CN117170025A - Wavelength selective switch and optical signal processing method - Google Patents

Abstract

The embodiment of the application discloses a wavelength selective switch and an optical signal processing method, which are used for reconstructing an optical signal transmission link and reducing the requirement on an optical exchange engine of the wavelength selective switch. The embodiment of the application comprises a wavelength selective switch WSS, which comprises: a first incident port, a second incident port, a dispersive element, a first lens module, and a switching engine; the dispersive element is used for dispersing the first optical signals transmitted by the first incident port into a first optical signal set, and the wavelength of each optical signal in the first optical signal set is different; dispersing the second optical signals transmitted by the second incident port into a second optical signal set, wherein the wavelength of each optical signal in the second optical signal set is different; the first lens module is used for transmitting the target optical signal pair to the same area in the exchange engine, wherein the target optical signal pair is any one of the optical signal pair sets, and the wavelengths of the optical signal pairs in the optical signal pair sets are the same.

Description

Wavelength selective switch and optical signal processing method

Technical Field

The embodiment of the application relates to the field of optical signal processing, in particular to a wavelength selective switch and an optical signal processing method.

Background

Wavelength selective switches (wavelength selective switch, WSS) are key components in reconfigurable optical add drop multiplexing systems. The wavelength selective switch can demultiplex optical signals with different wavelengths in the incident link, the signals with different wavelengths are transmitted to different areas of an optical exchange engine of the wavelength selective switch, the optical exchange engine can independently regulate and control the incident light with different wavelengths, each link can be controlled to be transmitted to different emergent ports, and the reconstruction of the link is completed.

In the existing wavelength selective switch, different wavelength links of different incident ports need to occupy different areas of an optical switching engine, so that separate control of each link is realized.

Disclosure of Invention

The embodiment of the application provides a wavelength selective switch and an optical signal processing method, which are used for reconstructing an optical signal transmission link and reducing the requirement on an optical exchange engine of the wavelength selective switch.

A first aspect of an embodiment of the present application provides a wavelength selective switch WSS, the WSS comprising: the optical device comprises a first incident port, a second incident port, a dispersive element, a first lens module and a switching engine. The dispersive element is used for dispersing the first optical signals transmitted by the first incident port into a first optical signal set, and the wavelength of each optical signal in the first optical signal set is different; and dispersing the second optical signals transmitted by the second incidence port into a second optical signal set, wherein the wavelength of each optical signal in the second optical signal set is different. The first lens module is used for transmitting the target optical signal pair to the same area in the exchange engine, wherein the target optical signal pair is any one of the optical signal pair sets, the wavelengths of the optical signal pairs in the optical signal pair sets are the same, one optical signal in any one optical signal pair is an optical signal of the first optical signal set, and the other optical signal is an optical signal of the second optical signal set.

In this possible implementation manner, for the target optical signal pair with the same wavelength and transmitted by the first incident port and the second incident port, the first lens module transmits the target optical signal pair to the same area in the switching engine, so that the same control on the same wavelength of different incident ports is realized, and the requirement of the WSS on the optical area of the switching engine is reduced.

In a possible implementation manner of the first aspect, the target optical signal includes a third optical signal and a fourth optical signal, and the WSS further includes a plurality of exit ports; the switching engine is used for transmitting the third optical signal and the fourth optical signal to the plurality of outgoing ports.

In one possible implementation of the first aspect, the first lens module includes a first lens, a second lens, and a third lens, the first lens and the second lens being between the light array and the dispersive element, the third lens being between the dispersive element and the switching engine, the optical fiber array including a first incident port, a second incident port, and a plurality of exit ports. The first lens is used for receiving the first optical signal and the second optical signal transmitted by the first incident port and the second incident port and transmitting the first optical signal and the second optical signal to the second lens. The second lens is used for receiving the first optical signal and the second optical signal transmitted by the first lens and transmitting the first optical signal and the second optical signal to the dispersive element. The third lens is used for receiving the first optical signal set and the second optical signal set transmitted by the dispersive element and sending the first optical signal set and the second optical signal set to the switching engine.

In a possible implementation manner of the first aspect, the first incident port and the second incident port are symmetrical along a central axis of the first lens module, a distance between the optical fiber array and the first lens is a focal length of the first lens, a distance between the first lens and the second lens is a sum of focal lengths of the two lenses, a distance between the second lens and the dispersive element is a focal length of the second lens, and a distance between the dispersive element and the third lens is a focal length of the third lens.

