CN120567310B - A channel switching device - Google Patents
A channel switching deviceInfo
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- CN120567310B CN120567310B CN202511050360.7A CN202511050360A CN120567310B CN 120567310 B CN120567310 B CN 120567310B CN 202511050360 A CN202511050360 A CN 202511050360A CN 120567310 B CN120567310 B CN 120567310B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
- H04B10/2513—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion
- H04B10/2519—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion using Bragg gratings
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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
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/12007—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind forming wavelength selective elements, e.g. multiplexer, demultiplexer
- G02B6/12009—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind forming wavelength selective elements, e.g. multiplexer, demultiplexer comprising arrayed waveguide grating [AWG] devices, i.e. with a phased array of waveguides
- G02B6/12033—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind forming wavelength selective elements, e.g. multiplexer, demultiplexer comprising arrayed waveguide grating [AWG] devices, i.e. with a phased array of waveguides characterised by means for configuring the device, e.g. moveable element for wavelength tuning
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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
- G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
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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
- G02B6/351—Optical coupling means having switching means involving stationary waveguides with moving interposed optical elements
- G02B6/3512—Optical coupling means having switching means involving stationary waveguides with moving interposed optical elements the optical element being reflective, e.g. mirror
- G02B6/3518—Optical coupling means having switching means involving stationary waveguides with moving interposed optical elements the optical element being reflective, e.g. mirror the reflective optical element being an intrinsic part of a MEMS device, i.e. fabricated together with the MEMS device
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
- H04B10/2513—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion
- H04B10/2525—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion using dispersion-compensating fibres
- H04B10/25253—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion using dispersion-compensating fibres with dispersion management, i.e. using a combination of different kind of fibres in the transmission system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
- H04B10/2513—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion
- H04B10/2531—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion using spectral inversion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
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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
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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
- H04J14/0215—Architecture aspects
- H04J14/0217—Multi-degree architectures, e.g. having a connection degree greater than two
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Abstract
本发明提供一种信道切换装置，该信道切换装置包括：AWG阵列、光栅和光学偏转器阵列；该信道切换装置通过AWG阵列和光栅将入射的WDM信号传送到光学偏转器阵列，其中，AWG阵列用于对WDM信号沿y方向进行色散，光栅用于对WDM信号沿x方向进行色散，y方向与x方向垂直；光学偏转器阵列用于对色散后的WDM信号在x方向上以不同角度进行偏转；AWG阵列和光栅还用于对偏转后的WDM信号进行合波，并将合波后的WDM信号输出。本发明能够提高该信道切换装置可切换光信号的频谱宽度并增大频谱中的信道密度。
This invention provides a channel switching device, comprising an AWG array, a grating, and an optical deflector array. The channel switching device transmits an incident WDM signal to the optical deflector array via the AWG array and the grating. The AWG array disperses the WDM signal along the y-direction, and the grating disperses the WDM signal along the x-direction, which is perpendicular to the x-direction. The optical deflector array deflects the dispersed WDM signal at different angles along the x-direction. The AWG array and the grating also combine the deflected WDM signal and output the combined WDM signal. This invention can improve the spectral bandwidth of the switchable optical signal and increase the channel density in the spectrum.
Description
Technical Field
The present invention relates to the field of optical communications technologies, and in particular, to a channel switching device.
Background
The minimum channel spacing and spectral range over which the wavelength selective switch (WAVELENGTH SELECTIVE SWITCH, WSS) can optically switch is dependent primarily on the dispersion mode selected. The dispersion units in the wavelength selective switch at present mostly adopt a grating mode for dispersion, because the working spectrum range of the grating can completely cover the communication wave band. The dispersion capability of the grating is related to the reticle density, and is limited by the manufacturing process and materials of the grating, and the reticle density of the grating capable of supporting near infrared band dispersion is mostly less than 1800 lines/mm, so that the grating can only support the minimum channel interval of 50 GHz, and the adoption of multiple grating multiple dispersion places extremely high requirements on the uniformity of grating manufacturing, and the ideal facula morphology is difficult to obtain after the light beam passes through the grating multiple times, and further processing cannot be performed through an optical switching engine, so that the realization of dense channel dispersion lower than 50 GHz through the grating is very difficult.
Disclosure of Invention
In order to solve the above problems, the present invention provides a channel switching device, which can improve the spectrum width of a switchable optical signal and increase the channel density in the spectrum by arranging an AWG array and a grating.
