Compact optical switch for realizing multipath parallel protection

Abstract

The utility model provides a compact optical switch for realizing multipath parallel protection, which comprises an incident optical fiber array, an incident lens array, an emergent lens array and an emergent optical fiber array which are sequentially arranged along an optical path, a movable reflecting device is further arranged between the incident lens array and the emergent lens array, the movable reflecting device is driven by a driver, and the incident optical fiber array, the incident lens array, the emergent lens array and the emergent optical fiber array are arranged in parallel. The driver drives the movable reflecting device to move between a first position and a second position; the compact optical switch further comprises a first protection reflection device, and the first protection reflection device is located on the light emitting side of the protection lens array. When the movable reflection device is located at the first position, an optical signal emitted from the incident lens array enters the emergent lens array, and when the movable reflection device is located at the second position, the optical signal emitted from the incident lens array is reflected by the movable reflection device and does not enter the emergent lens array. An optical signal emitted from the protection lens array is reflected by the first protection reflection device, is incident to the movable reflection device, is reflected by the movable reflection device, and is incident to the emission lens array. The size of the optical switch can be reduced, and miniaturization of the optical switch is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of optical communication devices, and specifically, to a compact optical switch for realizing multi-channel parallel protection. Background Art

[0002] With the development of optical communication technology, optical devices are widely used in fiber optic communication systems. Some existing optical switches have multiple channels, and each channel transmits optical signals independently. However, if the incident optical signal is abnormal, it is likely to cause the abnormal signal after output. Therefore, the optical switch needs to detect whether the signal is abnormal. Once an abnormality is found, the abnormal channel needs to be processed.

[0003] The existing method is to set a reflecting prism in the optical switch and use the reflecting prism to reflect the abnormal optical signal. For example, the invention patent application with the publication number CN102707389A discloses a 1×2 optical switch array module, which is provided with a module package body and a plurality of 1×2 optical switches. The optical switches are all arranged in the module package body. Any one of the optical switches includes an input / output double-fiber collimator, a single-fiber collimator, a total reflecting mirror, and a switching prism. The total reflecting mirror and the input / output double-fiber collimator form a total reflection optical path. The single-fiber collimator is located outside the total reflection optical path. The switching prism is fixed on the rocker arm of the relay and has two staying positions. The single-fiber collimator, the switching prism, and the input end of the input / output double-fiber collimator form a switching refraction optical path.

[0004] However, in the existing solutions, one prism is only used to reflect the optical signal of one channel, resulting in a large number of reflecting prisms in the optical switch, which increases the volume of the optical switch and also increases the production cost of the optical switch. Moreover, each optical path channel of the above solution needs to be provided with an input / output double-fiber collimator and a single-fiber collimator, that is, each optical path needs three optical fibers, resulting in a large number of optical fibers used, which is not conducive to the miniaturization of the volume of the optical switch. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a compact optical switch for realizing multi-channel parallel protection and reducing the volume.

[0006] To achieve the above object, the compact optical switch for realizing multi-channel parallel protection provided by the present utility model includes: an incident fiber array, an incident lens array, an exit lens array, and an exit fiber array arranged in sequence along the optical path. A movable reflection device is further arranged between the incident lens array and the exit lens array. The movable reflection device is driven by a driver, and the driver drives the movable reflection device to move between a first position and a second position. Among them, the compact optical switch further includes a first protection reflection device, and the first protection reflection device is located on the light-emitting side of the protection lens array. When the movable reflection device is in the first position, the optical signal emitted from the incident lens array is incident on the exit lens array. When the movable reflection device is in the second position, the optical signal emitted from the incident lens array is reflected by the movable reflection device and not incident on the exit lens array. The optical signal emitted from the protection lens array is reflected by the first protection reflection device and incident on the movable reflection device, and then incident on the exit lens array after being reflected by the movable reflection device.

[0007] As can be seen from the above solution, the movable reflection device of the compact optical switch for realizing multi-channel parallel protection of the present utility model corresponds to an incident lens array, and there are multiple lenses in an incident lens array. That is, a movable reflection device can reflect the optical signals of multiple channels. In this way, the number of movable reflection devices that need to be arranged in the optical switch is small, and the volume of the compact optical switch for multi-channel parallel protection can be reduced.