In a possible implementation manner of the first aspect, the WSS further includes: the second lens module is used for receiving a third optical signal sent by the switching engine and transmitting the third optical signal to a first emergent port in the plurality of emergent ports; and receiving a fourth optical signal sent by the switching engine and transmitting the fourth optical signal to a second exit port of the plurality of exit ports.

In a possible implementation manner of the first aspect, the first exit port is an exit port corresponding to the second incident port, and the second exit port is an exit port corresponding to the first incident port.

In this possible implementation, the same area of the switching engine realizes the same control of the same wavelength for different incident ports by controlling the transmission directions of the third optical signal and the fourth optical signal, compared with the transmission paths of the two optical signals switched in the prior art.

In a possible implementation manner of the first aspect, the WSS further includes: the device comprises a first polarization beam splitter prism, a second polarization beam splitter prism, a first half wave plate and a second half wave plate. The first polarization beam splitter prism is used for splitting the first optical signal into first polarized light and second polarized light, transmitting the first polarized light to the dispersive element and transmitting the second polarized light to the first half-wave plate. And the first half wave plate is used for deflecting the second polarized light and transmitting the second polarized light to the dispersive original. And the second polarization splitting prism is used for splitting the second optical signal into third polarized light and fourth polarized light, transmitting the third polarized light to the dispersive element and transmitting the fourth polarized light to the second half-wave plate. And the second half wave plate is used for deflecting the second polarized light and transmitting the second polarized light to the dispersive original.

In a possible implementation manner of the first aspect, the optical fiber array is an entire row of optical fibers of m×n+1, where M is the number of incident ports and N is the number of exit ports in the same row as the incident ports.

A second aspect of an embodiment of the present application provides an optical signal processing method, which is applied to a wavelength selective switch WSS, and the wavelength selective switch WSS, where the WSS includes a first incident port, a second incident port, a dispersive element, a first lens module, and a switching engine, and the method includes: the first optical signal transmitted through the first incident port is dispersed by the dispersive element into a first set of optical signals, each of the optical signals in the first set of optical signals having a different wavelength. The second optical signal transmitted through the second incident port is dispersed by the dispersive element into a second set of optical signals, each of the second set of optical signals having a different wavelength. The target optical signal pair is transmitted to the same area in the exchange engine through the first lens module, the target optical signal pair is any one of the optical signal pair sets, the wavelengths of the optical signal pairs in the optical signal pair sets are the same, one optical signal in any one optical signal pair is an optical signal of the first optical signal set, and the other optical signal is an optical signal of the second optical signal set.

In a possible implementation manner of the second aspect, the target optical signal includes a third optical signal and a fourth optical signal, the WSS further includes a plurality of exit ports, and the method further includes: the third optical signal and the fourth optical signal are transmitted to the plurality of exit ports by the switching engine.

In one possible implementation manner of the second aspect, the first lens module includes a first lens, a second lens, and a third lens, the first lens and the second lens being between the light array and the dispersive element, the third lens being between the dispersive element and the switching engine, the optical fiber array including a first incident port, a second incident port, and a plurality of exit ports, the method further including: the first optical signal and the second optical signal transmitted by the first incident port and the second incident port are received through the first lens and sent to the second lens. The first optical signal and the second optical signal transmitted by the first lens are received by the second lens and sent to the dispersive element. The first optical signal set and the second optical signal set transmitted by the dispersive element are received by the third lens and sent to the switching engine.

In a possible implementation manner of the second aspect, the first incident port and the second incident port are symmetrical along a central axis of the first lens module, a distance between the optical fiber array and the first lens is a focal length of the first lens, a distance between the first lens and the second lens is a sum of focal lengths of the two lenses, a distance between the second lens and the dispersive element is a focal length of the second lens, and a distance between the dispersive element and the third lens is a focal length of the third lens.

In a possible implementation manner of the second aspect, the WSS further includes a second lens module, and the method further includes: the third optical signal sent by the switching engine is received by the second lens module and transmitted to the first one of the plurality of exit ports. And receiving a fourth optical signal sent by the switching engine through the second lens module and transmitting the fourth optical signal to a second exit port of the plurality of exit ports.

In a possible implementation manner of the second aspect, the first exit port is an exit port corresponding to the second incident port, and the second exit port is an exit port corresponding to the first incident port.