The invention provides a channel switching device, which comprises an AWG array, a grating and an optical deflector array;
the channel switching device transmits an incident WDM signal to the optical deflector array through an AWG array and a grating, wherein the AWG array is used for dispersing the WDM signal along the y direction, the grating is used for dispersing the WDM signal along the x direction, and the y direction is perpendicular to the x direction;
The optical deflector array is used for deflecting the dispersed WDM signal at different angles in the x direction;
the AWG array and the grating are also used to combine the deflected WDM signals and output the combined WDM signals.
Optionally, the channel switching device further comprises a lens group;
The wave splitting/combining ports on the AWG array, the lens group and the optical deflector array are sequentially arranged along the z direction, the lens group comprises a plurality of lenses arranged along the z direction, the grating is positioned among the lenses, and the z direction is mutually perpendicular to the y direction and the x direction respectively;
The lens group is used for converting the angular offset of the deflected WDM signal in the x direction into the position offset along the x direction so that the grating and the AWG array perform wave combination on the deflected WDM signal.
Optionally, the lens group includes a cylindrical lens and a ball lens;
The cylindrical lens, the grating and the ball lens are sequentially arranged front and back along the z direction, the focal lengths of the cylindrical lens and the ball lens are the same, the grating is positioned on the rear focal plane of the cylindrical lens and on the front focal plane of the ball lens, and the distance between the ball lens and the optical deflector array is the focal length of the cylindrical lens;
the ball lens is used to convert the angular offset of the deflected WDM signal in the x-direction into a positional offset in the x-direction.
Optionally, the channel switching device further comprises a collimating lens array;
the plane of the collimating lens array is perpendicular to the z direction and is positioned between the wave-splitting/wave-combining port and the lens group in the z direction.
Optionally, the plane of the branching/combining port is parallel to the plane of the collimating lens array, the branching/combining port corresponds to the collimating lenses in the collimating lens array one by one, the plane of the branching/combining port is parallel to the plane of the collimating lens, and the distance between the plane of the branching/combining port and the plane of the collimating lens is the focal length of the collimating lens.
Optionally, the AWG array comprises a plurality of AWGs, the plurality of AWGs being arranged along the x-direction.
Optionally, one end of each AWG includes an input/output port, and the other end of each AWG includes a plurality of branching/combining ports, and the branching/combining ports on each AWG are arranged along the y direction.
Optionally, the optical deflector array comprises a micro-electromechanical system micro-mirror array.
Optionally, the grating is a one-dimensional grating.
The channel switching device provided by the embodiment of the invention improves the frequency spectrum width of the switchable optical signals and increases the channel density in the frequency spectrum by arranging the AWG array and the grating, realizes the full optical exchange of the ultra-dense channels with wide frequency spectrum, improves the efficiency of optical communication, and simultaneously utilizes the MEMS micromirror deflection, the method ensures lower insertion loss and switching speed, meets the requirements of cascade connection and quick switching of a plurality of channel switching devices in a complex optical network, so that the channel switching devices can be applied to multi-channel optical switching of large nodes in the optical network, support ultra-dense channel intervals, and have lower network request blocking probability compared with the optical network with large channel intervals.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments or the conventional techniques of the present application, the drawings required for the descriptions of the embodiments or the conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
Fig. 1 is a schematic structural view of a channel switching apparatus according to an embodiment of the present application, wherein (a) is a schematic structural view in a y-z plane and (b) is a schematic structural view in an x-z plane;
FIG. 2 is a schematic diagram of an arrangement of an AWG array in accordance with an embodiment of the application;
FIG. 3 is a schematic diagram illustrating a light spot distribution on a MEMS micromirror array according to an embodiment of the application.
Reference numerals:
1. AWG array, 2, grating, 3, optical deflector array, 4, lens group, 41, cylindrical lens, 42, ball lens and 5, collimation lens array.
Detailed Description
In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. Embodiments of the application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
Spatially relative terms, such as "under", "below", "beneath", "under", "above", "over" and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Meanwhile, "directly above" may be used herein to describe that one element or feature shown in the drawings coincides in the vertical direction, in which case it may be partially or completely coincident, specifically, according to the actual situation or the content of the drawing. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "under" or "beneath" other elements would then be oriented "on" the other elements or features. Thus, the exemplary terms "below" and "under" may include both an upper and a lower orientation. Furthermore, the device may also include an additional orientation (e.g., rotated 90 degrees or other orientations) and the spatial descriptors used herein interpreted accordingly.
It will be understood that when an element is referred to as being "fixedly connected" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof.