[0008] A preferred solution is that the number of incident fiber arrays is equal to and corresponds one-to-one with the number of incident lens arrays, and the number of incident fiber arrays is more than one; the number of exit lens arrays is equal to and corresponds one-to-one with the number of exit fiber arrays, and the number of exit fiber arrays is more than one.

[0009] Thus, an incident fiber array, an incident lens array, an exit lens array, and an exit fiber array are correspondingly arranged for a group of optical path channels. Therefore, a group of optical path channels can transmit multiple optical signals, thereby increasing the capacity of the optical signals transmitted by the optical switch.

[0010] A further solution is that the first protection reflection device is located on one side of the movable reflection device. In this way, each first protection reflection device can be closely arranged, which is beneficial to reducing the volume of the optical switch.

[0011] An optional solution is that the number of movable reflection devices is more than two, and the first protection reflection device is located in the middle of the arrangement direction of the multiple movable reflection devices; the compact optical switch further includes a second protection reflection device, and the second protection reflection device is located in the middle of the arrangement direction of the multiple movable reflection devices, and the second protection reflection device is driven by a protection driver to move between a third position and a fourth position.

[0012] It can be seen that the optical path difference of the optical signal reflected by the first protective reflection device to the movable reflection devices at both ends is small, which is beneficial to improving the performance of the optical switch.

[0013] A further solution is that when the second protective reflection device is in the third position, it does not reflect the optical signal emitted from the protective lens array; when the second protective reflection device is in the fourth position, the optical signal emitted from the protective lens array is reflected by the second protective reflection device and then enters the output lens array after passing through a movable reflection device located in the second position.

[0014] It can be seen that by setting two protective reflection devices, the optical signal can be better reflected to the movable reflection devices on both sides.

[0015] A further solution is that along the light output direction of the protective lens array, the second protective reflection device is located on the upstream side of the first protective reflection device.

[0016] A further solution is that the reflection surface of the first protective reflection device faces the first side of the arrangement direction of the multiple movable reflection devices, and the reflection surface of the second protective reflection device faces the second side of the arrangement direction of the multiple movable reflection devices.

[0017] In this way, the two protective reflection devices can respectively reflect the optical signal to the multiple movable reflection devices on both sides, thereby reducing the optical path difference of the optical signal reflected to the multiple movable reflection devices on both sides.

[0018] A further solution is that the driver includes a relay and a cantilever. The relay drives the first end of the cantilever, and the movable reflection device is fixed to the second end of the cantilever.

[0019] It can be seen that the relay drives the cantilever to rotate, and drives the movement of the movable reflection device through the cantilever, making the movement control of the movable reflection device more accurate.

[0020] A further solution is that the multiple movable reflection devices are arranged in a one-dimensional direction, and the relays of the multiple drivers are alternately arranged on both sides of the movable reflection device. Further, the multiple relays on the same side are closely arranged.

[0021] It can be seen that the multiple relays are closely arranged, making the arrangement of the multiple drivers very compact, which is beneficial to reducing the volume of the optical switch. Description of the Drawings

[0022] Figure 1 is a structural diagram of the first embodiment of the compact optical switch for multi-channel parallel protection of the present invention when it is not in the protection state.

[0023] Figure 2 is a structural diagram of the first embodiment of the compact optical switch for multi-channel parallel protection of the present invention when it is in the protection state.

[0024] Figure 3 It is a structural diagram of a reflection device and a driver of the first embodiment of the compact optical switch for realizing multi-channel parallel protection of the present utility model.

[0025] Figure 4 It is a structural diagram of multiple reflection devices and multiple drivers of the first embodiment of the compact optical switch for realizing multi-channel parallel protection of the present utility model.

[0026] Figure 5 It is a structural diagram of the second embodiment of the compact optical switch for realizing multi-channel parallel protection of the present utility model when it is not in the protection state.

[0027] Figure 6 It is a structural diagram of the second embodiment of the compact optical switch for realizing multi-channel parallel protection of the present utility model when it is in the first protection state.