In a possible implementation manner of the second aspect, the WSS further includes a first polarization splitting prism, a second polarization splitting prism, a first half-wave plate, and a second half-wave plate, and the method further includes: the first optical signal is split into first polarized light and second polarized light by the first polarization splitting prism, the first polarized light is transmitted to the dispersive element, and the second polarized light is transmitted to the first half-wave plate. The second polarized light is deflected by the first half wave plate and transmitted to the dispersive element. The second optical signal is split into third polarized light and fourth polarized light by the second polarization splitting prism, the third polarized light is transmitted to the dispersive element, and the fourth polarized light is transmitted to the second half-wave plate. The second polarized light is deflected by the second half wave plate and transmitted to the dispersive element.

In a possible implementation manner of the second aspect, the optical fiber array is an entire row of optical fibers of m×n+1, where M is the number of incident ports and N is the number of exit ports in the same row as the incident ports.

A third aspect of the embodiments of the present application provides an optical processing device, where the optical processing device includes a wavelength selective switch described in the first aspect or any one of the specific implementation manners of the first aspect, and the wavelength selective switch may implement an optical signal processing method described in the second aspect or any one of the specific implementation manners of the second aspect.

From the above technical solutions, the embodiment of the present application has the following advantages:

in the embodiment of the application, for the target optical signal pair with the same wavelength transmitted by the first incident port and the second incident port, the target optical signal pair is transmitted to the same area in the exchange engine by the first lens module, so that the same control of the same wavelength of different incident ports is realized, and the optical area requirement of the WSS on the exchange engine is reduced.

Drawings

FIG. 1a is a schematic diagram of a wavelength selective switch;

FIG. 1b is a schematic diagram of another configuration of a wavelength selective switch;

FIG. 2a is a schematic diagram of a wavelength selective switch for transmitting an optical signal according to an embodiment of the present application;

FIG. 2b is a schematic diagram of another embodiment of a wavelength selective switch for transmitting an optical signal;

FIG. 2c is a schematic diagram of another embodiment of a wavelength selective switch for transmitting an optical signal;

FIG. 3a is a schematic diagram of another embodiment of a wavelength selective switch for transmitting an optical signal;

FIG. 3b is a schematic diagram of another embodiment of a wavelength selective switch for transmitting an optical signal;

FIG. 3c is a schematic diagram of another embodiment of a wavelength selective switch for transmitting an optical signal;

FIG. 4a is a schematic diagram of another embodiment of a wavelength selective switch for transmitting an optical signal;

FIG. 4b is a schematic diagram of another embodiment of a wavelength selective switch for transmitting an optical signal;

FIG. 5a is a schematic diagram of another embodiment of a wavelength selective switch for transmitting an optical signal;

FIG. 5b is a schematic diagram of another embodiment of a wavelength selective switch for transmitting an optical signal;

FIG. 5c is a schematic diagram of another embodiment of a wavelength selective switch for transmitting an optical signal;

FIG. 6a is a schematic diagram of a port matrix array of wavelength selective switches according to an embodiment of the present application;

FIG. 6b is a schematic diagram of another port matrix array of wavelength selective switches according to an embodiment of the present application;

FIG. 6c is a schematic diagram of another port matrix array of the wavelength selective switch according to an embodiment of the present application;

FIG. 7 is a schematic flow chart of an optical signal processing method according to an embodiment of the application;

fig. 8 is a schematic diagram of a structure of an optical processing device according to an embodiment of the present application.

Detailed Description

The embodiment of the application provides a wavelength selective switch and an optical signal processing method, which are used for reconstructing an optical signal transmission link and reducing the requirement on an optical exchange engine of the wavelength selective switch.

Embodiments of the present application will now be described with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the present application. As one of ordinary skill in the art can know, with the development of technology and the appearance of new scenes, the technical scheme provided by the embodiment of the application is also applicable to similar technical problems.

The terms first, second and the like in the description and in the claims and in the above-described figures, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments described herein may be implemented in other sequences than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

As shown in fig. 1a and 1b, the wavelength selective switch (wavelength selective switch, WSS) 100 is a key component in a reconfigurable optical add drop multiplexing system. The wavelength selective switch can demultiplex optical signals with different wavelengths incident from the incident port 101, the signals with different wavelengths are transmitted to different areas of the switching engine 104 of the wavelength selective switch 100, the switching engine 104 can independently regulate and control the incident light with different wavelengths, each link can be controlled to be transmitted to different emergent ports 105, and the optical signal incident from each incident port 101 can be transmitted to one emergent port of a plurality of emergent ports 105 with the same row of incident ports, so as to complete the reconstruction of the link.

