AU2020100778A4 - A multi-core optical fiber switch based on an MEMS reflector - Google Patents

A multi-core optical fiber switch based on an MEMS reflector Download PDF

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AU2020100778A4
AU2020100778A4 AU2020100778A AU2020100778A AU2020100778A4 AU 2020100778 A4 AU2020100778 A4 AU 2020100778A4 AU 2020100778 A AU2020100778 A AU 2020100778A AU 2020100778 A AU2020100778 A AU 2020100778A AU 2020100778 A4 AU2020100778 A4 AU 2020100778A4
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optical fiber
core optical
core
mems reflector
array
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Qi XIA
Libo Yuan
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Guilin University of Electronic Technology
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Guilin University of Electronic Technology
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/29—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
    • G02F1/31—Digital deflection, i.e. optical switching
    • G02F1/313—Digital deflection, i.e. optical switching in an optical waveguide structure
    • G02F1/3131—Digital deflection, i.e. optical switching in an optical waveguide structure in optical fibres
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
    • 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
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/02042—Multicore optical fibres
    • 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
    • G02B6/04—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/35—Optical coupling means having switching means
    • G02B6/351—Optical coupling means having switching means involving stationary waveguides with moving interposed optical elements
    • G02B6/3512—Optical coupling means having switching means involving stationary waveguides with moving interposed optical elements the optical element being reflective, e.g. mirror
    • G02B6/3518—Optical coupling means having switching means involving stationary waveguides with moving interposed optical elements the optical element being reflective, e.g. mirror the reflective optical element being an intrinsic part of a MEMS device, i.e. fabricated together with the MEMS device
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/29—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
    • G02F1/31—Digital deflection, i.e. optical switching
    • G02F1/313—Digital deflection, i.e. optical switching in an optical waveguide structure
    • G02F1/3137—Digital deflection, i.e. optical switching in an optical waveguide structure with intersecting or branching waveguides, e.g. X-switches and Y-junctions

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)

Abstract

The invention provides a multi-core optical fiber switch based on an MEMS reflector. The multi core optical fiber switch is composed of a MEMS reflectors base, a base housing, an MEMS reflector, a collimating microlens array, a deflection optical window housing, an input-output fibers array, and a multi-core optical fiber switch device control driving board. The MEMS reflector can be rotated along two perpendicular spindles within certain angles. The light incident through the input-output fibers array is collimated by the collimating microlens array, after deflected by the MEMS reflector, it is coupled by the collimating microlens array to the output fiber in the input-output fibers array. The invention can act as a multi-core optical fiber switch or a multi-core optical fiber gate, and can be widely used in the fields of multi-core optical fiber sensing, optical communication field and etc. I | | cL) - - ----------------- 0 | | | 0 0 Cl

Description

DESCRIPTION
TITLE OF INVENTION
A multi-core optical fiber switch based on an MEMS reflector
TECHNICAL FIELD
[0001] The invention relates to a multi-core optical fiber switch based on an MEMS reflector, which can be used for automatic protection reversal, component detection, network monitoring, multi-core selector switch, etc., and belongs to the field of optical communication, passive optical device, multi-core optical fiber device and fiber sensing technology.
BACKGROUND ART
[0002] The development of productivity and the improvement of people's standard of living have put forward higher requirements for high-capacity, high-speed optical communication networks, and furthermore, have pushed the development of optical devices in the field of optical communication towards faster, smaller and more integrated direction. Multi-core optical fibers have become a hotspot for optical communications development due to the integration of more cores in one fiber, increasing the dimension of spatial multiplexing, which can significantly increase the capacity of communication systems.
[0003] At the same time, the development of optical, mechanical and electrical integration
2020100778 19 May 2020 technology is now driving the rapid development of optical communications, using MEMS (Micro Electro-Mechanical System) technology can achieve the miniaturization of a single device or a high degree of integration of multiple devices, this can meet the development needs of optical communications and sensing field, so MEMS reflectors have become the leading edge technology in the optical communications industry. At present, the Chinese domestic communication, sensing, monitoring and other fields are still using a large number of traditional mechanical optical switches, but with the integration of optical technology and miniaturization development, the use of MEMS reflector switch will play a great role. Multi-core optical fiber switch is a key device in the wide development and application of multi-core optical fiber, its small structure size, low insertion loss, low crosstalk, and long-term stability are the important performance indicators
[0004] Patent No. CN105474059A proposes an optical switch for controlled reflection of light from one input fiber to a specific target output fiber in a plurality of fiber arrays using a MEMS reflector. This optical switch enables light pass switching of standard single-mode optical fibers, but cannot be used for optical fiber switching of multi-core optical fibers, nor for the gating of different cores of multi-core optical fibers.