[0028] Figure 7 It is a structural diagram of the second embodiment of the compact optical switch for realizing multi-channel parallel protection of the present utility model when it is in the second protection state

[0029] Figure 8 It is a structural diagram of multiple reflection devices and multiple drivers of the second embodiment of the compact optical switch for realizing multi-channel parallel protection of the present utility model.

[0030] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments. Specific embodiments

[0031] A plurality of movable reflection devices are provided in the compact optical switch for realizing multi-channel parallel protection of the present utility model. By driving the movement of the movable reflection devices, the protection of the optical path with abnormal optical signals is realized. Moreover, one movable reflection device can protect multiple optical signals, which can reduce the number of movable reflection devices provided in the optical switch, thereby reducing the volume of the optical switch.

[0032] First embodiment:

[0033] Refer to Figure 1 , this embodiment is a 1:8 compact optical switch that realizes 8-channel simultaneous protection. The optical switch includes eight groups of optical path channels. Among them, one group of optical path channels includes an incident fiber array, an incident lens array, an exit lens array, and an exit fiber array arranged in sequence along the optical path direction, as Figure 1Among them, the leftmost group of optical path channels includes an incident fiber array 111, an incident lens array 112, an exit lens array 114, and an exit fiber array 115. Among them, the incident fiber array 111 is a 1×8 incident fiber array with eight incident fibers, the incident lens array 112 is a 1×8 lens array, and eight incident lenses are arranged in the incident lens array 112. Correspondingly, the exit lens array 114 is a 1×8 lens array, eight exit lenses are arranged in the exit lens array 114, and the exit fiber array 115 is a 1×8 exit fiber array with eight exit fibers. Further, the numbers of the incident fiber array 111, the incident lens array 112, the exit lens array 114, and the exit fiber array 115 are equal and are arranged in one-to-one correspondence.

[0034] A movable reflection device 113 is further arranged between the incident lens array 112 and the exit lens array 114. The movable reflection device 113 is driven by a driver, and the driver drives the movable reflection device 113 to move between a first position and a second position. Figure 1 In [the figure], the movable reflection device 113 is in the first position. At this time, the movable reflection device 113 does not block the optical path between the incident lens array 112 and the exit lens array 114. Therefore, it is represented in the form of a dotted line.

[0035] The structures of the other seven groups of optical path channels in the optical switch of this embodiment are the same as those of the leftmost optical path channel. For example, the second group of optical path channels includes an incident fiber array 121, an incident lens array 122, an exit lens array 124, and an exit fiber array 125. And a movable reflection device 123 is further arranged between the incident lens array 122 and the exit lens array 124. The structures of the other optical path channels are the same and will not be elaborated here.

[0036] A protection fiber array 151, a protection lens array 152, and a protection reflection device 153 are further arranged in the optical switch. The protection reflection device 153 is the first protection reflection device of this embodiment, is located on the light-emitting side of the protection lens array 152, and can reflect the optical signal emitted from the protection lens array 152. And the position of the protection reflection device 153 is fixed, that is, the protection reflection device 153 cannot move. Therefore, there is no need to set a driver to drive the protection reflection device 153 to move.

[0037] From Figure 1 It can be seen that a total of eight groups of optical path channels are arranged in this embodiment. Therefore, eight movable reflection devices are arranged, and the eight movable reflection devices are arranged in a straight line. The protection reflection device 153 is located on one side of the multiple movable reflection devices. In this embodiment, each movable reflection device and the protection reflection device 153 are a right-angled prism, and the optical signal is reflected by the reflection surface of the right-angled prism.

[0038] As Figure 1 shown, when there is no abnormality in each of the multiple optical signals in each of the eight optical path channels, such as abnormal optical power of the optical signal, the optical switch is in an unprotected state, that is, each movable reflection device is in the first position, and each movable reflection device does not block between the incident lens array and the outgoing lens array in this group of optical path channels. Taking the leftmost optical path channel as an example, the optical signal emitted from the incident lens array 112 can directly enter the outgoing lens array 114 through L11 without being reflected by the movable reflection device 113. Similarly, the optical signal emitted from the incident lens array 122 can directly enter the outgoing lens array 124 through L12.

