CN111290084A - Multicast switching optical switch - Google Patents
Multicast switching optical switch Download PDFInfo
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- CN111290084A CN111290084A CN202010244991.3A CN202010244991A CN111290084A CN 111290084 A CN111290084 A CN 111290084A CN 202010244991 A CN202010244991 A CN 202010244991A CN 111290084 A CN111290084 A CN 111290084A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/35—Optical coupling means having switching means
- G02B6/351—Optical coupling means having switching means involving stationary waveguides with moving interposed optical elements
- G02B6/3512—Optical coupling means having switching means involving stationary waveguides with moving interposed optical elements the optical element being reflective, e.g. mirror
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/35—Optical coupling means having switching means
- G02B6/354—Switching arrangements, i.e. number of input/output ports and interconnection types
Abstract
The application provides a multicast switching optical switch, which comprises a first port, an optical splitting device, a control switch, a second port and a reflecting device. The M first ports are distributed along the X-axis direction, wherein M is a positive integer larger than 1. The light splitting device comprises M light splitting units. The optical splitting unit is used for splitting the optical signal of each first port into N sub-optical signals, wherein N is a positive integer greater than 1. The control switch comprises N reflection switches distributed along the Y-axis direction. The Y axis is perpendicular to the X axis. The N second ports are distributed along the Y-axis direction. The reflecting device reflects the M × N sub-optical signals from the optical splitting device to the N reflecting switches. Each reflection switch can rotate along the Y axis to reflect one of the M sub-optical signals to the reflection device, so that the sub-optical signals are reflected to one of the N second ports.
Description
Technical Field
The present application relates to the field of optical switch technology, and in particular, to a multicast switching optical switch.
Background
In the prior art, a Multicast Switch (MCS) includes M input ports, M optical splitters, N control switches, and N output ports, where the M input ports, the M optical splitters, the N control switches, and the N output ports are discrete devices, and the devices are fused by optical fibers, so that the Multicast Switch is large in size.
Disclosure of Invention
In view of the above, embodiments of the present application are expected to provide a multicast switching optical switch having the characteristics of high integration and small volume. In order to achieve the above beneficial effects, the technical solution of the embodiment of the present application is implemented as follows:
the embodiment of the present application provides a multicast switching optical switch, including:
the M first ports are distributed along the X-axis direction, wherein M is a positive integer larger than 1;
the optical splitting device comprises M optical splitting units, wherein the optical splitting units are used for splitting the optical signal of each first port into N sub-optical signals, and N is a positive integer greater than 1;
the control switch comprises N reflection switches distributed along the Y-axis direction, and the Y-axis is vertical to the X-axis;
n second ports are distributed along the Y-axis direction; and
a reflection device, said reflection device reflecting M × N sub optical signals from said optical splitter onto N said reflection switches, each said reflection switch being capable of receiving M said sub optical signals distributed along the X axis direction, each said reflection switch being capable of rotating along the Y axis to reflect one of M said sub optical signals onto said reflection device, so that said sub optical signal is reflected to one of N said second ports.
Further, the reflection device can converge the M sub-optical signals distributed along the X-axis direction onto the reflection switch.
Further, the N reflection switches are located on an object side focal plane of the reflection device.
Further, the reflecting device is a cylindrical mirror.
Further, the multicast switching optical switch includes:
and the collimating lens array comprises M x N collimating lens units, and the collimating lens units are used for collimating the sub optical signals and guiding the collimated sub optical signals to the reflecting device.
Further, the working distance of the collimating lens unit is W1, and the optical path length of the sub-optical signal from the light emitting surface of the collimating lens unit to the light incident surface of the reflective switch is S1, where W1 is 2 × S1.
Further, the light splitting device is located on an object side focal plane of the collimating lens array.
Further, the multicast switching optical switch includes:
and the focusing lens array comprises N focusing lens units distributed along the Y-axis direction, and the focusing lens units are used for focusing the M sub optical signals distributed along the X-axis direction from the reflecting device and guiding the focused sub optical signals to one of the N second ports.
Further, the working distance of the focusing lens unit is W2, and the optical path length of the sub-optical signal from the light emitting surface of the reflection switch to the light incident surface of the focusing lens unit is S2, where W2 is 2 × S2.