[0005] Patent No. CN 106019490A designs a 1*N channel optical switching module that disposes of both a fiber array and a multi-core collimator of array lens in a tube cap. But the disadvantage of the device is also that it cannot be used for the optical fiber switching of multi-core optical fibers, nor can it be used for the gating of different cores of multi-core optical fibers.
[0006] With the development of multi-core optical fiber, people are using multi-core optical fiber more and more. In the actual use of multi-core optical fiber, there is usually problems where to use a particular fiber core of the multi-core optical fiber or the gating of the multi-core optical fiber core; also, with the improvement of sensing technology, usually sensing or information acquiring are conducted on different cores of one multi-core optical fiber, and then the
2020100778 19 May 2020 information of each fiber core is analyzed separately to avoid the interference of different information, and then the collected information is analyzed and processed in a unified manner, hence there is a huge practical demand for multi-core optical fiber switch.
SUMMARY OF INVENTION
[0007] It is the objective of the invention to provide a multi-core optical fiber switch based on an MEMS reflector.
[0008] The objective of the invention is achieved as follows:
[0009] A multi-core optical fiber switch based on an MEMS reflector as shown in FIG. 1. The multi-core optical fiber switch based on an MEMS reflector is composed of a MEMS reflectors base 1, an MEMS reflector 2, a base housing 3, a deflection optical window housing 4, a collimating microlens array 5, an input-output fibers array 6, and a multi-core optical fiber switch device control driving board.
[0010] The MEMS reflector can be rotated along two perpendicular spindles within certain angles, and align to the center of the collimating microlens which corresponds to the fiber core of the standard single-mode optical fiber.
[0011] The multi-core optical fiber switch control driving board is composed of a controller interface and a MEMS driving board, and connected with pins drawn from the MEMS reflector base 1.
2020100778 19 May 2020
[0012] The collimating microlens array 5 is composed of a collimating microlens array substrate 5-2 (the middle spacer of the substrate is not shown); each core of each multi-core optical fiber or the core of the standard single-mode optical fiber is directly opposite to a collimating microlens 5-1. The collimating microlens directly opposite to the multi-core optical fiber core, which has an optical paths diagonal to the MEMS reflector 2; the collimating microlens array 5 is installed in the deflection optical window housing 4 and its close to the input-output fibers array 6; the collimating microlens array 5 collimates the light emitted from the fiber end to parallel light and inject into the MEMS reflector 2, and couples the parallel light reflected from the MEMS reflector 2 into the optical fiber core.
[0013] The input-output fibers array consists of a standard single-mode optical fiber which is in the center of the array, an M number of N-core optical fiber surrounding the standard singlemode optical fiber (M and N are integers greater than 1) and a hard sleeve, the N-core optical fiber and standard single-mode optical fiber are fixed in the hard sleeve. When the core distance of the multi-core optical fibers is fixed, with the maximum deflection angle of the MEMS reflector 2 being larger, the maximum number M of the multi-core optical fibers is larger. When the maximum deflection angle of the MEMS reflector 2 is fixed, with the core distance being smaller, the maximum number M of the multi-core optical fibers is larger.
[0014] The optical fiber arrangement of the input-output fibers array may be a triangular arrangement, a rectangular arrangement, or a circular arrangement; the hard sleeve section may be a circular cross-section, a triangular cross-section, or a rectangular cross-section
[0015] The multi-core optical fiber maybe a dual-core optical fiber, a triple-core optical fiber, or other few-core optical fibers, or a multi-core optical fiber with a higher density and a larger number of cores, such as a 38-core optical fiber
2020100778 19 May 2020
[0016] The a multi-core optical fiber switch based on an MEMS reflector, when it is acting as a switch for multi-core optical fibers, the optical signal from the standard single-mode optical fiber is input into the multi-core optical fiber switch, immediately after ejection from the standard single-mode optical fiber, it is collimated by the collimating microlens array 5 and passed through the deflection optical window 4-1, which is then reflected back to the deflection optical window 4-1 by the MEMS reflector 2 at a corresponding deflection angle, and then coupled by the collimating microlens array 5 into one fiber core of the corresponding multi-core optical fiber.
