form integrated WXC equipment.
The introduction of the above background art shows that a large number of WSSs are required to be used in ROADM systems (especially high-dimensional ROADM systems), and increasing the integration level of the WSSs will greatly reduce the cost and volume of the ROADM systems.
The optical architecture of the existing WSS system is mainly composed of a 2f fourier optical system and a 4f imaging optical system. The two optical systems pass through PoAnd (4) surface connection. In some designs, the 2f fourier optics can be integrated into the 4f imaging optics, achieving the same WSS functionality.
The dispersion unit in the system may be a diffraction grating (diffraction grating), a prism (prism), or a diffraction grating prism (grism).
The different active areas of the beam steering device can be independently controlled to deflect a beam incident on the area. Common beam steering devices include liquid crystal on silicon-on-LCOS (liquid crystal on silicon), micro-electromechanical system-MEMS (micro-electromechanical system-MEMS) devices, liquid crystal devices, and the like. Currently, a silicon-based liquid crystal device is a beam steering device commonly used in WSS systems.
A dispersive unit included in the 4f imaging system can direct spots of different wavelengths to different operating regions of the beam steering device. Different deflection angles can be introduced to different wavelength channels by controlling the setting of the corresponding area of the beam control device. The deflection angle is typically along the port direction, but may also be along the dispersion direction. The 4f imaging system projects this deflection angle back to PoAnd (5) kneading. And a Fourier lens in the 2f Fourier optical system converts the deflection angle into displacement in the direction of the port, so that the light spot of the wavelength channel is coupled to the corresponding target emergent port.
The first prior art has the following defects: in principle, the 2f Fourier optical system can be further split, and the purpose of realizing more WSSs in the optical system is achieved. However, liquid crystal on silicon devices have a limited number of pixels to be integrated as the most mainstream WSS beam steering devices. Integrating more WSSs necessarily results in a reduced number of pixels to which a single WSS is assigned. And the number of pixels to which a single WSS is assigned determines the number of ports that can be achieved by the same WSS. Therefore, the number of WSSs that can be integrated in one optical system is limited given the number of ports and the number of pixels of the liquid crystal on silicon device.
It is known from the introduction of the background art that ROADM systems require the use of a large number of WSSs, and particularly when a huge number of up/down ports are required at the upstream and downstream ends, a plurality of WXC systems are required to implement the number of up/down ports required by the system. Multiple WSSs are included in a single WXC system. Therefore, the volume and the cost of the existing WXC system are large, and the proportion of the volume and the cost of the existing WXC system to the total volume and the cost of the ROADM system is also large, so that the further popularization and application of the ROADM technology are limited.
Disclosure of Invention
The technical problem is as follows: the object of the present invention is to provide an operation region multiplexing type wavelength selective switch. In the scheme, a plurality of WSSs commonly use the same working area in the beam control device, and any wavelength channel allocation conflict cannot be caused in the ROADM system, so that the integration level of the WXC system is greatly improved, and the purposes of reducing cost and reducing volume are achieved.
The technical scheme is as follows: the invention is a control method of the multiplexing wavelength selective switch device of the working area, the wavelength selective switch device is formed by an input/output fiber array, a chromatic dispersion unit, a beam control device and relevant optical lens or reflector; the input/output optical fiber array forms an input port and an output port of each of two or more wavelength selective switches; the incident light beams of the two or more wavelength selective switches are incident to different areas of the dispersion unit at approximately the same incident angle; the incident spectrums of the several wavelength selective switches are distributed to the same working area in the beam control device after passing through the second imaging lens; the incident light beams with the same wavelength of the several wavelength selective switches share the same working area in the beam control device, but the incident light beams from different wavelength selective switches have different incidence angles relative to the beam control device; the corresponding areas of the beam steering devices can be controlled independently to achieve beam deflection.
The dispersion unit disperses the light beams of each channel to different directions according to the wavelength, and the optical element with the focusing characteristic further distributes the light beams of each wavelength channel to different working areas of one beam control device; wherein channels from two or more input ports having the same center wavelength are assigned to the same active area of the beam steering device; different working areas of the beam control device can be independently controlled, deflection of light beams in corresponding areas is achieved, and then each wavelength channel is switched to a corresponding target emergent port.
In the wavelength selective switch, a plurality of ports are arranged in the dispersion direction and respectively correspond to input ports of WSS 1.1-1.3 of the wavelength selective switch, the three incident ports are positioned at the front focal plane of the Fourier lens, and after a 2f system is formed by the Fourier lens, three incident beams are superposed on the rear focal plane of the Fourier lens.
