Optical crossing device and optical transmission system

Abstract

The invention provides an optical cross device and an optical transmission system, and belongs to the technical field of optical communication. The optical cross device comprises a first input and output assembly, a first deflection array, a beam splitting lens, a second deflection array, a first monitor and a second input and output assembly, the beam splitting lens comprises a first lens, a film layer and a second lens which are arranged in sequence, and the first lens and the second lens are the same and are symmetrical about the film layer; the first light beam enters the beam splitting lens through the first input and output assembly and the first deflection array, the beam splitting lens splits the first light beam into signal light and monitoring light, and after the beam splitting lens carries out the same convergence processing on the signal light and the monitoring light, the signal light is output to the second deflection array so as to be output to the second input and output assembly to be output. The monitoring light is output to a first monitor to determine a deflection angle monitoring at the first deflection array. By adopting the optical crossing device, the deflection angle of the light beam in the deflection array can be reduced, and the deflection array can be monitored.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of optical communication technology, in particular to an optical cross device and an optical transmission system. BACKGROUND

[0002] The optical cross device has the characteristics of large capacity and low power consumption, and does not need to be optoelectronic converted, and is a key component of a data center network.

[0003] The current optical cross device is mainly based on a spatial optical scheme, and uses two deflection arrays to realize large-scale optical switching. For example, in the optical cross device, the deflection array is a micro electro mechanical systems (MEMS) mirror array, and by changing the deflection angle of the mirrors in the two MEMS mirror arrays, the connection between any input port and any output port of the optical cross device is realized. When the number of input ports and output ports of the optical cross device increases, the connection area of the corresponding deflection array expands, and under a certain spatial distance, the deflection angle of the deflection array to the incident light beam is required to be larger. SUMMARY

[0004] The present disclosure provides an optical cross device and an optical transmission system, which can not only reduce the deflection angle of the light beam in the deflection array, but also monitor the deflection array.

[0005] In a first aspect, the present disclosure provides an optical cross device, comprising a first input-output component, a first deflection array, a light splitting lens, a second deflection array, a first monitor, and a second input-output component; the first input-output component is configured to output a first light beam to the first deflection array; the first deflection array is configured to reflect the first light beam to the light splitting lens; the light splitting lens comprises a first lens, a film layer, and a second lens arranged in sequence, the first lens and the second lens are the same and are symmetrical about the film layer; the light splitting lens is configured to output the first light beam to the film layer after converging the first light beam through the first lens, split the first light beam into a first signal light and a first monitoring light through the film layer, reflect the first signal light to the first lens, transmit the first monitoring light to the second lens, output the first signal light to the second deflection array after converging the first signal light through the first lens, and output the first monitoring light to the first monitor after converging the first monitoring light through the second lens; the second deflection array is configured to reflect the first signal light to the second input-output component for output; and the first monitor is configured to detect the first monitoring light to determine a first position of the first light beam incident to the first deflection array and deflection information at the first position.

[0006] In the scheme shown in the present disclosure, a light splitting lens is arranged between the two deflection arrays in the optical cross device, the signal light and the monitoring light are separated into two symmetrical light beams by the light splitting lens, the signal light is reflected to the other deflection array for output, and the monitoring light is transmitted to the monitor, and the monitor monitors the deflection array based on the received light signal. In this way, the deflection array can be monitored, and the signal light is reflected once between the two deflection arrays, and the deflection angle of the light beam in the deflection array can also be reduced, so that a larger scale port can be realized at the same deflection angle while monitoring the deflection array.

[0007] In an optional manner, the optical cross device further comprises a second monitor; the second input / output assembly is further configured to output a second light beam to the second deflection array; the second deflection array is further configured to reflect the second light beam to the light splitting lens; the light splitting lens is further configured to output the second light beam to the film layer after converging through the first lens, split the second light beam into second signal light and second monitoring light through the film layer, reflect the second signal light to the first lens, transmit the second monitoring light to the second lens, output the second signal light to the first deflection array after converging through the first lens, and output the second monitoring light to the second monitor after converging through the second lens; the first deflection array is further configured to reflect the second signal light to the first input / output assembly for output; and the second monitor is configured to detect the second monitoring light to determine a second position of the second light beam incident to the second deflection array and deflection information at the second position.

[0008] In the scheme shown in the present disclosure, the optical cross device comprises two deflection arrays, which is a bidirectional transmission optical cross device, and the other deflection array is monitored by the second monitoring device, so that the optical cross device can be comprehensively monitored.

[0009] In an optional manner, the first lens and the second lens are both plano-convex lenses, the plane of the first lens is close to the film layer, and the plane of the second lens is close to the film layer. In this way, the light splitting lens is realized by using a plano-convex lens, which has low implementation difficulty.