[0017] The a multi-core optical fiber switch based on an MEMS reflector, when it is acting as a gate for multi-core optical fibers, the optical signal from a core of one multi-core optical fiber in the input-output libers array 6 is input into the multi-core optical fiber switch, immediately after ejection from the multi-core optical fiber, it is collimated by the collimating microlens array 5 diagonal to the MEMS reflector 2 and passed through the deflection optical window 4-1, which is then reflected back to the deflection optical window 4-1 by the MEMS reflector 2 at a corresponding deflection angle, and then coupled by the collimating microlens array 5 into the standard single-mode optical fiber.
[0018] The beneficial effects of the invention are:
[0019] 1. The device is highly integrated, compact, has a small size and low number of components are required, the highly integrated devices can effectively increase the core density of multi-core optical fibers.
[0020] 2. Since the MEMS reflector used is under small influences from the temperature and humidity of the external environment and other influences, so it can effectively maintain the long-term consistency.
2020100778 19 May 2020
[0021] 3. Provides a switch that can be used for multi-core optical fibers, enables to achieve the gating choice of multi-core optical fibers. This enriches the range of multi-core optical fiber related devices, and in combination with other multi-core optical fiber devices can enrich the range of multi-core optical fiber applications. The multi-core optical fiber switch can also be used as a core gate for multi-core optical fiber, which can effectively facilitate the daily use of multi-core optical fiber.
BRIEF DESCRIPTION OF DRAWINGS
[0022] FIG. 1 is a schematic diagram of the structure of a seven-core optical fiber switch based on an MEMS reflector. The embodiment uses a standard single-mode optical fiber and an inputoutput fibers array 6 compromising eight seven-core optical fibers. Numbers in the diagram are: a MEMS reflectors base 1, an MEMS reflector 2, a base housing 3, a deflection optical window housing 4, a collimating microlens array 5, collimating microlens 5-1, a collimating microlens array substrate 5-2, an input-output fibers array 6, seven-core optical fiber 6-1 to 6-8, and a standard single-mode optical fiber 6-9.
[0023] FIG. 2 is a schematic diagram of the structure of an MEMS reflector 2 of a seven-core optical fiber switch based on an MEMS reflector.
[0024] FIG. 3 is a program flow-chart of a seven-core optical fiber switch based on an MEMS reflector.
[0025] FIG. 4 is a working optical path diagram of a seven-core optical fiber switch based on an MEMS reflector.
2020100778 19 May 2020
[0026] FIG. 5 shows a package diagram of a seven-core optical fiber switch based on an MEMS reflector.
[0027] FIG. 6 is a cross-sectional view of an input-output fibers array 6 of a dual-core optical fiber switch based on an MEMS reflector.
[0028] FIG. 7 is a cross-sectional view of an input-output fibers array 6 of a three-core optical fiber switch based on an MEMS reflector.
[0029] FIG. 8 is a cross-sectional view of an input-output fibers array 6 of a four-core optical fiber switch based on an MEMS reflector. Wherein the four-core optical fiber in FIG. 8(a) is a center-symmetric four-core optical fiber; the four-core optical fiber in FIG. 8(b) is a four-core optical fiber with a rectangular distribution of fiber cores.
[0030] FIG. 9 is a cross-sectional view of an input-output fibers array 6 of a five-core optical fiber switch based on an MEMS reflector.
[0031] FIG. 10 shows the cross-sectional views of an input-output fibers array 6 of seven-core optical fiber switches based on an MEMS reflector; FIG. 10(a) is a seven-core optical fiber switch using a hard sleeve with circular cross-section and the fibers in the input-output fibers array 6 are rectangularly arranged; FIG. 10(b) is a seven-core optical fiber switch using a hard sleeve with circular cross-section and the fibers in the input-output fibers array 6 are trianglemade-hexagonal arranged. FIG. 10(c) is a seven-core optical fiber switch using a hard sleeve with a rectangular cross-section and the fibers in the input-output fibers array 6 are rectangularly arranged; FIG. 10(d) is a seven-core optical fiber switch using a hard sleeve with a rectangular cross-section and the fibers in the input-output fibers array 6 are triangle-made-hexagonal
2020100778 19 May 2020 arranged.