As shown in fig. 2a, 2b and 2c, an embodiment of the present application provides a wavelength selective switch 200, the wavelength selective switch 200 comprising: a first incident port 201, a second incident port 202, a dispersive element 203, a first lens module 204, and a switching engine 205.

The first incident port 201 and the second incident port 202 form an incident port pair. A first one 201 of the pair of input ports is for transmitting a first optical signal to a dispersive element 203; the second of the pair of entrance ports 202 is used to transmit a second optical signal to a dispersive element 203.

In a possible implementation manner, the first incident port 201 and the second incident port 202 in the embodiment of the present application are symmetrical along the central axis of the first lens module 204, which is not limited herein.

In a possible implementation manner, the wavelength selective switch 200 in the embodiment of the present application further includes other incident ports, for example, a third incident port and a fourth incident port, where the third incident port and the fourth incident port are used to transmit the received optical signal to the dispersive element 203, and the specific functions are similar to those of the first incident port 201 and the second incident port 202 described above, and are not repeated herein.

In an embodiment of the present application, the first lens module 204 may include a first lens 206, i.e., lens 1, a second lens 207, i.e., lens 2, and a third lens 208, i.e., lens 3, where the first lens 206 and the second lens 207 are located between the fiber array and the dispersive element 203, and the third lens 208 is located between the dispersive element 203 and the switching engine 205.

The first lens 206 is configured to receive the first optical signal and the second optical signal transmitted by the first incident port and the second incident port, and send the first optical signal and the second optical signal to the second lens.

The second lens 207 is configured to receive the first optical signal and the second optical signal transmitted by the first lens, and send the first optical signal and the second optical signal to the dispersive element 203.

In the embodiment of the present application, the first lens module 204 includes a lens 1, a lens 2 and a lens 3, the optical fiber arrays are arranged along the symmetry axis in the XY plane, the distance between the optical fiber arrays and the lens 1 is the focal length of the lens 1, the distance between the lens 1 and the lens 2 is the sum of the focal lengths of the two lenses, the distance between the lens 2 and the chromatic three unit is the focal length of the lens 2, and the distance between the chromatic dispersion unit and the lens 3 is the focal length of the lens 3. The signal in the input port is transmitted through lens 1 and lens 2 to different locations of the dispersive unit. After passing through the lens 3, signals of the same wavelength at different ports cover the same area of the optical switching engine.

The dispersive element 203 is configured to disperse the received optical signal, and if the received optical signal is a composite optical signal, the dispersive element 203 disperses the composite optical signal into at least two optical signals with different wavelengths. Specifically, the dispersive element 203 is configured to disperse the first optical signal transmitted by the first incident port 201 into a first optical signal set, where the first optical signal is a composite optical signal, and the first optical signal set includes a third optical signal, and other optical signals in the first optical signal set are different from the third optical signal in wavelength. The dispersive element 203 then transmits the optical signals of the first set of optical signals to the first lens module 204.

The dispersive element 203 is also configured to disperse the second optical signal transmitted by the second incident port 202 into a second set of optical signals, which is not a composite optical signal, including a fourth optical signal. The dispersive element 203 then transmits the optical signals of the second set of optical signals to the third lens 208 in the first lens module 204.

It can be understood that, as shown in fig. 2b, the dispersive element 203 in the embodiment of the present application is configured to disperse the composite optical signal transmitted by the incident port into at least two optical signals with different wavelengths, and when the wavelength selective switch 200 in the embodiment of the present application further includes other incident ports, the dispersive element 203 is configured to receive the optical signals transmitted by the incident ports and disperse the composite optical signal in the optical signals into a plurality of optical signals with different wavelengths, which is similar to the dispersive element 203 in specific application and will not be repeated herein.

The third lens 208 in the first lens module 204 is used to transmit the optical signal transmitted by the dispersive element 203 onto the switching engine 205. Wherein for an optical signal pair consisting of one optical signal of the first optical signal set and one optical signal of the second optical signal set, the wavelengths of the two optical signals in the optical signal pair are the same, the third lens 208 will transmit the two optical signals of the optical signal pair onto the same area of the switching engine 205.