[0039] At this time, the optical signal L13 emitted from the protection lens array 152 is reflected by the protection reflection device 153 to form an optical signal L14, which will be emitted along the left direction and will not be received by any outgoing lens array.

[0040] As Figure 2 shown, assuming that the optical signal in one of the optical path channels is abnormal, for example, the optical signal L21 emitted from the incident lens array 142 through the incident optical fiber array 141 is abnormal, then the movable reflection device 143 in this group of optical path channels is driven to the second position, that is, the movable reflection device 143 is in a protected state. At this time, the movable reflection device 143 blocks the optical path between the incident lens array 142 and the outgoing lens array 144. Therefore, Figure 2 the movable reflection device 143 is represented by a solid line in

[0041] In this way, the optical signal L21 emitted from the incident lens array 142 will be reflected by the movable reflection device 143 and form an optical signal L22, which is emitted along the left direction and will not be received by the outgoing lens array 144. At this time, the optical signal L23 emitted from the protection lens array 152 is reflected by the protection reflection device 153 to form an optical signal L24. The optical signal L24 is reflected after entering the movable reflection device 143, forms an optical signal L25 and enters the outgoing lens array 144, and finally is emitted from the outgoing optical fiber array 145.

[0042] In this way, once the optical signal in any optical path channel is abnormal, the movable reflection device in this group of optical path channels can be moved to the second position, so that the abnormal optical signal will not be emitted from the outgoing lens array of this group of optical path channels, and the optical signal emitted from the protection lens array will be reflected and enter the outgoing lens array of this group of optical path channels to replace the abnormal optical signal.

[0043] The following is combined with Figure 3Introduce the driving mechanism of the movable reflection device 143. The incident fiber optic array 141, the incident lens array 142, the exit lens array 144, and the exit fiber optic array 145 are located on the upper side of the movable reflection device 143. The driver of the movable reflection device 143 includes a relay 174 and a cantilever 184. The relay 174 is connected to the first end of the cantilever 184 and can drive the cantilever 184 to rotate around the relay 174. The movable reflection device 143 is fixed to the second end of the cantilever 184. When the movable reflection device 143 is in the first position, as shown by the solid line in Figure 3 the movable reflection device 143 does not block the space between the incident lens array 142 and the exit lens array 144. When the movable reflection device 143 is in the second position, as shown by the dashed line in Figure 3 the movable reflection device 143 blocks the space between the incident lens array 142 and the exit lens array 144 and reflects the optical signal emitted from the incident lens array 142.

[0044] Of course, in other embodiments, the movable reflection device 143 can also be driven by a driver composed of an electromagnet or a displacement stage, etc.

[0045] To reduce the volume of the optical switch, it is necessary to reasonably arrange multiple movable reflection devices, the protective reflection device 153, and multiple drivers. Therefore, as shown in Figure 4 in this embodiment, eight relays, eight movable reflection devices, and the protective reflection device are closely arranged. Specifically, the eight movable reflection devices 113, 123, 143, and the protective reflection device 153 are arranged in a straight line. The eight relays are respectively arranged on both sides of the straight line formed by the movable reflection devices 113, 123, 143, and the protective reflection device 153. As shown in Figure 4 four relays are arranged on the upper side, including the relay 171, 173, etc., and four relays are also arranged on the lower side, including the relay 172, 174, etc. Moreover, each relay is connected to the corresponding movable reflection device through a cantilever. For example, the relay 171 is connected to the movable reflection device 113 through the cantilever 181, the relay 172 is connected to the movable reflection device 123 through the cantilever 182, the relay 173 is connected to the movable reflection device 133 through the cantilever 183, and the relay 174 is connected to the movable reflection device 143 through the cantilever 184, and so on. And, the relays corresponding to two adjacent movable reflection devices are respectively located on the upper side and the lower side, that is, the relays corresponding to two adjacent movable reflection devices are not arranged adjacent to each other, but are arranged at intervals. In addition, the two adjacent relays on the same side are closely arranged, that is, the gap between the two adjacent relays on the same side is minimized as much as possible. This arrangement can minimize the difference in the working distances of the lens arrays of different ports, so as to ensure that the coupling efficiency of the optical signal to different output ports is almost the same.