The incident light beams of the wavelength selection switch have different incident angles in the dispersion direction at a focal plane, the focal plane is also an object plane of a 4f system formed by the first imaging lens, the dispersion unit and the second imaging lens, namely the focal plane is superposed with the front focal plane of the first imaging lens, and the dispersion unit is positioned at the back focal plane of the first imaging lens.
The 4f system, which is composed of the first imaging lens, the dispersion unit, and the second imaging lens, has an object plane as a fiber port plane and an image plane as a dispersion unit plane, and projects light beams incident from three different WSSs to different regions of the dispersion unit along a dispersion direction, i.e., a y-axis, but the incident angles between the three WSSs and the dispersion unit are substantially the same.
The dispersion unit is located at the front focal plane of the imaging lens, and the frequency spectrums of the three incident ports are distributed to the same working area in the beam control device after passing through the second imaging lens, so that light spot distribution is realized.
After reflection by the beam control device, the light beams of the WSS 1.1-1.3 of the wavelength selective switch pass through the 4f system formed by the first imaging lens, the dispersion unit and the second imaging lens again, coincide again on the focal plane, and have different incident angles in the dispersion direction or the port direction, and the fourier lens further converts the angles of the light beams into displacements of the light beams and the optical axis, so that the output ports of the WSS 1.1-1.3 of the wavelength selective switch also have displacements from the optical axis in the dispersion direction or the port direction.
The beam control device divides N rows of working areas in the direction of the port, and each row of working areas corresponds to one group of WSS.
The Fourier lens, the first imaging lens and the second imaging lens are all transmission lenses, or a reflecting mirror with curvature is used for playing the same role.
The working wavelength range of the working area multiplexing type wavelength selection switch device is generally located in a communication C wave band 1528 nm-1570 nm or an L wave band 1571 nm-1611 nm, or the working area multiplexing type wavelength selection switch device covers the C wave band and the L wave band at the same time.
Has the advantages that: the invention enables a plurality of WSSs to share the same working area in the beam control device, and does not introduce wavelength channel allocation conflict at the uplink and downlink ends of the ROADM, thereby effectively improving the use efficiency of the beam control device and greatly reducing the cost and the volume of the WXC system.
The key technical point is a design scheme of a multiplex wavelength selective switch in a working area: in the traditional WSS/WXC scheme, each WSS needs to use different working areas of a beam control device, so that the conflict of wavelength channel allocation is avoided. The invention provides a design scheme of a multiplex wavelength selective switch of a working area, wherein a plurality of WSSs share the same working area of a beam control device, and wavelength channel allocation conflict cannot be introduced at the uplink and downlink ends of a ROADM.
Drawings
Figure 1 is an optical framework of a WSS in the dispersion direction,
figure 2 is an optical architecture of the integrated WSS in the port direction,
figure 3 is a method of boosting the number of downstream ports by multiple WXCs,
figure 4 is a LCOS surface wave long channel spot distribution in an operating area multiplexed WSS,
figure 5 is an optical framework in the dispersion direction of a working area multiplexing-type WSS,
figure 6 is a port distribution in a working area multiplexing-type WSS,
fig. 7 is a basic optical framework in the dispersion direction of the working area multiplexing-type WSS.
The figure shows that: the device comprises a fiber collimation array 1, a wavelength selection switch WSS, a Fourier lens 2, a first imaging lens 3, a dispersion unit 4, a second imaging lens 5, a beam control device 6 and a first wavelength channel lambda1A second wavelength channel lambda2A third wavelength channel lambda3Focal plane Po
Detailed Description
The 2f and 4f optical systems are terms of art, and in general, a 2f optical system has a lens with an object plane and an image plane near the front focal plane and the back focal plane of the lens, respectively. In the optical system shown in fig. 3, the fourier lens constitutes a typical 2f system, with the fiber collimating array near the object plane of the lens and the Po plane at its image plane. The 2f system functions to focus an image of the object plane to the image plane. A 4f optical system typically consists of two lenses. The distance between the two lenses is the sum of the focal lengths of the two lenses, the distance between the object plane and the first lens is equal to the focal length of the first lens, and the distance between the image plane and the second lens is equal to the sum of the focal lengths of the two lenses. In the system shown in fig. 3, the imaging lenses 1 and 2 form a 4f system with an object plane PoAnd the image plane is a beam control device plane. The 4f system functions to project an image of the object plane to the image plane.