[0010] In an optional manner, the film layer is coated on the plane of the first lens, or the film layer is coated on the plane of the second lens. In this way, the structure of the light splitting lens is more compact.

[0011] In an optional manner, the first monitoring light has the same wavelength as the first signal light, and the film layer is an intensity light splitting film layer; the first input / output assembly comprises a first fiber collimation array; and the first fiber collimation array is configured to receive the first light beam and output the first light beam to the first deflection array.

[0012] In the scheme shown in the present disclosure, when the deflection array is monitored, a small part of the received light beam can be separated as monitoring light, without the need to add an additional monitoring light source, and the structure of the optical cross device can be simplified.

[0013] In an optional manner, the first monitoring light and the first signal light are not of the same wavelength, and the film layer is a dichroic light splitting film layer; the first input / output assembly comprises a first fiber collimating array, a first dichroic combiner, and a first monitoring light source; the first fiber collimating array is configured to receive the first signal light and output the first signal light to the first dichroic combiner; the first monitoring light source is configured to output the first monitoring light to the first dichroic combiner; and the first dichroic combiner is configured to combine the first signal light and the first monitoring light into the first light beam and output the first light beam to the first deflection array.

[0014] In the scheme shown in the present disclosure, when the deflection array is monitored, the monitoring light source is used to monitor the deflection array, and the transmission of the signal light is less affected.

[0015] In an optional manner, the first monitor is configured to detect a spot shape of the first monitoring light, obtain the spot shape of the first monitoring light, and determine an incident position of the first monitoring light on the first monitor, the spot shape is used to determine the deflection information of the first light beam at the first position, and the incident position is used to determine the first position. In this way, the deflection array can be monitored based on the spot shape.

[0016] In an optional manner, the first deflection array and the second deflection array are both micro-electro-mechanical system (MEMS) mirror arrays or both liquid crystal on silicon (LCOS).

[0017] In an optional manner, the optical cross device further comprises a controller; the controller is connected to the first monitor and connected to the first deflection array; the first monitor is configured to detect the first monitoring light, obtain first detection information, and send the first detection information to the controller; and the controller is configured to determine the first position and the deflection information of the first light beam at the first position based on the first detection information, and control the first deflection array based on the deflection information of the first light beam at the first position.

[0018] In the scheme shown in the present disclosure, the optical cross device further comprises a controller, and the controller can control the deflection array based on the monitoring information of the monitor, so that the deflection of the light beam is accurate.

[0019] In a second aspect, the present disclosure provides an optical transmission system, comprising at least one optical cross device as described in the first aspect or any optional manner of the first aspect and a plurality of convergence devices.

[0020] Each optical cross device is connected with each of the plurality of convergence devices. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic diagram of an optical cross device based on MEMS mirror array according to an exemplary embodiment of the present disclosure;

[0022] Figure 2 is a structural schematic diagram of an optical transmission system according to an exemplary embodiment of the present disclosure;

[0023] Figure 3 is a structural schematic diagram of an optical cross device according to an exemplary embodiment of the present disclosure;

[0024] Figure 4 is a structural schematic diagram of an optical cross device according to another exemplary embodiment of the present disclosure;

[0025] Figure 5 is a structural schematic diagram of a light splitting lens according to an exemplary embodiment of the present disclosure;

[0026] Figure 6 is an equivalent optical path schematic diagram of optical signal transmission between two deflection arrays according to an exemplary embodiment of the present disclosure;

[0027] Figure 7 is a structural schematic diagram of an optical cross device according to still another exemplary embodiment of the present disclosure;

[0028] Figure 8 is a structural schematic diagram of an optical cross device according to still another exemplary embodiment of the present disclosure.

[0029] BRIEF DESCRIPTION OF DRAWINGS

[0030] 1, first input / output assembly; 2, first deflection array; 3, light splitting lens; 4, second deflection array; 5, first monitor;

[0031] 6, second input / output assembly; 7, second monitor; 8, controller;

[0032] 11, first fiber collimation array; 12, first dichroic combiner; 13, first monitoring light source;

[0033] 31, first lens; 32, film layer; 33, second lens;

[0034] 61, second fiber collimation array; 62, second dichroic combiner; 63, second monitoring light source. DETAILED DESCRIPTION

[0035] To make the purposes, technical solutions, and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in detail with reference to the drawings.