Further, the N second ports are located on an object side focal plane of the focusing lens array.
The multicast switching optical switch provided by the embodiment of the application utilizes the first port, the light splitting device, the control switch, the second port and the reflecting device to form a reflecting type space light path, so that the multicast switching optical switch has a smaller size. In addition, compare in the discrete device that prior art adopted and encapsulate alone, the device adopts the optical fiber butt fusion, the multicast optical switch that this application embodiment provided not only can reduce the encapsulation cost owing to adopt the spatial light path coupling of reflective and the mode of integrated encapsulation, can also avoid the loss that the optical fiber butt fusion brought, and optical index is more excellent. Because every reflecting switch only needs to rotate along the Y axle, that is to say, every reflecting switch is the one-dimensional rotating mirror, and control switch adopts the one-dimensional chip, compares and carries out two-dimentional rotating mirror control with the two-dimensional chip among the prior art, has reduced control switch's the chip design degree of difficulty, in addition, because this application embodiment adopts array chip, can produce more chips on the same wafer, greatly reduced the manufacturing cost of chip.
Drawings
Fig. 1 is a schematic structural diagram of a multicast switching optical switch according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a light splitting unit according to an embodiment of the present application.
Description of the reference numerals
A multicast switching optical switch 100; a first port 10; a light splitting device 20; a light splitting unit 21; a control switch 30; a reflective switch 31; a second port 40; a reflection device 50; a collimator lens array 60; a collimator lens unit 61; a focusing lens array 70; a focus lens unit 71.
Detailed Description
It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application. In the description of the embodiments of the present application, "μm" refers to an international unit of micrometers. The present application will now be described in further detail with reference to the accompanying drawings and specific examples.
Referring to fig. 1 and fig. 2, an embodiment of the present application provides a multicast switch optical switch 100, which includes a first port 10, an optical splitting device 20, a control switch 30, a second port 40, and a reflection device 50. The M first ports 10 are distributed along the X-axis direction, wherein M is a positive integer greater than 1. The spectroscopic apparatus 20 includes M spectroscopic units 21. The optical splitting unit 21 is configured to split the optical signal of each first port 10 into N sub-optical signals, where N is a positive integer greater than 1. The control switch 30 includes N reflective switches 31 distributed in the Y-axis direction. The Y axis is perpendicular to the X axis. The N second ports 40 are distributed in the Y-axis direction. The reflection device 50 reflects the M × N sub optical signals from the optical splitting device 20 onto the N reflection switches 31. Each reflective switch 31 is capable of receiving M sub-optical signals distributed along the X-axis direction. Each reflective switch 31 is capable of rotating along the Y-axis to reflect one of the M sub optical signals onto the reflective device 50, so that the sub optical signal is reflected to one of the N second ports 40.
M optical signals are input through the M first ports 10, and since each optical splitting unit 21 splits the optical signal of each first port 10 into N sub optical signals, the M optical splitting units 21 form M × N sub optical signal arrays and project the M × N sub optical signal arrays toward the reflection device 50. The reflection device 50 reflects the M × N sub optical signal arrays to the N reflection switches 31, each reflection switch 31 can receive M sub optical signals distributed along the X axis direction, so that the N reflection switches 31 receive the M × N sub optical signals, the reflection switches 31 are disposed corresponding to the second ports 40, each reflection switch 31 can independently rotate along the Y axis, so that the sub optical signals are displaced in the X axis direction, and the sub optical signals are projected to the corresponding reflection switches 31 through the variation of the displacement amount of the sub optical signals.
The reflective spatial light path is formed by the first port 10, the optical splitting device 20, the control switch 30, the second port 40 and the reflection device 50, so that the multicast switching optical switch 100 has a small size. In addition, compare in the discrete device that prior art adopted and encapsulate alone, the device adopts the optical fiber butt fusion, the multicast optical switch that this application embodiment provided not only can reduce the encapsulation cost owing to adopt the spatial light path coupling of reflective and the mode of integrated encapsulation, can also avoid the loss that the optical fiber butt fusion brought, and optical index is more excellent. Because every reflecting switch 31 only needs to rotate along the Y axle, that is to say, every reflecting switch 31 is the one-dimensional rotating mirror, and control switch 30 adopts the one-dimensional chip, compares and carries out two-dimensional rotating mirror control with the two-dimensional chip among the prior art, has reduced control switch 30's the chip design degree of difficulty, in addition, because this application embodiment adopts array chip, can produce more chips on the same wafer, greatly reduced the manufacturing cost of chip.