[0032] FIG. 11 is a cross-sectional view of an input-output fibers array 6 of a 19-core optical fiber switch based on an MEMS reflector.
DESCRIPTION OF EMBODIMENTS
[0033] The working principle of the invention will be described below in conjunction with the drawings and specific embodiments, and the invention will be further described as below:
[0034] Embodiment 1: A seven-core optical fiber switch based on an MEMS reflector.
[0035] A schematic diagram of the structure of a seven-core optical fiber switch based on an MEMS reflector is shown in FIG. 1, including a MEMS reflector base 1, an MEMS reflector 2, a base housing 3, a deflection optical window housing 4, a collimating microlens array 5, an inputoutput fiber array 6, and a multi-core optical fiber switch device control driving board (not shown). Wherein the input-output fiber array 6 compromises one standard single-mode optical fiber and eight seven-core optical fiber.
[0036] The technology for manufacturing MEMS reflectors 2 is well known, and it is preferable to choose the MEMS reflector 2 with a higher performance, it has characteristics of small size, fast speed, quick stabilization, large reflection area and large deflection angle. The MEMS reflector 2 in the invention has special features, and adopting these features makes the embodiments of the invention have better superior performance. In this embodiment, the device adopts a special MEMS reflector 2 as shown in the structure diagram in FIG.2, to be the multi2020100778 19 May 2020 core optical fiber switch. In order to integrate more multi-core optical fibers, the MEMS reflector 2 has a rather large reflection area, and covers all fiber cross-sections of the input-output fibers array 6. To achieve a good result, and keep the symmetrical deflection angle, the MEMS reflector 2 is kept parallel to the base, and the deflection center of the MEMS reflector 2 is directly opposite to the center of the standard single-mode optical fiber.
[0037] In this embodiment, a collimating microlens array 5 as shown in FIG. 1 is provided. The collimating microlens array 5 can be accurately manufactured using techniques such as flat plate etching, and has the characteristics of small diameter and short focal length. These collimating microlens 5-1 is on a collimating microlens array substrate 5-2 (the middle spacer substrate is not shown). The substrate may be quartz, which is convenient for manufacturing and installation. When the collimating microlens substrate 5-2 is installed, the substrate is limited to be only installed in the deflection optical window, and at the same time, the collimating microlens array 5 on the substrate is precisely defined in an accurate position.
[0038] Regarding the collimating microlens array 5, the invention has special characteristics, which are used to produce the superior performance of the preferred embodiments of the invention. In this embodiment, the device uses the special collimating microlens array 5 distribution form shown in FIG. 1 as a multi-core optical fiber switch. To ensure that the light beam emitted from the standard sing-mode optical fiber can pass through a collimating microlens 5-1, and after being well collimated, it is directed to the MEMS reflector 2, and then the parallel light beam reflected from the MEMS reflector 2 can be coupled into one core of one multi-core optical fiber through the collimating microlens 5-1, and match different numbers of fiber cores and different numbers of multi-core optical fibers at the same time. Ensure that the beam emitted from any one of the multi-core optical fibers can pass through a collimating microlens 5-1, and after being well collimated, it is directed to the MEMS reflector 2, and then the parallel light beam reflected from the MEMS reflector 2 can be coupled into the standard single-mode optical fiber through the collimating microlens 5-1. Therefore, the collimating microlens array 5 must correspond to the distribution of the multi-core optical fibers and standard single-mode optical ίο
2020100778 19 May 2020 fiber used in the switch, and the fiber core distribution of the multi-core optical fibers, ensure that every fiber core is directly opposite to a collimating microlens 5-1 to achieve collimation and coupling of the standard single-mode optical fiber and the multi-core optical fibers.
[0039] The following is a detailed description of an embodiment with preferred parameter.