[0036] The use of large models has led to rapid growth of artificial intelligence (AI) computing power. In order to break through the bottleneck of the scale of a traditional electrical switching AI cluster and dynamically configure a network topology architecture, optical cross-connect (OXC) technology is applied in an AI cluster to dynamically configure a network topology. In the OXC technology, an OXC device (also referred to as an optical cross device) is a key device, has large capacity and low power consumption, and does not need to perform photoelectric conversion. The current optical cross device is mainly implemented based on a spatial optical scheme. The optical cross device uses two deflection arrays to implement large-scale optical switching. Referring to Figure 1 , the two deflection arrays are MEMS mirror arrays. By changing the deflection angles of the mirrors in the two MEMS mirror arrays, the connection between any input port and any output port can be achieved. When the number of ports increases, the deflection angle of the mirror is required to be larger. In addition, in order to improve the reliability of the optical cross device, a monitoring system for monitoring the deflection arrays can be integrated in the optical cross device.

[0037] Based on this, the present disclosure provides an optical cross device. The optical cross device is provided with a light splitting lens between two deflection arrays. The light splitting lens separates signal light and monitoring light into two symmetrical beams of light. The signal light continues to be transmitted, and the monitoring light is used to monitor the deflection arrays. Not only can the deflection arrays be monitored, but the signal light can also be reflected, reducing the deflection angle of the light beam in the deflection array, so that a larger scale of ports can be achieved under the same deflection angle while the deflection arrays are monitored.

[0038] The present disclosure provides an optical cross device. The optical cross device can be applied in a data center interconnect (DCI) scenario or a data center internal communication scenario. The scenario uses an optical transmission network composed of optical cross devices, or uses a large-scale all-optical cross data center network. In these application scenarios, the optical cross device is used to forward optical signals.

[0039] When the optical cross device is applied in the DCI scenario, the optical cross device, the aggregation device, and the computing device constitute an optical transmission system. The optical cross device is one or more, the aggregation device is multiple, and can be a switch or a router, etc. The computing device can be a terminal or a server. For each optical cross device in the multiple optical cross devices, the optical cross device is connected to each aggregation device in the multiple aggregation devices through an optical fiber. Each aggregation device is connected to one or more computing devices through an optical fiber, wireless, or cable. The computing devices connected by each aggregation device can constitute a data center. Referring toFigure 2 In Figure 2 which, assuming that the computing device A is connected to the convergence device A, the computing device B is connected to the convergence device B, the convergence device A and the convergence device B are not the same, when the computing device A sends data to the computing device B, the computing device A sends the data to the convergence device A through electrical signals or optical signals, the convergence device A modulates the data to obtain optical signals, and sends the optical signals to the convergence device B, so that the convergence device B sends the data to the computing device B. In Figure 2 which, assuming that the computing device A and the computing device B are connected to the same convergence device, then the computing device A sends data to the connected convergence device through electrical signals or optical signals, and the convergence device sends the data to the computing device B through electrical signals or optical signals without passing through the optical cross device.

[0040] The structure of the optical cross device is described below.

[0041] The optical cross device includes a first input-output component 1, a first deflection array 2, a light-splitting lens 3, a second deflection array 4, a first monitor 5, and a second input-output component 6, wherein the first input-output component 1 and the second input-output component 6 have input-output functions. The first deflection array 2 and the second deflection array 4 have functions of deflecting optical signals and controlling deflection angles. The light-splitting lens 3 has functions of converging and light splitting. For example, the light-splitting lens 3 includes a first lens 31, a film layer 32, and a second lens 33 arranged in sequence, the first lens 31 and the second lens 33 are the same (here, “the same” means that the lens surface parameters, thicknesses, and materials are the same), and the first lens 31 and the second lens 33 are symmetrical about the film layer 32. The first lens 31 and the second lens 33 can be a single lens or a lens group integrated by multiple lenses. The film layer 32 can be an intensity light-splitting film layer capable of splitting a part of a bundle of optical signals according to intensity, or a dichroic light-splitting film layer capable of splitting optical signals of different wavelengths. Since the light-splitting lens 3 has symmetry, the light-splitting lens 3 can also be called a symmetrical lens. The first monitor 5 has a function of detecting optical signals, including but not limited to spot shape and spot position detection.

[0042] The first deflection array 2 is located on an optical path between the first input-output component 1 and the light-splitting lens 3. The light-splitting lens 3 is located on an optical path between the first deflection array 2 and the second deflection array 4, and on an optical path between the first deflection array 2 and the first monitor 5. The second deflection array 4 is located on an optical path between the light-splitting lens 3 and the second input-output component 6. The first monitor 5 is used to monitor the deflection of the first deflection array 2.

[0043] In an alternative way, in order to monitor the deflection of the second deflection array 4, the optical cross device further comprises a second monitor 7 for monitoring the deflection of the second deflection array 4. The beam splitting lens 3 is further located on the light path between the second deflection array 4 and the second monitor 7. The following description is made by taking the example that both the first deflection array 2 and the second deflection array 4 are monitored.