[0046] Second Embodiment:

[0047] This embodiment is a compact 1:8 optical switch that realizes 8-channel simultaneous protection. The optical switch includes eight groups of optical path channels. Among them, one group of optical path channels includes an incident fiber array, an incident lens array, an exit lens array, and an exit fiber array arranged in sequence along the optical path direction, as Figure 5 shown. The leftmost group of optical path channels includes an incident fiber array 211, an incident lens array 212, an exit lens array 214, and an exit fiber array 215. Among them, the incident fiber array 211 is a 1×8 incident fiber array with eight incident fibers. The incident lens array 212 is a 1×8 lens array, and eight incident lenses are arranged in the incident lens array 212. Correspondingly, the exit lens array 214 is a 1×8 lens array, eight exit lenses are arranged in the exit lens array 214, and the exit fiber array 215 is a 1×8 exit fiber array with eight exit fibers.

[0048] A movable reflection device 213 is further arranged between the incident lens array 212 and the exit lens array 214. The movable reflection device 213 is driven by a driver, and the driver drives the movable reflection device 213 to move between a first position and a second position. Figure 5 shown, the movable reflection device 213 is in the first position. At this time, the movable reflection device 213 does not block the optical path between the incident lens array 212 and the exit lens array 214. Therefore, it is represented in a dotted line form.

[0049] The structures of the other seven groups of optical path channels in the optical switch of this embodiment are the same as those of the leftmost optical path channel. For example, the second group of optical path channels includes an incident fiber array 221, an incident lens array 222, an exit lens array 224, and an exit fiber array 225. A movable reflection device 223 is further arranged between the incident lens array 222 and the exit lens array 224. The structures of the other optical path channels are the same and will not be elaborated here.

[0050] A protective optical fiber array 251, a protective lens array 252, and a first protective reflection device 253 are further provided inside the optical switch. The position of the first protective reflection device 253 is fixed and does not require a driver for driving. Additionally, a second protective reflection device 254 is provided between the protective lens array 252 and the first protective reflection device 253. The second protective reflection device 254 is a movable reflection device and requires a set of drivers to drive the second protective reflection device 254 to move between a third position and a fourth position. The first protective reflection device 253 and the second protective reflection device 254 are both located on the light-emitting side of the protective lens array 252 and can reflect the optical signals emitted from the protective lens array 252. Additionally, the reflection surface of the first protective reflection device 253 faces the first side in the arrangement direction of the plurality of movable reflection devices, and the reflection surface of the second protective reflection device 254 faces the second side in the arrangement direction of the plurality of movable reflection devices.

[0051] From Figure 5 It can be seen that a total of eight groups of optical path channels are provided in this embodiment. Therefore, eight movable reflection devices are provided. Different from the first embodiment, in this embodiment, the first protective reflection device 253 and the second protective reflection device 254 are located in the middle of the plurality of movable reflection devices. For example, the eight groups of optical path channels are divided into two parts, and each part has four groups of optical path channels. The first protective reflection device 253 and the second protective reflection device 254 are between the optical path channels of the two parts. That is, there are four movable reflection devices on both the left and right sides of the first protective reflection device 253 and the second protective reflection device 254.

[0052] As Figure 5 shown, when there is no abnormal situation in each group of multiplexed optical signals in the eight groups of optical path channels, such as abnormal optical power of the optical signal, the optical switch is in an unprotected state, that is, each movable reflection device is in the first position, and each movable reflection device does not block between the incident lens array and the output lens array of the optical path channel of that group. Additionally, the second protective reflection device 254 is also in the third position and does not reflect the optical signals emitted from the protective lens array 252.

[0053] Taking the leftmost optical path channel as an example, the optical signal emitted from the incident lens array 212 can directly enter the output lens array 214 through L31 without being reflected by the movable reflection device 213. At this time, the optical signal L33 emitted from the protective lens array 252 is reflected by the first protective reflection device 253 to form an optical signal L34, which will be emitted along the right side direction and will not be received by any output lens array.