In the embodiment of the present application, a direction in which the optical signal is incident from the first port 10 is defined as a Z axis, a distribution direction of the M first ports 10 is defined as an X axis, and a distribution direction of the N second ports 40 is defined as a Y axis, where the X axis, the Y axis, and the Z axis form a coordinate system perpendicular to each other, such as an orientation or a position relationship shown in fig. 1.
It can be understood that the multicast switch optical switch provided in the embodiment of the present application may not only forward download optical signals from the M first ports 10 to the N second ports 40, but also upload optical signals from the N second ports 40 to the M first ports 10.
In some embodiments, the M first ports 10 are a 1 × M fiber array and the N second ports 40 are a 1 × N fiber array. That is, the M first ports 10 constitute a one-dimensional optical fiber array, and the N second ports 40 also constitute a one-dimensional optical fiber array. Further, the optical fiber may be a cladding-etched optical fiber.
Further, the M first ports 10 are formed by M etched fibers to form a 1 × M fiber array. Specifically, M corrosion optical fibers are fixed on the first silicon base in the X-axis direction according to a first set interval. The N second ports 40 are formed as a 1 x N fiber array from N etched fibers. Specifically, the N corrosion optical fibers are fixed on the second silicon base according to a second set interval in the Y-axis direction.
In one embodiment, referring to FIG. 1, the distance between two adjacent first ports 10 is L1, wherein L1 is 30 μm 125 μm. Illustratively, the distance L1 between two adjacent first ports 10 may be 30 μm, 35 μm, 40 μm, 60 μm, 80 μm, 100 μm, 110 μm, 115 μm, 120 μm, 125 μm, or the like. The distance between two adjacent second ports 40 is L2, wherein 30 μm L2 μm 125 μm, and the distance L2 between two adjacent second ports 40 can be 30 μm, 35 μm, 40 μm, 60 μm, 80 μm, 100 μm, 110 μm, 115 μm, 120 μm, 125 μm, etc. That is, the first port 10 and the second port 40 are both narrowly spaced. Therefore, the requirement on the rotation angle of the chip of the control switch 30 can be further lowered, the process difficulty of the chip of the control switch 30 can be further reduced, the size of the chip of the control switch 30 can be further reduced, and the cost is lower.
Illustratively, the M first ports 10 are formed as a 1 × M fiber array from M etched fibers. Specifically, M etched fibers are fixed on the first silicon base at intervals of L1 in the X-axis direction. The N second ports 40 are formed as a 1 x N fiber array from N etched fibers. Specifically, the N etched fibers are fixed on the second silica base at intervals of L2 in the Y-axis direction.
In some embodiments, referring to fig. 1, the N reflective switches are a 1 × N mems reflective switch array. MEMS reflective switch arrays, i.e., Micro-Electro-Mechanical System reflective switch arrays.
In some embodiments, referring to fig. 1, M first ports 10 are coupled to M optical splitting units 21. For example, M first ports 10 and M spectroscopic units 21 are bonded, respectively.
In one embodiment, the light splitting unit 21 is a planar optical waveguide splitter. The first port 10 is an optical fiber. The first port 10 is bonded to the light splitting unit. The Planar Lightwave circuit Splitter (PLC Splitter, Planar Lightwave circuit Splitter) has an even distribution effect on optical signals, that is to say, after optical signals enter the Planar Lightwave circuit Splitter, through the Y-branch structure of the Planar Lightwave circuit Splitter, optical power of optical signals can be equally distributed. In addition, the planar optical waveguide splitter also has good directivity.
In one embodiment, referring to fig. 1, the reflection device 50 can converge M sub-optical signals distributed along the X-axis direction onto the reflection switch 31. That is, the reflection device 50 can make the sub-optical signals generate displacement along the X-axis direction and not generate displacement along the Y-axis direction, so that M sub-optical signals distributed along the X-axis direction converge and not converge along the Y-axis direction, so that M × N sub-optical signals form N converging beams and are projected to N reflection switches 31, and the M sub-optical signals distributed along the X-axis direction are conveniently focused and projected to the reflection switches 31.