In a reconfigurable all-optical add-drop multiplexer (ROADM) system as shown in fig. 3, two independent wavelength cross-connect (WXC) systems implement 2 × 24 ═ 48 downstream ports. Wherein WSS1.1 and WSS 1.2 use two different operating regions in the beam steering device in two separate WSS systems. Careful analysis of the ROADM framework may find that both WSS1.1 and WSS 1.2 are connected to the input WSS at dimension 1, and therefore any wavelength channel can only be allocated to one of WSS1.1 and WSS 1.2 at a particular time. I.e. WSS1.1 and WSS 1.2 cannot receive one and the same wavelength channel at the same time.
In the example given in fig. 4, WSS 1.1-1.3 are all connected to the input WSS at dimension 1 and share the same piece of active area in the beam steering device. Irrespective of the first wavelength channel lambda1The light spot of the WSS is distributed to one working area of the beam control device. The WSS will not couple the first wavelength channel λ due to the input at dimension 11Any two of the WSSs 1.1-1.3 are simultaneously allocated, so that although the three WSSs share the same working area in the beam steering device, no wavelength channel allocation conflict is caused.
In order to realize the functions, the invention provides a novel WSS/WXC design structure. The structure is composed of an input/output fiber array, a dispersion unit, a beam control device and related optical lenses or mirrors. The input/output fiber arrays constitute the input and output ports of each WSS integrated in the system. The incident beams of two or more WSSs integrated in the system are incident on different areas of the dispersive unit at substantially the same angle of incidence. After passing through a 2f optical system, the incident spectra of several WSSs are distributed to the same piece of working area in the beam steering device. The incident beams of several WSSs at the same wavelength will share the same working area in the beam steering device, but there will be different angles of incidence of the incident beams from different WSSs with respect to the beam steering device.
The optical architecture shown in fig. 5 can achieve the above-described functions. In contrast to the conventional architecture (fig. 1), in the architecture of fig. 5, there are multiple ports in the dispersion direction, corresponding to the input ports of WSS 1.1-1.3, respectively. The three incident ports are positioned at the front focal plane of the Fourier lens in the figure, and the incident beams of the three incident ports pass through the Fourier lens to form a 2f system and then are positioned at the back focal plane P of the Fourier lensoThe surfaces are overlapped. But three incident beams are at PoThe facets have different angles of incidence in the direction of dispersion.PoThe plane is also the object plane of the 4f system formed by the imaging lens 1, the dispersive unit and the imaging lens 2, i.e. PoThe face coincides with the front focal plane of the imaging lens 1. The dispersive unit is located at the back focal plane of the imaging lens 1. It can be seen that the fourier lens and the imaging lens 1 in this system actually form a 4f imaging system, the object plane of which is the fiber port plane and the image plane of which is the dispersive element plane. The 4f system projects beams incident from three different WSSs to different regions of the dispersion unit in the dispersion direction (y-axis), but their incident angles with the dispersion unit are approximately the same. Since the dispersion unit is located at the front focal plane of the imaging lens, and the spectrum imaging lenses 2 of the three incident ports are allocated to the same working area in the beam control device, the light spot distribution as shown in fig. 4 is realized. Reflected by the beam control device, the light beams of the WSS 1.1-1.3 pass back through the 4f system consisting of the imaging lens 1, the dispersion unit and the imaging lens 2 again and are reflected again at the position PoThe planes coincide and have different angles of incidence in the dispersion direction. The fourier lens further converts the angle of the beam into a displacement of the beam from the optical axis in the direction of dispersion. Thus, the output ports of WSS 1.1-1.3 are also displaced from the optical axis in the dispersion direction. The optical architecture in the direction of the system ports is identical to that of fig. 2. Thus, the input port distribution of the system is shown in fig. 6.
It should be noted that in the present design, the optical path between the fiber array and the dispersion unit is not limited to the 4f system design given in this example. If the 4f system is removed, the three beams of incident light can be ensured to be incident to different areas of the dispersion unit at the same incident angle, and the purpose of multiplexing the working area of the beam deflection device is further achieved. The optical frame between the dispersion unit and the beam control device in the dispersion direction needs to follow the 2f optical system principle, that is, the dispersion unit and the beam control device are respectively positioned on the front focal plane and the rear focal plane of the imaging lens 2.
The optical architecture in the port direction still divides the beam steering device into N rows of working areas in the port direction, each row corresponding to a set of WSSs, along the design scheme given in fig. 2.