The digital transformation and the increase of the number of mobile intelligent devices in various industries today put high demands on the communication capacity, and wavelength division multiplexing (WAVELENGTH DIVISION MULTIPLEXING, WDM) is used as a mature technology to support simultaneous transmission of channels with multiple wavelengths, so that the method becomes one of the main means of expanding the capacity of an optical communication network. However, with the increase of the number of channels in the optical transmission network, the channel management becomes an important problem, and the reconfigurable optical add-Drop Multiplexer (ROADM) technology can be remotely operated through software to control the uploading or downloading of any number of wavelength combinations in the optical network node, so that the function of flexibly distributing different wavelengths is achieved, the risk of communication blocking is reduced compared with the fixed switching mode, and the communication efficiency is greatly improved.
The wavelength selective switch (WAVELENGTH SELECTIVE SWITCH, WSS) is used as an all-optical switching component in the ROADM architecture, can switch any wavelength channel in the WDM signal of the input port to any output port, and plays a vital role in a great number of information interaction scenes at present and in the future. The current switching technology of the WSS is mainly liquid crystal spatial light Modulator (SPATIAL LIGHT Modulator) technology or Micro-Electro-MECHANICAL SYSTEM, MEMS technology, wherein the MEMS technology deflects light beams mainly through MEMS micromirrors, so that light switching is realized.
However, as the communication demand increases rapidly, the C-band spectrum utilization rate with the minimum channel spacing of 50 GHz approaches the limit, more and more c+l-band optical network related devices are developed and commercialized, and can support the broadband optical signal processing to become the development direction of future optical communication devices.
Compared with the expanded spectrum, the dense channel is another means for expanding the number of communication channels, and the dense channel has higher flexibility and spectrum utilization rate when facing the demands of users with different communication rates, and can effectively reduce the blocking probability of the optical network request. In this context, WSS capable of implementing a broadband dense channel needs to be proposed.
In addition, compared with the grating, the arrayed waveguide grating (Arrayed Waveguide Grating, AWG) can realize ultra-dense wavelength division multiplexing with a channel interval lower than 50 GHz, and the passband of the transmission spectrum of the arrayed waveguide grating periodically changes with the free space spectrum region (FREE SPECTRAL RANGE, FSR) as a period, but the AWG with a narrow channel interval is difficult to design more channels, so that the passband width of the AWG is difficult to match with the spectrum width of a communication band. The wide frequency spectrum range is realized in terms of dispersion, the channel interval is wide, and the narrow frequency spectrum range is realized in terms of narrow channel interval, so that the design of the WSS cannot meet the requirements of ultra-dense wavelength division multiplexing and wide frequency spectrum at the same time.
An embodiment of the present invention provides a channel switching device, specifically a wavelength selective switch based on an MEMS micro mirror array, referring to fig. 1, the wavelength selective switch includes an AWG array 1, a grating 2, and an optical deflector array 3.
The wavelength selective switch transmits an incident WDM signal through the AWG array 1 and the grating 2 to the optical deflector array 3. Wherein the AWG array 1 is used for dispersing the WDM signal in the y-direction, the grating 2 is used for dispersing the WDM signal in the x-direction, the y-direction is perpendicular to the x-direction, and the optical deflector array 3 comprises an array of MEMS micro-mirrors or liquid crystal on silicon (LCoS) cells, etc. In the present embodiment, the optical deflector array 3 is a MEMS micromirror array.
The optical deflector array 3 is used to deflect the dispersed WDM signal in the x-direction at different angles. The AWG array 1 and the grating 2 are also used for multiplexing the deflected WDM signals and outputting the multiplexed WDM signals.
According to the channel switching device provided by the embodiment of the invention, the frequency spectrum width of the switchable optical signal of the channel switching device is improved and the channel density in the frequency spectrum is increased by arranging the AWG array 1 and the grating 2, so that all-optical exchange of the ultra-dense channels with wide frequency spectrum is realized, and the efficiency of optical communication is improved. In addition, the channel switching device provided in this embodiment utilizes the optical deflector array 3 to reflect the dispersed WDM signal back to the AWG array 1 and the grating 2 for wave combination, which not only improves the space utilization rate of the channel switching device, but also ensures lower insertion loss and switching speed, and meets the requirements of cascade connection and fast switching of a plurality of channel switching devices in a complex optical network, so that the channel switching device is particularly suitable for multi-channel optical switching of large nodes in an optical network, supports ultra-dense channel spacing, and has lower network request blocking probability compared with the optical network with large channel spacing.
Further, the channel switching device also comprises a lens group 4.