In one embodiment, referring to fig. 1, the N reflective switches 31 are located on an object focal plane of the reflective device 50. Since the M sub optical signals reflected by the reflective switch 31 have a certain divergence angle in the X direction, the sub optical signals reflected from the reflective device 50 to the second port 40 are parallel beams by the backward convergence of the reflective device 50.
In one embodiment, referring to fig. 1, the reflection device 50 is a cylindrical mirror.
In one embodiment, referring to fig. 1, the multicast switch optical switch 100 includes a collimating lens array 60. The collimator lens array 60 includes M × N collimator lens cells 61. The collimating lens unit 61 is used for collimating the sub optical signals and guiding the collimated sub optical signals to the reflecting device 50. Since the M sub optical signals in the Y-axis direction may have a certain divergence angle, the M sub optical signals in the X-axis direction are collimated into parallel beams by the collimator lens unit 61.
In an embodiment, referring to fig. 1, the working distance of the collimating lens unit 61 is W1, and the optical path length of the sub-optical signal from the light emitting surface of the collimating lens unit 61 to the light incident surface of the reflective switch 31 is S1, where W1 is 2 × S1. That is, the working distance W1 of the collimator lens unit 61 is twice the optical path length S1 of the sub-optical signal from the light exit surface of the collimator lens unit 61 to the light entrance surface of the reflection switch 31. When the sub-optical signal is a gaussian beam, the working distance W1 of the collimator lens unit 61 is: the beam waist position of the sub optical signal converted by the collimator lens unit 61 is 2 times the distance between the collimator lens unit 61. In this way, while maintaining a small size, propagation of the sub optical signal between the collimator lens unit 61 and the reflection switch 31 is ensured.
In one embodiment, referring to fig. 1, the light splitting device 50 is located on an object-side focal plane of the collimating lens array 60. In this way, it is convenient to collimate the sub optical signals emitted from the optical splitting device 50 into parallel beams.
In one embodiment, referring to fig. 1, the multicast switch optical switch 100 includes a focusing lens array 70. The focus lens array 70 includes N focus lens units 71 distributed in the Y-axis direction. The focusing lens unit 71 is used for focusing the M sub-optical signals distributed along the X-axis direction from the reflection device 50, and guiding the focused sub-optical signals to one of the N second ports 40. The N focusing lens units 71 are one-dimensional lens arrays, and focus the sub optical signals from the reflection device 50 to the N second ports 40.
In an embodiment, referring to fig. 1, the working distance of the focusing lens unit 71 is W2, and the optical path length of the sub-optical signal from the light emitting surface of the reflective switch 31 to the light incident surface of the focusing lens unit 71 is S2, where W2 is 2 × S2. That is, the working distance W2 of the focus lens unit 71 is twice the optical path length S2 of the sub-optical signal from the light exit surface of the reflection switch 31 to the light entrance surface of the focus lens unit 71. When the sub-optical signal is a gaussian beam, the working distance W2 of the focusing lens unit 71 is: the beam waist position of the sub optical signal converted by the focus lens 71 is 2 times the distance between the focus lens unit 71. In this manner, while maintaining a small size, propagation of the sub optical signal between the focus lens unit 71 and the reflection switch 31 is ensured.
In one embodiment, referring to fig. 1, the N second ports 40 are located on the object-side focal plane of the focusing lens array 70. In this manner, it is convenient to receive the converging light beam from the focus lens unit 71.
In one embodiment, referring to fig. 1, the distance between any two adjacent focusing lens units 71 is equal. That is, the focus lens units 71 are equally spaced.
In some embodiments, the spacing between any two adjacent first ports 10 is equal.
In a specific embodiment, the distance between any two adjacent first ports 10 is equal, the light splitting unit 21 is disposed corresponding to the first ports 10, and the distance between the input ends of any adjacent light splitting unit 21 is equal.
In one embodiment, referring to fig. 1 and 2, M spectroscopic units 21 are stacked in the X-axis direction by a bonding process. That is, the light splitting unit 21 has a single-layer structure, and the light splitting unit 21 splits an input optical signal into N sub optical signals, so that M light splitting units 21 are arranged in an overlapping manner in the X-axis direction to form the light splitting devices 20 with a narrow pitch.