It should be noted that in the present invention, the fourier lens and the imaging lens 1-2 in the system are all transmissive lenses. A mirror with curvature can be used in the actual design process to do the same.
The working wavelength range in the design is generally located in a C-band (1528 nm-1570 nm) or an L-band (1571 nm-1611 nm) of communication, or covers the C-band and the L-band by colleagues. But the operating wavelength range is not limited thereto.
In the following design example, the operating wavelength range of the system is assumed to be the C-band. The optical architecture of the system in the dispersion direction is shown in fig. 7, and the optical architecture in the port direction follows the principles of fig. 6. The dispersive power of the dispersive unit is generally 0.2deg/nm to 0.5 deg/nm. The effective working area of the beam steering device is typically between 10mm and 20mm in dimension along the dispersion direction. Therefore, the focal length of the imaging lens 2 is generally in the range of 40mm to 100 mm. The focal length of the imaging lens 1 generally coincides with the imaging lens 2. But may also be different. The focal length of the fourier lens in the system is typically between 25 mm-80 mm, depending on the port number requirements of a single WSS. The fiber port spacing is typically between 80um and 500 um. The incident gaussian beam waist radius of a fiber collimating array is typically 1/3 or less for port spacing to ensure isolation between adjacent ports.
Claims (10)
1. A control method of a wavelength selective switch device of a multiplexing type of working area is characterized in that the wavelength selective switch device is composed of an input/output optical fiber array, a dispersion unit, a beam control device and related optical lenses or reflectors; the input/output optical fiber array forms an input port and an output port of two or more Wavelength Selective Switches (WSS); the incident light beams of the two or more Wavelength Selective Switches (WSS) are incident to different areas of the dispersion unit (4) at substantially the same incident angle; the incident spectra of the several Wavelength Selective Switches (WSS) are distributed to the same working area in the beam steering device (6) after passing through the second imaging lens (5); the incident beams of the several Wavelength Selective Switches (WSS) with the same wavelength will share the same working area in the beam steering device (6), but the incident beams from the different Wavelength Selective Switches (WSS) will have different incident angles with respect to the beam steering device (6); the corresponding areas of the beam steering devices (6) can be controlled independently to achieve deflection of the beams.
2. The method for controlling an operation region multiplexing type wavelength selective switch device according to claim 1, wherein the dispersion unit (4) disperses the light beams of the respective channels into different directions according to the wavelengths, and the optical element having a focusing characteristic further distributes the light beams of the respective wavelength channels to different operation regions of one beam control element; wherein channels from two or more input ports having the same center wavelength are assigned to the same patch of operating area of the beam steering device; different working areas of the beam control device can be independently controlled, deflection of light beams in corresponding areas is achieved, and then each wavelength channel is switched to a corresponding target emergent port.
3. The method as claimed in claim 1, wherein the Wavelength Selective Switch (WSS) has a plurality of ports in the dispersion direction, each corresponding to an input port of the WSS 1.1-1.3 of the Wavelength Selective Switch (WSS), and the three input ports are located at the front focal plane of the fourier lens, and the three incident beams pass through the fourier lens to form a 2f system and then are located at the back focal plane (P) of the fourier lenso) The surfaces are overlapped.
4. A method for controlling a wavelength-selective switching device of the wavelength-division-multiplexed type operating area according to claim 1, characterized in that the incident beam of said wavelength-selective switch (WSS) is in the focal plane (P)o) At different angles of incidence in the direction of dispersion, focal plane (P)o) The plane is also the object plane of a 4f system composed of the first imaging lens (3), the dispersion unit (4) and the second imaging lens (5), namely the focal plane (P)o) Coincides with the front focal plane of the first imaging lens (3) and the dispersive unit (4) is located at the secondAt the back focal plane of an imaging lens (3).
5. The method of claim 4, wherein the 4f system consisting of the first imaging lens (3), the dispersion unit (4) and the second imaging lens (5) has an object plane of the fiber port surface and an image plane of the dispersion unit surface, and the 4f system projects the beams incident from three different WSSs to different regions of the dispersion unit along the dispersion direction, i.e. the y-axis, but the incident angles between the beams and the dispersion unit are substantially the same.
6. The method for controlling an operation region multiplexing-type wavelength selective switch device according to claim 2, wherein the dispersion unit (4) is located at a front focal plane of the imaging lens, and after passing through the second imaging lens (5), the frequency spectrums of three incident ports are distributed to the same operation region in the beam control device, so that the distribution of light spots is realized.