As shown in fig. 3c, the first lens module 204 is configured to transmit a third optical signal in the first optical signal set and a fourth optical signal in the second optical signal set to the same area in the switching engine, where the third optical signal and the fourth optical signal are a pair of optical signals, and the wavelengths of the third optical signal and the fourth optical signal are the same.

In the embodiment of the present application, the included angles between the two optical signals in the optical signal pair with the same wavelength and the principal axis of the first lens module 204 are the same. Specifically, the included angles of the third optical signal and the fourth optical signal in the embodiment of the present application and the main axis of the first lens module 204 are the same.

The switching engine 205 is configured to receive the optical signal transmitted by the first lens module 204, and transmit the received optical signal to a corresponding exit port by adjusting the reflection angles of different areas of the switching engine. Wherein, for the optical signal pair transmitted to the same area, the switching engine transmits either one of the two optical signals to one of the corresponding exit ports of the other optical signal. The outgoing ports corresponding to the optical signals are a plurality of outgoing ports in the same row with the optical signals. That is, the switching engine 205 in the embodiment of the present application switches the transmission paths of two optical signals of an optical signal pair, compared to the prior art, which transmits an optical signal to one of the corresponding set of output ports of the optical signal itself.

As shown in fig. 2c, in particular, the switching engine 205 is configured to transmit the received third optical signal to the second outgoing port corresponding to the second incoming port. And transmitting the received fourth optical signal to a second exit port corresponding to the second incident port. In the prior art, the switching engine transmits the third optical signal of the first optical signal transmitted by the first incident port to the first exit port corresponding to the first incident port, and the switching engine transmits the fourth optical signal of the second optical signal transmitted by the second incident port to the second exit port corresponding to the second incident port. Compared to the prior art, the switching engine 205 in the embodiment of the present application switches the transmission paths of the third optical signal and the fourth optical signal.

As shown in fig. 3a, 3b and 3c, the wavelength selective switch 300 in the embodiment of the present application includes an optical fiber array 301, a first lens 302, a second lens 303, a second lens module 304, a third lens 305, an optical switching engine 306 and a dispersion unit 307, where the second lens module 304 includes a fourth lens, i.e. a lens 4, and the lens 4 is located between the optical switching engine 306 and the optical fiber array 301, and the optical switching engine 306 synchronously controls the transmission directions of the same wavelength signals transmitted by different input ports, and is coupled into different output ports in combination with the lens 4. The fourth lens 304 is configured to receive the optical signal transmitted by the optical switching engine 306 and transmit the optical signal to an exit port in the optical fiber array 301.

The above embodiments are mainly directed to the case where the switching engine is responsive to only single polarized light, for which purpose it is necessary to convert the different polarization states of the input signal to the same polarization state, in order to satisfy the condition that the optical switching engine is responsive to only single polarized light. The scheme for single polarized light is described below:

as shown in fig. 4a, in one possible implementation, the wavelength selective switch 400 further includes a polarization splitting prism and a half-wave plate. Specifically, the wavelength selective switch 400 includes an optical fiber array 401, a first lens 402, a second lens 403, a dispersion unit 404, a third lens 405, an optical switching engine 406, and the wavelength selective switch 400 further includes a first polarization splitting prism 407, a second polarization splitting prism 408, a first half-wave plate 409, and a second half-wave plate 410. The first polarization splitting prism 407 is configured to split the first optical signal into first polarized light and second polarized light, and transmit the first polarized light to the dispersive element and the second polarized light to the first half-wave plate. The first half wave plate 409 is used to deflect the second polarized light and transmit it to the dispersive element. The second half-wave plate 410 is used for deflecting the fourth polarized light and transmitting the fourth polarized light to the second polarization splitting prism 408. The second polarization splitting prism 408 is used to combine the third polarized light and the fourth polarized light into a second optical signal and transmit the second polarized light to the output port.

In a possible implementation manner, the ports of the wavelength selective switch 400 are input/output composite ports, and the optical paths of the optical signals transmitted by the first polarization splitting prism 407, the second polarization splitting prism 408, the first half-wave plate 409 and the second half-wave plate 410 are reversible, which is not limited herein.