[0054] As Figure 6As shown, assume that an abnormal situation occurs in the optical signal of one of the groups of optical path channels on the left. For example, the optical signal L51 emitted by the incident lens array 262 through the incident fiber array 261 is abnormal. Then, the movable reflection device 263 of this group of optical path channels is driven to the second position, that is, the movable reflection device 263 is in a protected state. At this time, the movable reflection device 263 blocks the optical path between the incident lens array 262 and the output lens array 264. Therefore, Figure 6 In, the movable reflection device 263 is represented by a solid line. At this time, the optical signal L51 emitted by the incident lens array 262 will be reflected by the movable reflection device 263 and form an optical signal L52, which is emitted along the left direction and will not be received by the output lens array 264.

[0055] In addition, the second protection reflection device 254 also needs to be driven to the fourth position. At this time, the second protection reflection device 254 blocks the optical path between the protection lens array 252 and the first protection reflection device 253. The optical signal L41 emitted by the protection lens array 252 is reflected by the second protection reflection device 254 to form an optical signal L42. The optical signal L42 is reflected after entering the movable reflection device 263, forms an optical signal L43 and enters the output lens array 264, and finally is emitted from the output fiber array 265.

[0056] See Figure 7 , assume that an abnormal situation occurs in the optical signal of one of the groups of optical path channels on the right. For example, the optical signal L71 emitted by the incident lens array 272 through the incident fiber array 271 is abnormal. Then, the movable reflection device 273 of this group of optical path channels is driven to the second position, that is, the movable reflection device 273 is in a protected state. At this time, the movable reflection device 273 blocks the optical path between the incident lens array 272 and the output lens array 274. Therefore, Figure 7 In, the movable reflection device 273 is represented by a solid line.

[0057] At this time, the optical signal L71 emitted by the incident lens array 272 will be reflected by the movable reflection device 273 and form an optical signal L72, which is emitted along the right direction and will not be received by the output lens array 274. At this time, the second protection reflection device 254 is located at the third position and does not block the optical path between the protection lens array 252 and the first protection reflection device 253. The optical signal L61 emitted by the protection lens array 252 is reflected by the second protection reflection device 254 to form an optical signal L62. The optical signal L62 is reflected after entering the movable reflection device 273, forms an optical signal L63 and enters the output lens array 274, and finally is emitted from the output fiber array 275.

[0058] In this way, once an abnormal situation occurs in the optical signal of any optical path channel, the movable reflection device of this group of optical path channels can be moved to the second position, and the second protection reflection device can be driven to a suitable position according to the actual situation, so that the abnormal optical signal will not be emitted from the exit lens array of this group of optical path channels, and the optical signal emitted from the protection lens array will be reflected and incident on the exit lens array of this group of optical path channels to replace the abnormal optical signal.

[0059] In this embodiment, the drivers of each movable reflection device and the second protection reflection device are the same as those in the first embodiment, and both include a relay and a cantilever, which will not be elaborated here.

[0060] In order to reduce the volume of the optical switch, it is necessary to reasonably arrange multiple movable reflection devices, the first protection reflection device 253, the second protection reflection device 254, and multiple drivers. For this reason, as Figure 8 shown, in this embodiment, nine relays, eight movable reflection devices, the first protection reflection device 253, and the second protection reflection device 254 are closely arranged. Specifically, eight movable reflection devices 213, 223, 263, the first protection reflection device 253, and the second protection reflection device 254 are arranged in the middle, and nine relays are respectively arranged on the upper and lower sides of the movable reflection devices, the first protection reflection device 253, and the second protection reflection device 254. As Figure 8 shown, five relays are arranged on the upper side, including relays 281, 283, 285, etc., and four relays are also arranged on the lower side, including relays 282, 284, etc. Moreover, each relay is connected to the corresponding movable reflection device through a cantilever. For example, relay 281 is connected to movable reflection device 213 through cantilever 291, relay 282 is connected to movable reflection device 223 through cantilever 292, relay 2833 is connected to movable reflection device 263 through cantilever 293, relay 285 is connected to the second protection reflection device 254 through cantilever 295, and so on. And, the adjacent two relays on the same side are closely arranged, that is, the gap between the adjacent two relays on the same side is minimized as much as possible. This arrangement can minimize the difference in the working distances of the lens arrays of different ports, so as to ensure that the coupling efficiency of the optical signal to different output ports is almost the same.