The wave splitting/combining ports on the AWG array 1, the lens group 4 and the optical deflector array 3 are sequentially arranged along the z direction, the lens group 4 comprises a plurality of lenses arranged along the z direction, the grating 2 is positioned among the plurality of lenses, and the z direction is mutually perpendicular to the y direction and the x direction respectively;
The lens group 4 is used to convert the angular offset of the deflected WDM signal in the x-direction into a positional offset along the x-direction, so that the grating 2 and the AWG array 1 combine the deflected WDM signal.
In the present embodiment, the lens group 4 includes a cylindrical lens 41 and a ball lens 42. The cylindrical lens 41, the grating 2 and the ball lens 42 are sequentially arranged front and back in the z direction, the focal lengths of the cylindrical lens 41 and the ball lens 42 are the same, the grating 2 is located on the rear focal plane of the cylindrical lens 41 and on the front focal plane of the ball lens 42, and the distance from the ball lens 42 to the optical deflector array 3 is the focal length of the cylindrical lens 41. The ball lens 42 is used to convert the angular offset of the deflected WDM signal in the x-direction into a positional offset in the x-direction.
Further, the channel switching device also comprises a collimating lens array 5.
The plane of the collimating lens array 5 is perpendicular to the z-direction and is located between the add/drop port and the lens group 4 in the z-direction. The collimator lens array 5 and the lens group 4 are used for transmitting the dispersed WDM signal to the optical deflector array 3, so that the optical deflector array 3 reflects the dispersed WDM signal, and the reflected WDM signal is transmitted to the exit of the channel switching device through the lens group 4 and the collimator lens array 5.
Note that, the focal lengths of the collimator lenses in the collimator lens array 5 in different directions are not identical, and the distance between the collimator lens and the cylindrical lens is not particularly limited in this embodiment.
The plane of the branching/combining port is parallel to the plane of the collimating lens array 5, the branching/combining port corresponds to the collimating lenses in the collimating lens array 5 one by one, the plane of the branching/combining port is parallel to the plane of the collimating lenses, and the distance between the plane of the branching/combining port and the plane of the collimating lenses is the focal length of the collimating lenses.
It will be appreciated that in connection with fig. 2, the AWG array 1 includes a plurality of AWGs. Multiple AWGs may be arranged in either the x-direction or the y-direction. In this embodiment, a plurality of AWGs may be arranged along the x-direction, and the grating 2 is a one-dimensional grating 2 for dispersing the WDM signal to be incident on the MEMS micro-mirror array along the x-direction.
One end of each AWG comprises an input/output port, the other end of each AWG comprises a plurality of wave-dividing/wave-combining ports, and the wave-dividing/wave-combining ports on each AWG are distributed along the y direction.
The working principle of the channel switching device provided by the embodiment is as follows, wherein each port of the AWG, namely, the light of the wave-dividing/wave-combining port and the light of the input/output port are transmitted in an optical fiber mode, the input/output port of the AWG is used as the input/output port of the WSS, and the wave-dividing/wave-combining ports of the AWG are arranged in a rectangular array.
Referring to fig. 1, after a WDM signal inputted to the channel switching device is dispersed by an AWG, m sub/sub ports of the AWG are decomposed into m narrow-channel-interval WDM signals arranged along the y direction, and each sub/sub port includes n wavelength channels with FSR spectral widths spaced apart from each other. After the light enters the lens group 4, a 4f system of 1:1 is formed by a cylindrical lens 41 with a focal length f and a spherical lens 42 with a focal length f on a y-z plane, the size of a light spot on the MEMS micro-mirror array in a y direction is controlled, the light is decomposed into n wavelength channels dispersed along an x direction by the grating 2 on an x-z plane, and in combination with fig. 3, lambda m1、λm2、……、λmn is the result of the light on one of the light paths by the grating 2, namely the result of the light on one of the light paths by the grating 2, and lambda 11、λ21、……、λm1 is the result of the light on one of the light paths by an AWG, namely the light on one of the light paths by the AWG. On the plane of the MEMS micro-mirror array, the angles of the micro-vibrating mirrors are controlled to enable light with different wavelengths to deflect at different angles in the x direction, and the light cannot deflect in the y direction, so that the original path returns, and reflected light is converted into position offset along the x direction through a 2f system consisting of spherical lenses 42 with focal lengths f in the x direction, namely different angle offset is converted into different off-axis displacement along the x direction. And then the optical signals with different wavelengths are switched to the input/output ports except for the AWG receiving the initial WDM signals by combining the optical gratings 2 and then combining the optical signals by the input/output ports on at least one other AWG.