In the possible implementation manner, a polarization beam splitter prism and a half-wave plate are added between an incident port and a lens, and after an optical signal is transmitted to the polarization beam splitter prism PBS, P light is transmitted through the PBS and is changed into S1 light through the half-wave plate; the S light in the original signal is reflected by the PBS and then is reflected by the triangular reflecting mirror to be transmitted in parallel with the S1 light, the S light and the S1 light are transmitted to the dispersion unit through the lens 1 and the lens 2, the S light and the S1 light with different wavelengths are transmitted in different directions, and the S light are transmitted to the exchange engine through the lens 3 to cover the same area (the S light of the combining device p light and the S light can be exchanged). Because the two output ports are symmetrical, signals with the same wavelength in the other input port are also transmitted to the same area of the switching engine, and the signals of the two input ports are transmitted to the corresponding ports through the switching engine to switch the transmission paths on the dispersion plane.

As shown in fig. 4b, in a possible implementation manner, the polarization splitting prism may also be a wollaston prism, the optical signals in the input port are transmitted along a symmetrical angle after passing through the wollaston prism, and then become optical signals with the same polarization state after passing through the half-wave plate, and are collimated by the lens 1 and then are transmitted to different positions of the dispersion unit in parallel, the signals with different wavelengths in the transmitted signals are transmitted along different angles and are transmitted to the optical exchange engine by the lens 2, and the optical signals with the same wavelength in the two beams cover the same position of the optical exchange engine. Because the two output ports are symmetrical, signals with the same wavelength in the other input port are also transmitted to the same area of the switching engine, and the signals of the two input ports are transmitted to the corresponding ports through the switching engine to switch the transmission paths on the dispersion plane. A lens 3 is arranged on the light path in the port direction, and the optical switching engine is combined with the lens to realize the port switching.

As shown in fig. 5a, 5b and 5c, the incident and exit ports in the embodiments of the present application may form a port matrix array. The port array may be an m×n port array, where M is the number of incident ports, and N is the number of exit ports of an exit port group, i.e. an exit port group corresponding to an incident port (i.e. a plurality of exit ports in the same column as the incident port).

In a possible implementation manner, the port matrix formed by the incident and emergent ports in the embodiment of the application may include four incident ports, i.e., a first incident port, a second incident port, a third incident port and a fourth incident port. The first incident port and the second incident port form an incident port pair, and the third incident port and the fourth incident port form an incident port pair. The first incident port and the second incident port are symmetrical along a central axis of the first lens module, and the third incident port and the fourth incident port are symmetrical along the central axis of the first lens module. The port matrix further comprises a first exit port group corresponding to the first incident port, a second exit port group corresponding to the second incident port, a third exit port group corresponding to the third incident port and a fourth exit port group corresponding to the fourth incident port, wherein the first exit port group is an exit port in the same column as the first incident port, the second exit port group is an exit port in the same column as the second incident port, the third exit port group is an exit port in the same column as the third incident port, and the fourth exit port group is an exit port in the same column as the fourth incident port.

In a possible implementation manner, as shown in fig. 6a and fig. 6b, in a port matrix formed by the incident exit ports in the embodiment of the present application, the incident ports may not be located in the middle of the exit ports, or may be located in the middle of the exit ports, which is not limited herein.

In a possible implementation manner, as shown in fig. 6c, in a port matrix formed by the incident and exit ports in the embodiment of the present application, the incident ports and the exit ports are not necessarily all in the same column, and it is only required to satisfy that the incident ports have the corresponding exit ports. The entrance port and the exit port may be arbitrarily combined, and are not limited herein.

In a possible implementation manner, the incident port and the exit port in the embodiment of the present application may be an incident-exit composite port having the functions of both incident optical signals and exiting optical signals, which is not limited herein.

Fig. 7 is a schematic flow chart of an optical signal processing method in an embodiment of the application. As shown in fig. 7, an embodiment of the present application provides an optical signal processing method, which is applied to a wavelength selective switch WSS, where the WSS includes at least one incident port pair, a dispersive element, a first lens module, and a switching engine, and a first incident port and a second incident port of a target incident port pair are symmetrical along a central axis of the first lens module, and the target incident port pair is any one of the at least one incident port pair, and the method includes:

701. the WSS disperses the first optical signal and the second optical signal into a first set of optical signals and a second set of optical signals.

The wavelength selective switch disperses the first optical signal transmitted by the first incident port into a first set of optical signals by a dispersive element, the wavelengths of each optical signal in the first set of optical signals being different. The wavelength selective switch disperses the second optical signal transmitted by the second incident port into a second set of optical signals by the dispersive element, the second set of optical signals having different wavelengths for each optical signal.