Specifically, the light splitting unit 21 is a single-layer planar optical waveguide splitter.
Illustratively, to facilitate a clearer representation of the embodiments of the present application, fig. 1 shows three sub-optical signals, which are respectively labeled as 101, 102 and 103 as shown in fig. 1, 101, 102 and 103 split by the splitting device 20 are distributed along the X-axis direction, after being collimated by the collimating lens unit 60, 101, 102 and 103 are parallel beams distributed along the X-axis direction, the collimated beams 101, 102 and 103 are projected to the reflecting device 50, the reflecting device 50 converges 101, 102 and 103 into a converging beam in the X-axis direction, and reflects to the reflective switch 31, the reflective switch 31 receives the converged 101, 102 and 103, the reflective switch 31 rotates along the Y axis to change the displacement of the 101, 102 and 103 in the X axis direction, reflects the changed 101, 102 and 103 to the reflective device 50, and reflects and focuses through the reflective device 50 and the focusing lens unit 71, and one of the N second ports 40 can be respectively selected to be output by the 101, 102 and 103.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A multicast switched optical switch, comprising:
the M first ports are distributed along the X-axis direction, wherein M is a positive integer larger than 1;
the optical splitting device comprises M optical splitting units, wherein the optical splitting units are used for splitting the optical signal of each first port into N sub-optical signals, and N is a positive integer greater than 1;
the control switch comprises N reflection switches distributed along the Y-axis direction, and the Y-axis is vertical to the X-axis;
n second ports are distributed along the Y-axis direction; and
a reflection device, said reflection device reflecting M × N sub optical signals from said optical splitter onto N said reflection switches, each said reflection switch being capable of receiving M said sub optical signals distributed along the X axis direction, each said reflection switch being capable of rotating along the Y axis to reflect one of M said sub optical signals onto said reflection device, so that said sub optical signal is reflected to one of N said second ports.
2. The multicast switched optical switch according to claim 1, wherein said reflection means is capable of converging M of said sub-optical signals distributed along the X-axis onto said reflection switch.
3. The multicast switch fabric of claim 2 wherein N of said reflective switches are located in an object-side focal plane of said reflective device.
4. The multicast switch fabric of claim 3, wherein the reflecting means is a cylindrical mirror.
5. The multicast switched optical switch according to any of claims 1 to 4, wherein the multicast switched optical switch comprises:
and the collimating lens array comprises M x N collimating lens units, and the collimating lens units are used for collimating the sub optical signals and guiding the collimated sub optical signals to the reflecting device.
6. The multicast switch optical switch according to claim 5, wherein the collimating lens unit has a working distance of W1, and the optical path length of the sub-optical signal from the light emitting surface of the collimating lens unit to the light incident surface of the reflective switch is S1, wherein W1 is 2 × S1.
7. The multicast switched optical switch of claim 6, wherein the optical splitting device is located at an object-side focal plane of the collimating lens array.
8. The multicast switched optical switch according to any of claims 1 to 4, wherein the multicast switched optical switch comprises:
and the focusing lens array comprises N focusing lens units distributed along the Y-axis direction, and the focusing lens units are used for focusing the M sub optical signals distributed along the X-axis direction from the reflecting device and guiding the focused sub optical signals to one of the N second ports.
9. The multicast switch optical switch according to claim 8, wherein the working distance of the focusing lens unit is W2, and the optical path length of the sub-optical signal from the light emitting surface of the reflective switch to the light incident surface of the focusing lens unit is S2, where W2 is 2 × S2.
10. The multicast switched optical switch of claim 9, wherein N of the second ports are located in an object-side focal plane of the focusing lens array.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010244991.3A CN111290084A (en) | 2020-03-31 | 2020-03-31 | Multicast switching optical switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010244991.3A CN111290084A (en) | 2020-03-31 | 2020-03-31 | Multicast switching optical switch |
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| CN111290084A true CN111290084A (en) | 2020-06-16 |
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| CN202010244991.3A Pending CN111290084A (en) | 2020-03-31 | 2020-03-31 | Multicast switching optical switch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021258666A1 (en) * | 2020-06-22 | 2021-12-30 | 武汉光迅科技股份有限公司 | Multicast switching optical switch |
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