[0040] The schematic diagram of the cross-section structure of the input-output fibers array 6 is shown in FIG. 1, the standard single-mode optical fiber and seven-core optical fiber as shown in the figure are distributed in the shape of EB , in which the standard single-mode optical fiber is located in the center of the “ EH ”, its number is 6-9, the other eight seven-core optical fibers are distributed around the EB, numbers from the upper left are 6-1 to 6-8, fiber and both the horizontal and vertical spacing between fibers are 150 micrometers. The distribution of the cores of the selected seven-core optical fiber 7-1 is shown in FIG. 1, the numbers from the lower left are 6-4-1 to 6-4-7, the middle core is 6-4-4, the middle core 6-4-4 is located in the center of the seven-core optical fiber, the other six cores are distributed in the six vertices of the positive hexagon, the fiber diameter is 125 micrometers, the distance between the cores is 35 micrometers. On the cross-section of the input-output fibers array 6, middle core of the standard single-mode optical fiber 6-9 is selected as the coordinate origin, the direction seven-core optical fiber 6-5 is on is the positive direction of the X-axis, the direction which the seven-core optical fiber 6-2 is in is the positive direction of the Y-axis, and the plane right angle coordinate system is established. At this time, the horizontal and vertical center coordinates of the standard singlemode optical fiber core center and every core center of each cores of the seven seven-core optical fibers are as shown by the below table:
Unit: micrometer
TABLE 1
Standard Singlemode optical fiber Number 6-9
Horizontal Coordinates 0
Vertical Coordinates 0
2020100778 19 May 2020
Sevencore optical fiber 6-1 Number 6-1-1 6-1-2 6-1-3 6-1-4 6-1-5 6-1-6 6-1-7
Horizontal Coordinates 182.48 182.48 -150 -150 -150 117.52 117.52
Vertical Coordinates 131.25 168.75 112.5 150 187.5 131.25 168.75
Sevencore optical fiber 6-2 Number 6-2-1 6-2-2 6-2-3 6-2-4 6-2-5 6-2-6 6-2-7
Horizontal Coordinates -32.48 -32.48 0 0 0 32.48 32.48
Vertical Coordinates 131.25 168.75 112.5 150 187.5 131.25 168.75
Sevencore optical fiber 6-3 Number 6-3-1 6-3-2 6-3-3 6-3-4 6-3-5 6-3-6 6-3-7
Horizontal Coordinates 117.52 117.52 150 150 150 182.48 182.48
Vertical Coordinates 131.25 168.75 112.5 150 187.5 131.25 168.75
Sevencore optical fiber 6-4 Number 6-4-1 6-4-2 6-4-3 6-4-4 6-4-5 6-4-6 6-4-7
Horizontal Coordinates 182.48 182.48 -150 -150 -150 117.52 117.52
Vertical Coordinates -18.75 18.75 -37.5 0 37.5 -18.75 18.75
Sevencore optical fiber 6-5 Number 6-5-1 6-5-2 6-5-3 6-5-4 6-5-5 6-5-6 6-5-7
Horizontal Coordinates 117.52 117.52 150 150 150 182.48 182.48
Vertical Coordinates -18.75 18.75 -37.5 0 37.5 -18.75 18.75
Sevencore optical fiber 6-6 Number 6-6-1 6-6-2 6-6-3 6-6-4 6-6-5 6-6-6 6-6-7
Horizontal Coordinates 182.48 182.48 -150 -150 -150 117.52 117.52
Vertical Coordinates 168.75 131.25 187.5 -150 112.5 168.75 131.25
Sevencore optical fiber 6-7 Number 6-7-1 6-7-2 6-7-3 6-7-4 6-7-5 6-7-6 6-7-7
Horizontal Coordinates -32.48 -32.48 0 0 0 32.48 32.48
Vertical Coordinates 168.75 131.25 187.5 -150 112.5 168.75 131.25
Sevencore optical fiber 6-8 Number 6-8-1 6-8-2 6-8-3 6-8-4 6-8-5 6-8-6 6-8-7
Horizontal Coordinates 117.52 117.52 150 150 150 182.48 182.48
Vertical Coordinates 168.75 131.25 187.5 -150 112.5 168.75 131.25
[0041] The MEMS reflector 2 is shown in FIG. 2, and the MEMS reflector 2 has two mutually perpendicular rotation shafts. For ease of expression and later parameter presentation, place the
2020100778 19 May 2020 multi-core optical fiber switch horizontally positive. The axis of rotation in the horizontal direction is the b-axis. The upward rotation of the MEMS reflector 2 is defined as the positive direction of the b-axis, and the rotation angle of the b-axis is a positive number; the downward rotation of the MEMS reflector 2 is defined as the negative direction of the b-axis, and the rotation angle of the b-axis is a negative number. The axis of rotation in the vertical direction is the a-axis, turning the MEMS reflector 2 to the right is specified as the positive direction of the a-axis, and the rotation angle of the a-axis is a positive number; turning the MEMS reflector 2 to the left is specified as the negative direction of the a-axis, and the rotation angle of the a-axis is a negative number.