[0061] Compared with the first embodiment, in this embodiment, the first protection reflection device 253 and the second reflection device 254 are arranged in the middle of multiple movable reflection devices, so that the optical path difference of the optical signals reflected from the first protection reflection device 253 and the second reflection device 254 reaching the movable reflection devices at both ends is reduced, which can further reduce the difference in the optical paths of the protection optical signals to different input ports, thereby achieving lower loss and more consistent coupling efficiency.

[0062] Since a movable reflection device of the compact protection optical switch with multi-channel parallel protection of the present utility model can reflect multiple optical signals emitted by an incident lens array, there is no need to separately provide a corresponding movable reflection device for each incident lens, and by arranging multiple relays in a compact manner, the optical switch has the advantages of low cost, small size, low loss, etc.

[0063] Finally, it should be emphasized that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A compact optical switch for realizing multi-channel parallel protection, comprising: An incident fiber array, an incident lens array, an exit lens array, and an exit fiber array arranged in sequence along the optical path. A movable reflection device is also arranged between the incident lens array and the exit lens array. The movable reflection device is driven by a driver, and the driver drives the movable reflection device to move between a first position and a second position; It is characterized in that: The compact optical switch further includes a first protection reflection device, and the first protection reflection device is located on the light-emitting side of the protection lens array; When the movable reflection device is in the first position, the optical signal emitted from the incident lens array is incident on the exit lens array. When the movable reflection device is in the second position, the optical signal emitted from the incident lens array is reflected by the movable reflection device and is not incident on the exit lens array. The optical signal emitted from the protection lens array is reflected by the first protection reflection device and is incident on the movable reflection device, and after being reflected by the movable reflection device, it is incident on the exit lens array.

2. The compact optical switch for realizing multi-channel parallel protection according to claim 1, characterized in that: The number of the incident fiber arrays is equal to and corresponds one-to-one with the number of the incident lens arrays, and the number of the incident fiber arrays is more than one; The number of the exit lens arrays is equal to and corresponds one-to-one with the number of the exit fiber arrays, and the number of the exit fiber arrays is more than one.

3. The compact optical switch for realizing multi-channel parallel protection according to claim 2, characterized in that: The first protection reflection device is located on one side of the movable reflection device.

4. The compact optical switch for realizing multi-channel parallel protection according to claim 2, characterized in that: The number of the movable reflection devices is more than two, and the first protection reflection device is located in the middle of the arrangement direction of the plurality of movable reflection devices; The compact optical switch further includes a second protection reflection device. The second protection reflection device is located in the middle of the arrangement direction of the plurality of movable reflection devices, and the second protection reflection device is driven by a protection driver to move between a third position and a fourth position.

5. The compact optical switch for realizing multi-channel parallel protection according to claim 4, characterized in that: When the second protection reflection device is in the third position, it does not reflect the optical signal emitted from the protection lens array; When the second protection reflection device is in the fourth position, the optical signal emitted from the protection lens array is reflected by the second protection reflection device and is incident on the exit lens array after passing through a movable reflection device located in the second position.

6. The compact optical switch for realizing multi-channel parallel protection according to claim 5, characterized in that: Along the light-emitting direction of the protection lens array, the second protection reflection device is located on the upstream side of the first protection reflection device.

7. The compact optical switch for realizing multi-channel parallel protection according to claim 6, characterized in that: The reflecting surface of the first protective reflecting device faces the first side in the arrangement direction of the plurality of movable reflecting devices, and the reflecting surface of the second protective reflecting device faces the second side in the arrangement direction of the plurality of movable reflecting devices.

8. The compact optical switch for realizing multi-path parallel protection according to any one of claims 1 to 7, characterized in that: The driver includes a relay and a cantilever. The relay drives the first end of the cantilever, and the movable reflecting device is fixed to the second end of the cantilever.

9. The compact optical switch for realizing multi-path parallel protection according to claim 8, characterized in that: The plurality of movable reflecting devices are arranged in a one-dimensional direction, and the relays of the plurality of drivers are alternately arranged on both sides of the movable reflecting devices.

10. The compact optical switch for realizing multi-path parallel protection according to claim 9, characterized in that: The plurality of relays on the same side are closely arranged.

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