[0044] When the implementation of the film layer 32 is different, the structure of the optical cross device is slightly different, specifically, the structures of the first input-output assembly 1 and the second input-output assembly 6 are different. Figure 3 The structure of the optical cross device corresponding to the film layer 32 being a strong light splitting film layer, Figure 4 The structure of the optical cross device corresponding to the film layer 32 being a dichroic light splitting film layer.

[0045] Referring to Figure 3 , the first input-output assembly 1 comprises a first fiber collimation array 11, the first fiber collimation array 11 comprises a fiber array and a collimation lens array, the fiber array is connected with external optical fibers, in the first fiber collimation array 11, the fiber array and the collimation lens array are integrated together to become a light input-output port array, the first fiber collimation array 11 can be one-dimensional or two-dimensional. The second input-output assembly 6 comprises a second fiber collimation array 61, the second fiber collimation array 61 comprises a fiber array and a collimation lens array, the fiber array is connected with external optical fibers, in the second fiber collimation array 61, the fiber array and the collimation lens array are integrated together to become a light input-output port array, the second fiber collimation array 61 can be one-dimensional or two-dimensional. The optical signal can be input from the first input-output assembly 1 and output from the second input-output assembly 6, or input from the second input-output assembly 6 and output from the first input-output assembly 1.

[0046] In Figure 3 , the transmission process of the optical signal from the first input-output assembly 1 to the second input-output assembly 6 is as follows:

[0047] The first input-output assembly 1 receives a first light beam from an external optical fiber, the first light beam including a single-wavelength optical signal or a multi-wavelength optical signal. The first input-output assembly 1 outputs the first light beam to the first deflection array 2. The first deflection array 2 deflects and reflects the first light beam to output the first light beam to the first lens 31 of the beam-splitting lens 3. After the first lens 31 converges the first light beam, the first light beam is output to the film layer 32. The film layer 32 splits the first light beam into a first signal light and a first monitoring light according to the intensity ratio. The intensity of the first signal light is greater than that of the first monitoring light. The specific splitting ratio can be set according to actual needs, for example, the ratio of the first signal light to the first monitoring light is 95:5, etc. The film layer 32 reflects the first signal light to the first lens 31. After the first lens 31 converges the first signal light, the first signal light is output to the second deflection array 4. The second deflection array 4 controls the first signal light to be output to a specified output port of the second optical fiber collimation array 61 for output. The film layer 32 transmits the first monitoring light to the second lens 33. After the second lens 33 converges the first monitoring light, the first monitoring light is output to the first monitor 5. The first monitor 5 detects the first monitoring light to determine a first position and deflection information of the first light beam at the first position. The first position is the position at which the first light beam is incident on the first deflection array 2. The deflection information includes a deflection angle or a deflection angle deviation, etc. The deflection angle deviation is the difference between the currently determined deflection angle and a first deflection angle. The first deflection angle is the deflection angle required for the first signal light to be incident on the specified position of the second deflection array 4. For example, the first deflection array 2 and the second deflection array 4 are both MEMS mirror arrays, and the specified position is the center position of a specified mirror in the second deflection array 4.

[0048] The above optical signal transmission process is the process of outputting the optical signal from the first input-output assembly 1 to the second input-output assembly 6, and the first monitor 5 monitors the first deflection array 2. Similarly, the optical signal can also be output from the second input-output assembly 6 to the first input-output assembly 1, so that the second monitor 7 monitors the second deflection array 4. The transmission process of the optical signal from the second input-output assembly 6 to the first input-output assembly 1 is as follows:

[0049] The second input-output assembly 6 receives a second light beam from an external optical fiber, and the second light beam includes a single-wavelength optical signal or a multi-wavelength optical signal. The second input-output assembly 6 outputs the second light beam to the second deflection array 4. The second deflection array 4 reflects and deflects the second light beam to output the second light beam to the first lens 31 of the beam-splitting lens 3. After the first lens 31 converges the second light beam, the second light beam is output to the film layer 32. The film layer 32 divides the second light beam into a second signal light and a second monitoring light according to the intensity ratio, and the intensity of the second signal light is greater than that of the second monitoring light. The film layer 32 reflects the second signal light to the first lens 31. After the first lens 31 converges the second signal light, the second signal light is output to the first deflection array 2. The first deflection array 2 controls the second signal light to be output to a specified output port of the first optical fiber collimation array 11 for output. The film layer 32 transmits the second monitoring light to the second lens 33. After the second lens 33 converges the second monitoring light, the second monitoring light is output to the second monitor 7. The second monitor 7 detects the second monitoring light to determine a second position and deflection information of the second light beam at the second position. The second position is a position at which the second light beam is incident on the second deflection array 4. The deflection information includes a deflection angle or a deflection angle deviation, and the deflection angle deviation is a difference between a currently determined deflection angle and a second deflection angle. The second deflection angle is a deflection angle required for the second signal light to be incident on a specified position of the first deflection array 2.