7. The method for controlling an operation area multiplexing-type wavelength selective switch device according to claim 6, wherein the beam steering device reflects the light beams of the WSS 1.1-1.3 of the Wavelength Selective Switch (WSS) and passes through the 4f system consisting of the first imaging lens (3), the dispersion unit (4) and the second imaging lens (5) again to be re-focused on the focal plane (P)o) The output ports of the Wavelength Selective Switches (WSS) WSS 1.1-1.3 are displaced from the optical axis in the dispersion or port direction, since the fourier lenses further convert the angle of the beam into a displacement of the beam from the optical axis, which coincides with different angles of incidence in the dispersion or port direction.
8. The method of claim 6, wherein the beam steering device divides N rows of the operating regions in the port direction, each row corresponding to a set of WSSs.
9. The method for controlling an operation area multiplexing-type wavelength selective switch device according to claim 1, wherein the fourier lens, the first imaging lens (3), and the second imaging lens (5) are all transmissive lenses, or use a mirror having curvature to perform the same function.
10. The method as claimed in claim 1, wherein the operating wavelength range of the operating area multiplexing-type wavelength selective switch device is generally located in the C-band 1528 nm-1570 nm or the L-band 1571 nm-1611 nm of communication, or both the C-band and the L-band.
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| CN202110236147.0A Pending CN112987185A (en) | 2021-03-03 | 2021-03-03 | Control method of working area multiplexing type wavelength selection switch device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023274317A1 (en) * | 2021-07-02 | 2023-01-05 | 华为技术有限公司 | Wavelength selective switch |
| WO2023046018A1 (en) * | 2021-09-26 | 2023-03-30 | 华为技术有限公司 | Optical transmission device and space optical communication device |
| WO2023217084A1 (en) * | 2022-05-09 | 2023-11-16 | 华为技术有限公司 | Wss, roadm, optical transmission system, and transmission method for optical signal |
| WO2023221802A1 (en) * | 2022-05-16 | 2023-11-23 | 华为技术有限公司 | Wavelength selective switch |
| WO2024027485A1 (en) * | 2022-07-30 | 2024-02-08 | 华为技术有限公司 | Wavelength selective switch, method for scheduling light-beam transmission direction, and optical switching node |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104317006A (en) * | 2014-10-30 | 2015-01-28 | 华南师范大学 | Wavelength selective switch |
| CN104597572A (en) * | 2015-01-16 | 2015-05-06 | 华中科技大学 | LCOS (Liquid Crystal on Silicon) based wavelength selecting switch |
| WO2017008208A1 (en) * | 2015-07-10 | 2017-01-19 | 华为技术有限公司 | Wavelength selection switching, reconfigurable optical add-drop multiplexer and wavelength selection method |
| CN106772820A (en) * | 2016-12-16 | 2017-05-31 | 中央民族大学 | High port number wavelength-selective switches and its control method based on optical beam-expanding unit |
-
2021
- 2021-03-03 CN CN202110236147.0A patent/CN112987185A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104317006A (en) * | 2014-10-30 | 2015-01-28 | 华南师范大学 | Wavelength selective switch |
| CN104597572A (en) * | 2015-01-16 | 2015-05-06 | 华中科技大学 | LCOS (Liquid Crystal on Silicon) based wavelength selecting switch |
| WO2017008208A1 (en) * | 2015-07-10 | 2017-01-19 | 华为技术有限公司 | Wavelength selection switching, reconfigurable optical add-drop multiplexer and wavelength selection method |
| CN106772820A (en) * | 2016-12-16 | 2017-05-31 | 中央民族大学 | High port number wavelength-selective switches and its control method based on optical beam-expanding unit |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023274317A1 (en) * | 2021-07-02 | 2023-01-05 | 华为技术有限公司 | Wavelength selective switch |
| WO2023046018A1 (en) * | 2021-09-26 | 2023-03-30 | 华为技术有限公司 | Optical transmission device and space optical communication device |
| WO2023217084A1 (en) * | 2022-05-09 | 2023-11-16 | 华为技术有限公司 | Wss, roadm, optical transmission system, and transmission method for optical signal |
| WO2023221802A1 (en) * | 2022-05-16 | 2023-11-23 | 华为技术有限公司 | Wavelength selective switch |
| WO2024027485A1 (en) * | 2022-07-30 | 2024-02-08 | 华为技术有限公司 | Wavelength selective switch, method for scheduling light-beam transmission direction, and optical switching node |
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Application publication date: 20210618 |