702. The WSS transmits the target optical signal pair to the same area in the switching engine.

The wavelength selective switch transmits the target optical signal pair to the same area in the switching engine through the lens, wherein the target optical signal pair is any one of the optical signal pair sets, the wavelengths of any one of the optical signal pair sets are the same, one optical signal in any one of the optical signal pairs is an optical signal of the first optical signal set, and the other optical signal is an optical signal of the second optical signal set.

703. The WSS transmits the optical signal to the exit port.

The wavelength selective switch transmits the third optical signal to one of the outgoing ports in the outgoing port group corresponding to the fourth optical signal through the switching engine; and transmitting the fourth optical signal to one of the exit ports in the exit port group corresponding to the third optical signal.

In the embodiment of the application, the included angle between the third optical signal and the first lens module is the same as the included angle between the fourth optical signal and the first lens module.

In the embodiment of the present application, a plurality of exit port groups and at least one incident port pair form an m×n port array, where M is the number of incident port pairs and N is the number of exit ports of an exit port group.

In the embodiment of the present application, the optical signal processing method is implemented by executing corresponding steps by the wavelength selective switch in the embodiment shown in any one of fig. 2a to fig. 6c, and the description about the wavelength selective switch shown in any one of fig. 2a to fig. 6c may be specifically referred to, which is not repeated herein.

Fig. 8 is a schematic diagram of a structure of an optical processing device according to an embodiment of the present application. As shown in fig. 8, an embodiment of the present application provides an optical processing apparatus, where the optical processing apparatus includes a wavelength selective switch shown in any one of fig. 2a to fig. 6c, and the wavelength selective switch is used to perform the optical signal processing method shown in fig. 7, which is not described herein in detail.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.

In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM, random access memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

Claims (17)

1. A wavelength selective switch WSS, the WSS comprising:

a first incident port, a second incident port, a dispersive element, a first lens module, and a switching engine;

the dispersive element is used for dispersing the first optical signals transmitted by the first incident port into a first optical signal set, and the wavelength of each optical signal in the first optical signal set is different; dispersing the second optical signals transmitted by the second incident port into a second optical signal set, wherein the wavelength of each optical signal in the second optical signal set is different;

the first lens module is used for transmitting a target optical signal pair to the same area in the switching engine, the target optical signal pair is any one of the optical signal pair sets, the wavelengths of the optical signal pairs in the optical signal pair sets are the same, one optical signal in any one optical signal pair is an optical signal of a first optical signal set, and the other optical signal is an optical signal of a second optical signal set.

2. The WSS of claim 1, wherein the target optical signal comprises a third optical signal and a fourth optical signal, the WSS further comprising a plurality of outgoing incident ports;

the switching engine is configured to transmit the third optical signal and the fourth optical signal to the plurality of exit ports.

3. The WSS of claim 2, wherein the first lens module comprises a first lens, a second lens, and a third lens, the first lens and the second lens being between a light array and the dispersive element, the third lens being between the dispersive element and the switching engine, the fiber array comprising the first incident port, the second incident port, and the plurality of exit ports;

the first lens is used for receiving the first optical signal and the second optical signal transmitted by the first incident port and the second incident port and sending the first optical signal and the second optical signal to the second lens;

the second lens is used for receiving the first optical signal and the second optical signal transmitted by the first lens and transmitting the first optical signal and the second optical signal to the dispersive element;

the third lens is configured to receive the first optical signal set and the second optical signal set transmitted by the dispersive element and send the first optical signal set and the second optical signal set to the switching engine.

4. A WSS according to claim 3, wherein the first and second entrance ports are symmetrical along a central axis of the first lens module, the fiber array is spaced from the first lens by a focal length of the first lens, the first lens is spaced from the second lens by a sum of focal lengths of the two lenses, the second lens is spaced from the dispersive element by a focal length of the second lens, and the dispersive element is spaced from the third lens by a focal length of the third lens.

5. The WSS of claim 4, further comprising:

a second lens module for receiving a third optical signal sent by the switching engine and transmitting the third optical signal to a first exit port of the plurality of exit ports; and receiving a fourth optical signal sent by the switching engine, and transmitting the fourth optical signal to a second exit port in the plurality of exit ports.

6. The WSS of claim 5, wherein the first exit port is an exit port corresponding to the second entrance port, and the second exit port is an exit port corresponding to the first entrance port.