[0050] Referring to Figure 4 , the first input-output assembly 1 includes the first optical fiber collimation array 11, the first dichroic combiner 12, and the first monitoring light source 13. The structure of the first optical fiber collimation array 11 is described above and will not be repeated here. The first dichroic combiner 12 has the function of combining optical signals of different wavelengths into one optical signal. The first monitoring light source 13 can output an optical signal, which can be a single-wavelength optical signal or a multi-wavelength optical signal. The wavelength of the optical signal is different from the wavelength of the optical signal input to the optical cross device. The second input-output assembly 6 includes the second optical fiber collimation array 61, the second dichroic combiner 62, and the second monitoring light source 63. The structure of the second optical fiber collimation array 61 is described above and will not be repeated here. The second dichroic combiner 62 has the function of combining optical signals of different wavelengths into one optical signal. The second monitoring light source 63 can output an optical signal, which can be a single-wavelength optical signal or a multi-wavelength optical signal. The wavelength of the optical signal is different from the wavelength of the optical signal input to the optical cross device.

[0051] In Figure 4 , the transmission process of the optical signal from the first input-output assembly 1 to the second input-output assembly 6 is as follows:

[0052] The first fiber collimating array 11 receives first signal light from an external fiber, the first signal light comprising a single-wavelength light signal or a multi-wavelength light signal. The first fiber collimating array 11 outputs the first signal light to the first dichroic combiner 12, while the first monitoring light source 13 outputs first monitoring light to the first dichroic combiner 12. The first dichroic combiner 12 combines the first signal light and the first monitoring light into a light signal, referred to as a first light beam, and outputs the first light beam to the first deflection array 2. The first deflection array 2 reflects the first light beam by deflection and outputs the first light beam to the first lens 31 of the beam-splitting lens 3. The first lens 31 converges the first light beam and outputs the first light beam to the film layer 32. The film layer 32 separates the first light beam into the first signal light and the first monitoring light according to wavelength. The film layer 32 reflects the first signal light to the first lens 31. The first lens 31 converges the first signal light and outputs the first signal light to the second deflection array 4. The second deflection array 4 controls the first signal light to be output to a specified output port of the second fiber collimating array 61 and output. The film layer 32 transmits the first monitoring light to the second lens 33. The second lens 33 converges the first monitoring light and outputs the first monitoring light to the first monitor 5. The first monitor 5 detects the first monitoring light to determine the first position and deflection information of the first light beam at the first position.

[0053] It should be noted that the first monitoring light output by the first monitoring light source 13 can be incident on each reflection position of the first deflection array 2.

[0054] The above light signal transmission process is a process of outputting the light signal from the first input-output assembly 1 to the second input-output assembly 6, and the first monitor 5 monitors the first deflection array 2. Similarly, the light signal can also be output from the second input-output assembly 6 to the first input-output assembly 1, so that the second monitor 7 monitors the second deflection array 4. The transmission process of the light signal from the second input-output assembly 6 to the first input-output assembly 1 is as follows:

[0055] The second fiber collimating array 61 receives the second signal light from the external fiber, and the second signal light includes a single-wavelength light signal or a multi-wavelength light signal. The second fiber collimating array 61 outputs the second signal light to the second dichroic combiner 62, and the second monitoring light source 63 outputs the second monitoring light to the second dichroic combiner 62, and the second dichroic combiner 62 combines the second signal light and the second monitoring light into a light signal, referred to as a second light beam, and outputs the second light beam to the second deflection array 4. The second deflection array 4 deflects and reflects the second light beam to output the second light beam to the first lens 31 of the light splitting lens 3, and the first lens 31 converges the second light beam to output the second light beam to the film layer 32, and the film layer 32 divides the second light beam into the second signal light and the second monitoring light according to the wavelength. The film layer 32 reflects the second signal light to the first lens 31, and the first lens 31 converges the second signal light to output the second signal light to the first deflection array 2. The first deflection array 2 controls the second signal light to be output to the specified output port of the first fiber collimating array 11 for output. The film layer 32 transmits the second monitoring light to the second lens 33, and the second lens 33 converges the second monitoring light to output the second monitoring light to the second monitor 7. The second monitor 7 detects the second monitoring light to determine the second position and the deflection information of the second light beam at the second position.