The channel switching device provided by the embodiment is based on the characteristics of high deflection speed and low insertion loss of the MEMS micro mirror array, can be applied to a large-capacity dense wavelength division multiplexing communication scene of a large node in an optical network, and plays an important role in application requirements of quick response and cascade connection.
In the description of the present specification, reference to the terms "some embodiments," "other embodiments," "desired embodiments," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (8)
1. A channel switching device is characterized by comprising an AWG array, a grating and an optical deflector array;
the channel switching device transmits an incident WDM signal to the optical deflector array through the AWG array and the grating, wherein the AWG array is used for dispersing the WDM signal along a y direction, the grating is used for dispersing the WDM signal along an x direction, and the y direction is perpendicular to the x direction;
The optical deflector array is used for deflecting the dispersed WDM signal at different angles in the x direction;
The AWG array and the grating are also used for carrying out wave combination on the deflected WDM signals and outputting the combined WDM signals;
the channel switching device further includes a lens group;
The wave splitting/combining ports on the AWG array, the lens group and the optical deflector array are sequentially arranged along the z direction, the lens group comprises a plurality of lenses arranged along the z direction, the grating is positioned among the plurality of lenses, and the z direction is respectively perpendicular to the y direction and the x direction;
The lens group is used for converting the angular offset of the deflected WDM signal in the x direction into the position offset along the x direction, so that the grating and the AWG array are used for carrying out wave combination on the deflected WDM signal.
2. The channel switching device according to claim 1, wherein the lens group comprises a cylindrical lens and a spherical lens;
The cylindrical lens, the grating and the ball lens are sequentially arranged front and back along the z direction, the focal lengths of the cylindrical lens and the ball lens are the same, the grating is positioned on the rear focal plane of the cylindrical lens and on the front focal plane of the ball lens, and the distance between the ball lens and the optical deflector array is the focal length of the cylindrical lens;
the ball lens is used to convert the angular offset of the deflected WDM signal in the x-direction into a positional offset along the x-direction.
3. The channel switching device according to claim 2, wherein the channel switching device further comprises a collimator lens array;
The plane of the collimating lens array is perpendicular to the z direction and is positioned between the wave splitting/combining port and the lens group in the z direction.
4. The channel switching device according to claim 3, wherein a plane of the add/drop port is parallel to a plane of the collimating lens array, the add/drop port corresponds to the collimating lenses in the collimating lens array one by one, the plane of the add/drop port is parallel to the plane of the collimating lens, and a distance between the plane of the add/drop port and the plane of the collimating lens is a focal length of the collimating lens.
5. The channel switching device of claim 1, wherein the AWG array comprises a plurality of AWGs, the plurality of AWGs being arranged along the x-direction.
6. The channel switching device of claim 5, wherein one end of each of said AWGs includes an input/output port, and the other end of each of said AWGs includes a plurality of add/drop ports, said add/drop ports on each of said AWGs being aligned in said y-direction.
7. The channel switching device of any one of claims 1 to 6, wherein the optical deflector array comprises a micro-electromechanical system micro-mirror array.
8. The channel switching device according to any one of claims 1 to 6, wherein the grating is a one-dimensional grating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202511050360.7A CN120567310B (en) | 2025-07-29 | 2025-07-29 | A channel switching device |
Applications Claiming Priority (1)
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| JP2008203775A (en) * | 2007-02-22 | 2008-09-04 | Nippon Telegr & Teleph Corp <Ntt> | Wavelength selective switch |
| CN118112721A (en) * | 2022-11-29 | 2024-05-31 | 华为技术有限公司 | A wavelength selective switch and related equipment |
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| JP4842226B2 (en) * | 2007-08-09 | 2011-12-21 | 日本電信電話株式会社 | Wavelength selective switch |
| JP2010271645A (en) * | 2009-05-25 | 2010-12-02 | Nippon Telegr & Teleph Corp <Ntt> | Wavelength selective switch |
| JP5910970B2 (en) * | 2013-01-29 | 2016-04-27 | 日本電信電話株式会社 | Wavelength selective switch |
| CN113671624B (en) * | 2020-05-13 | 2022-11-11 | 华为技术有限公司 | Optical switching device, redirection method, reconfigurable optical add-drop multiplexer and system |
| CN114485935B (en) * | 2021-12-25 | 2025-06-13 | 西北工业大学深圳研究院 | A spectral imaging system and method based on MEMS |
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| JP2008203775A (en) * | 2007-02-22 | 2008-09-04 | Nippon Telegr & Teleph Corp <Ntt> | Wavelength selective switch |
| CN118112721A (en) * | 2022-11-29 | 2024-05-31 | 华为技术有限公司 | A wavelength selective switch and related equipment |
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