7. The WSS of claim 6, further comprising: the device comprises a first polarization beam splitter prism, a second polarization beam splitter prism, a first half-wave plate and a second half-wave plate;

the first polarization splitting prism is used for splitting a first optical signal into first polarized light and second polarized light, transmitting the first polarized light to the dispersive element and transmitting the second polarized light to the first half-wave plate;

the first half wave plate is used for deflecting the second polarized light and transmitting the second polarized light to the dispersion original;

the second polarization splitting prism is configured to split a second optical signal into third polarized light and fourth polarized light, and transmit the third polarized light to a dispersive element, and transmit the fourth polarized light to the second half-wave plate;

the second half wave plate is used for deflecting the second polarized light and transmitting the second polarized light to the dispersive original.

8. A WSS according to any one of claims 1-7, wherein the fiber array is an array of M (n+1) fibers, M being the number of entrance ports and N being the number of exit ports in the same array as the entrance ports.

9. An optical signal processing method, applied to a wavelength selective switch WSS, the WSS including a first incident port, a second incident port, a dispersive element, a first lens module, and a switching engine, the method comprising:

dispersing a first optical signal transmitted by the first incident port into a first set of optical signals by the dispersive element, the first set of optical signals each having a different wavelength;

dispersing, by the dispersive element, the second optical signal transmitted by the second incident port into a second set of optical signals, each of the second set of optical signals having a different wavelength;

and transmitting the target optical signal pair to the same area in the exchange engine through the first lens module, wherein the target optical signal pair is any one of the optical signal pair sets, the wavelengths of the optical signal pairs in the optical signal pair sets are the same, one optical signal in any one optical signal pair is an optical signal of a first optical signal set, and the other optical signal is an optical signal of a second optical signal set.

10. The method of claim 9, wherein the target optical signal comprises a third optical signal and a fourth optical signal, the WSS further comprising a plurality of exit ports, the method further comprising:

transmitting the third and fourth optical signals to the plurality of exit ports by the switching engine.

11. The method of claim 10, wherein the first lens module comprises a first lens, a second lens, and a third lens, the first lens and the second lens being between a light array and the dispersive element, the third lens being between the dispersive element and the switching engine, the fiber array comprising the first incident port, the second incident port, and the plurality of exit ports, the method further comprising:

receiving the first optical signal and the second optical signal transmitted by the first incident port and the second incident port through the first lens, and transmitting the first optical signal and the second optical signal to the second lens;

receiving the first optical signal and the second optical signal transmitted by the first lens through the second lens, and transmitting the first optical signal and the second optical signal to the dispersive element;

the first optical signal set and the second optical signal set transmitted by the dispersive element are received by the third lens and sent to the switching engine.

12. The method of claim 11, wherein the first and second entrance ports are symmetrical along a central axis of the first lens module, the fiber array is spaced from the first lens by a focal length of the first lens, the first lens is spaced from the second lens by a sum of focal lengths of the two lenses, the second lens is spaced from the dispersive element by a focal length of the second lens, and the dispersive element is spaced from the third lens by a focal length of the third lens.

13. The method of claim 12, wherein the WSS further comprises a second lens module, the method further comprising:

receiving a third optical signal sent by the switching engine through the second lens module, and transmitting the third optical signal to a first exit port of the plurality of exit ports;

and receiving a fourth optical signal sent by the switching engine through the second lens module, and transmitting the fourth optical signal to a second exit port in the plurality of exit ports.

14. The method of claim 13, wherein the first exit port is an exit port corresponding to the second entrance port, and the second exit port is an exit port corresponding to the first entrance port.

15. The method of claim 14, wherein the WSS further comprises a first polarization splitting prism, a second polarization splitting prism, a first half-wave plate, and a second half-wave plate, the method further comprising:

the first polarization beam splitting prism is used for splitting a first optical signal into first polarized light and second polarized light, the first polarized light is transmitted to the dispersive element, and the second polarized light is transmitted to the first half-wave plate;

the second polarized light is deflected through the first half wave plate and then transmitted to the dispersive original;

the second polarization beam splitting prism splits the second optical signal into third polarized light and fourth polarized light, the third polarized light is transmitted to a dispersive element, and the fourth polarized light is transmitted to the second half wave plate;

and the second polarized light is deflected through the second half wave plate and then transmitted to the dispersive original.

16. The method of any one of claims 9-15, wherein the fiber array is an array of M (n+1) fibers, M being the number of entrance ports and N being the number of exit ports in the same array as the entrance ports.

17. A light treatment device comprising the wavelength selective switch of any one of claims 1-8.