[0056] It should be noted that the second monitoring light output by the second monitoring light source 63 can be incident to each reflection position of the second deflection array 4.

[0057] It should be noted that the first dichroic combiner 12 can combine the first signal light and the first monitoring light by the difference between the upper surface and the lower surface, for example, the lower surface of the first dichroic combiner 12 is coated with a film that reflects the first signal light, and the upper surface is coated with a film that transmits the first monitoring light, so that the first signal light is combined with the reflected and transmitted first monitoring light. Similarly, the second dichroic combiner 62 can combine the second signal light and the second monitoring light by the difference between the upper surface and the lower surface.

[0058] The optical cross device shown in Figure 4 can avoid the energy loss of the signal light caused by the signal light splitting a certain proportion of energy as monitoring light, so that Figure 4 the optical cross device shown in Figure 4 is more suitable for optical transmission networks that require low insertion loss of the optical cross device and are difficult to receive additional loss of the signal light.

[0059] In Figure 3 and Figure 4In the illustrated optical cross device, the first signal light passes through the first lens 31 twice, the first monitoring light passes through the first lens 31 once and passes through the second lens 33 once. Since the second lens 33 is completely identical to the first lens 31, it is equivalent that the first monitoring light also passes through the first lens 31 twice. The first lens 31 plays a role of converging, and then the light beam is focused after converging, so that the deflection angle of the first signal light on the first deflection array 2 is reduced. Based on the same reason, the deflection angle of the second signal light is also reduced.

[0060] In addition, in Figure 3 In the illustrated optical cross device, since the first lens 31 and the second lens 33 are identical and symmetrical about the film layer 32, the spot shape and the position coordinates of the first signal light and the first monitoring light are the same when the first signal light and the first monitoring light are output from the beam splitter lens 3. The spot shape includes shape and size.

[0061] In Figure 4 In the illustrated optical cross device, since the first monitoring light and the first signal light come from different light sources, the spot shape of the first monitoring light and the first signal light is not the same when the first monitoring light and the first signal light are incident on the first deflection array 2. Then, the spot shape of the first signal light and the first monitoring light may be not the same when the first signal light and the first monitoring light are output from the beam splitter lens 3, but the position coordinates are the same.

[0062] In an alternative way, for the beam splitter lens 3 described in the foregoing, the first lens 31, the film layer 32 and the second lens 33 can be integrated together or can be implemented separately.

[0063] In an alternative way, referring to Figure 5 In the beam splitter lens 3, the first lens 31 and the second lens 33 are both plano-convex lenses, which include a plane and a convex surface, and the convex surface includes but is not limited to a spherical surface, an aspherical surface or a super surface, etc. The plane of the first lens 31 is close to the film layer 32, and the convex surface is away from the film layer 32. The plane of the second lens 33 is close to the film layer 32, and the convex surface is away from the film layer 32. In this way, the beam splitter lens 3 can be equivalent to a Fourier lens, referring to Figure 6 the principle diagram illustrated.

[0064] Alternatively, the film layer 32 is implemented by coating on the plane of the first lens 31, or the film layer 32 is implemented by coating on the plane of the second lens 33. In these two cases, the film layer 32 is closely attached to the second lens 33.

[0065] In an alternative way, the first deflection array 2 and the second deflection array 4 are both MEMS mirror arrays, by applying corresponding voltages to the mirrors in the MEMS mirror arrays, the mirrors can be deflected by a certain angle in X and Y directions, realizing two-dimensional deflection. The center position of each mirror in the MEMS mirror array has the highest reflection efficiency, by controlling the first deflection array 2 to make the first signal light incident to the center position of the designated mirror in the second deflection array 4, and by controlling the second deflection array 4 to make the second signal light incident to the center position of the designated mirror in the first deflection array 2. For the first deflection array 2, each mirror in the MESM mirror array corresponds to one port of the first fiber collimation array 11, and different mirrors correspond to different ports, for the second deflection array 4, each mirror in the MESM mirror array corresponds to one port of the second fiber collimation array 61, and different mirrors correspond to different ports.

[0066] Alternatively, the first deflection array 2 and the second deflection array 4 are both liquid crystal on silicon (LCOS), by controlling the voltage applied to the LCOS, the incident light beam can be deflected by a certain angle in X and Y directions, realizing two-dimensional deflection.

[0067] It should be noted that the above is only an example of the first deflection array 2 and the second deflection array 4, and any device for deflecting optical signals can be applied to the above optical cross device.

[0068] In an alternative way, in the optical cross device shown in Figure 3 and Figure 4 The first monitor 5 and the second monitor 7 can include but are not limited to charged coupled device (CCD), camera and other image sensing devices.

[0069] In an alternative way, in the optical cross device shown in Figure 3 and Figure 4The first monitor 5 includes a plurality of detection units, each detection unit corresponding to an incident position of the second deflection array 4, for example, each detection unit corresponding to a mirror of the MEMS mirror array. The first monitor 5 detects the spot pattern of the first monitoring light to obtain the spot pattern of the first monitoring light, which is used to determine the deflection information of the first signal light at the first deflection array 2. For example, when the optical cross device is set, the calibration spot pattern of the signal light at the first position is incident on each detection unit, and the corresponding deflection angle is recorded. The difference between the spot pattern of the first monitoring light and the first spot pattern is determined, which is called the first difference. In the corresponding relationship between the difference range and the deviation value, the deviation value corresponding to the difference range to which the first difference belongs is determined. The deviation value is added to the deflection angle corresponding to the first spot pattern to obtain the deflection angle of the first monitoring light at the first deflection array 2. The first spot pattern is the calibration spot pattern corresponding to the detection unit used by the first monitoring light. And the first monitor 5 determines the first incident position of the first monitoring light incident on itself, which can correspond to the second incident position of the second deflection array 4. The second incident position is the position of the first signal light incident on the second deflection array 4. Since the position of the first signal light incident on the second deflection array 4 is known when the voltage is applied to the first position, the first position can be deduced using the second incident position.

[0070] It should be noted that other devices such as lenses can be provided between the light splitting lens 3 and the first monitor 5, which can change the spot pattern of the first monitoring light. At this time, the deflection angle can be obtained based on the transformed spot pattern through transformation.

[0071] In addition, in the optical cross device shown in Figure 3 and Figure 4 The detection principle of the spot pattern based on the second monitor 7 is the same as that of the first monitor 5, which will not be described here.

[0072] In an optional manner, in order to facilitate the control of the optical cross device, the optical cross device further includes a controller 8, which is described in detail in Figure 7 and Figure 8The controller 8 is electrically connected with the first monitor 5, and the controller 8 is electrically connected with the first deflection array 2. The electrical connection refers to the connection through wires. The first monitor 5 detects the first monitoring light to obtain first detection information, and the first detection information includes the spot shape of the first monitoring light. The first monitor 5 sends the first detection information to the controller 8. The controller 8 receives the first detection information, and uses the first detection information to calculate the deflection angle of the first light beam at the first deflection array 2. Then the controller 8 uses the deflection angle to control the voltage of the first position of the first deflection array 2, so that the subsequent signal light incident to the first position is incident to the specified position of the second deflection array 4. For example, the first deflection array 2 and the second deflection array 4 are both MEMS mirror arrays, and by controlling the deflection of the mirror to which the first position belongs, the first signal light is incident to the center position of the specified mirror in the MEMS mirror array.

[0073] In an optional manner, in order to facilitate the control of the optical cross device, the optical cross device further includes a controller 8, as shown in Figure 7 and Figure 8 The controller 8 is electrically connected with the second monitor 7, and the controller 8 is electrically connected with the second deflection array 4. The second monitor 7 detects the second monitoring light to obtain second detection information, and the second detection information includes the spot shape of the second monitoring light. The second monitor 7 sends the second detection information to the controller 8. The controller 8 receives the second detection information, and uses the second detection information to calculate the deflection angle of the second light beam at the second deflection array 4. Then the controller 8 uses the deflection angle to control the voltage of the second position of the second deflection array 4, so that the subsequent signal light incident to the second position is incident to the specified position of the first deflection array 2. For example, the first deflection array 2 and the second deflection array 4 are both MEMS mirror arrays, and by controlling the deflection of the mirror to which the second position belongs, the second signal light is incident to the center position of the specified mirror in the MEMS mirror array.

[0074] In the embodiments of the present disclosure, in the optical cross device, by arranging the light splitting lens 3, the deflection angle of the light beam can be reduced while monitoring the deflection array, so as to reduce the deflection angle of the mirror in the MEMS mirror array, or realize a larger scale port under the same deflection angle.

[0075] The terms "first" and "second" and the like in the present disclosure are used to distinguish between similar elements or items that have substantially the same function and are not intended to imply a logical or chronological relationship between them. It should be understood that there is no logical or chronological relationship between "first" and "second", and the number and execution order are not limited. It should also be understood that although the following description uses the terms "first" and "second" and the like to describe various elements, these elements should not be limited by the terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of various examples, a first input output component can be referred to as a second input output component, and similarly, a second input output component can be referred to as a first input output component. The first input output component and the second input output component can both be input output components, and in some cases, can be separate and distinct input output components.

[0076] In the present disclosure, the term "at least one" means one or more, and the term "multiple" means two or more.

[0077] The above description is only an exemplary embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present disclosure, and these modifications or replacements should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. An optical cross-connect device, characterized by The optical cross device comprises a first input-output component (1), a first deflection array (2), a light splitting lens (3), a second deflection array (4), a first monitor (5) and a second input-output component (6); The first input-output component (1) is configured to output a first light beam to the first deflection array (2); The first deflection array (2) is configured to reflect the first light beam to the light splitting lens (3); The light splitting lens (3) comprises a first lens, a film layer and a second lens arranged in sequence, the first lens and the second lens are the same and are symmetrical about the film layer; the light splitting lens (3) is configured to output the first light beam to the film layer after converging the first light beam through the first lens, split the first light beam into a first signal light and a first monitoring light through the film layer, reflect the first signal light to the first lens, transmit the first monitoring light to the second lens, output the first signal light to the second deflection array (4) after converging the first signal light through the first lens, and output the first monitoring light to the first monitor (5) after converging the first monitoring light through the second lens; The second deflection array (4) is configured to reflect the first signal light to the second input-output component (6) for output; The first monitor (5) is configured to detect the first monitoring light to determine a first position of the first light beam incident to the first deflection array (2) and deflection information at the first position.

2. The optical cross-connect device of claim 1, wherein, The optical cross device further comprises a second monitor (7); The second input-output component (6) is further configured to output a second light beam to the second deflection array (4); The second deflection array (4) is further configured to reflect the second light beam to the light splitting lens (3); The light splitting lens (3) is further configured to output the second light beam to the film layer after converging the second light beam through the first lens, split the second light beam into a second signal light and a second monitoring light through the film layer, reflect the second signal light to the first lens, transmit the second monitoring light to the second lens, output the second signal light to the first deflection array (2) after converging the second signal light through the first lens, and output the second monitoring light to the second monitor (7) after converging the second monitoring light through the second lens; The first deflection array (2) is further configured to reflect the second signal light to the first input-output component (1) for output; The second monitor (7) is configured to detect the second monitoring light to determine a second position of the second light beam incident to the second deflection array (4) and deflection information at the second position.

3. The optical cross-connect device according to claim 1 or 2, characterized by The first lens and the second lens are both plano-convex lenses, the plane of the first lens is close to the film layer, and the plane of the second lens is close to the film layer.

4. The optical cross-connect device of claim 3, wherein, The film layer is plated on the plane of the first lens, or the film layer is plated on the plane of the second lens.

5. The optical cross-connect device according to any one of claims 1 to 4, characterized by The first monitoring light and the first signal light have the same wavelength, and the film layer is an intensity light splitting film layer; The first input-output component (1) comprises a first fiber collimation array (11); The first fiber collimating array (11) is configured to receive the first light beam and output the first light beam to the first deflection array (2).

6. The optical cross-connect device according to any one of claims 1 to 5, wherein, The first monitoring light and the first signal light are different in wavelength, and the film layer is a dichroic light splitting film layer. The first input / output component (1) comprises a first fiber collimating array (11), a first dichroic combiner (12), and a first monitoring light source (13). The first fiber collimating array (11) is configured to receive the first signal light and output the first signal light to the first dichroic combiner (12). The first monitoring light source (13) is configured to output the first monitoring light to the first dichroic combiner (12). The first dichroic combiner (12) is configured to combine the first signal light and the first monitoring light into the first light beam and output the first light beam to the first deflection array (2).

7. The optical cross-connect device according to any one of claims 1 to 6, wherein, The first monitor (5) is configured to detect a spot shape of the first monitoring light, obtain the spot shape of the first monitoring light, and determine an incident position of the first monitoring light on the first monitor (5), wherein the spot shape is used to determine deflection information of the first light beam at the first position, and the incident position is used to determine the first position.

8. The optical cross-connect device according to any one of claims 1 to 7, wherein, The first deflection array (2) and the second deflection array (4) are both micro-electro-mechanical system (MEMS) mirror arrays or both liquid crystal on silicon (LCOS).

9. The optical cross-connect device of any of claims 1 to 8, wherein, The optical cross device further comprises a controller (8); The controller (8) is connected with the first monitor (5) and the first deflection array (2). The first monitor (5) is configured to detect the first monitoring light to obtain first detection information and send the first detection information to the controller (8). The controller (8) is configured to determine the first position and deflection information of the first light beam at the first position based on the first detection information, and control the first deflection array (2) based on the deflection information of the first light beam at the first position.

10. An optical transmission system, characterized by, The optical cross device comprises at least one optical cross device as claimed in any one of claims 1 to 9 and a plurality of convergence devices. Each optical cross device is connected with each convergence device of the plurality of convergence devices.

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