[0042] The basic workflow of a seven-core optical fiber switch based on an MEMS reflector is shown in FIG. 3, it is achieved specifically as follows: after starting the multi-core optical fiber switch, the channel signal to be switched can be chosen according to the user's needs, or according to the preset or user programmed procedure to read out the channel signals to be switched. Using the control interface of the controller to match the pre-calibrated-set deflection angle of the MEMS reflector 2, outputs corresponding control signal and transmits it to the MEMS driving board 7-2. The MEMS driving board 7-2 converts the control signal received to the corresponding driving voltage or current, then transmits it to the MEMS reflector 2 to control the deflection of the MEMS reflector 2 to the pre-set angle.
[0043] If the function of the device is as a multi-core optical fiber switch, when it is necessary to send an optical signal from the core of the standard single-mode optical fiber 6-9 to one core of a particular multi-core optical fiber, when sending an optical signal from the standard single-mode optical fiber 6-9 to the middle core 6-2-4 of the seven-core optical fiber 6-2, the basic principle of the optical path is the shown in FIG. 4 using the example of the mid-axis section of the multicore optical fiber switch, the light emitted from the standard single-mode optical fiber 6-9 is collimated to parallel light after passing through the collimating microlens 5-1, and then passes through the collimating microlens array substrate 5-2 and enters the space of the deflection optical window 4-1, arrives at the MEMS reflector 2 that has been deflected to a pre-set angle,
2020100778 19 May 2020 and then passes through the reflection of the MEMS reflector 2 and enters the space of the deflection optical window 4-1, then passes through the collimating microlens array substrate 5-2 and is coupled into the middle core 6-2-4 of the seven-core optical fiber 6-2 by the collimating microlens 5-1. And there’s the example where light signal of standard single-mode optical fiber 6-9 is sent to the upper core 6-2-5 of the seven-core optical fiber 6-2. The light emitted from the standard single-mode optical fiber 6-9 is collimated to parallel light after passing through the collimating micro lens 5-1, passes through the collimating microlens array substrate 5-2, enters the space of the deflection optical window 4-1, arrives at the MEMS reflector 2-4 that has been deflected to a larger angle than the pre-set angle used for the middle core 6-2-4, enters the space of the deflection optical window 4-1 through the reflection of the MEMS reflector 2. Then it passes the collimating microlens array substrate 5-2, and is coupled by the collimating microlens 5-1 into the upper core 6-2-5 of the seven-core optical fiber 6-2.
[0044] Based on the same principle, the optical paths of the light signal of the standard singlemode optical fiber 6-9 sent to different cores of other seven-core optical fibers is: standard single-mode optical fiber 6-9 to the collimating microlens 5-1, the collimating microlens array substrate 5-2, the deflection optical window 4-1, the MEMS reflector 2, the deflection optical window 4-1, the collimating microlens array substrate 5-2, the collimating microlens 5-1, any core of any seven-core optical fibers. To complete the optical paths from the standard singlemode optical fiber 6-9 to any cores of any seven-core optical fibers, when the lengths of the deflection optical window is 2500 micrometers, the theoretical deflection angles needed by each core and the MEMS reflector are as follows:
Unit: Degree
TABLE 2
MEMS REFLECTOR
NUMBER 6-1-1 6-1-2 6-1-3 6-1-4 6-1-5 6-1-6 6-1-7
2020100778 19 May 2020
a-axis deflection angle -2.08736 -2.08736 -1.71682 -1.71682 -1.71682 -1.34569 -1.34569
b-axis deflection angle 1.50264 1.93080 1.28829 1.71682 2.14458 1.50264 1.93080
NUMBER 6-2-1 6-2-2 6-2-3 6-2-4 6-2-5 6-2-6 6-2-7
a-axis deflection angle -0.37217 -0.37217 0 0 0 0.37217 0.37217
b-axis deflection angle 1.50264 1.93080 1.28829 1.71682 2.14458 1.50264 1.93080
NUMBER 6-3-1 6-3-2 6-3-3 6-3-4 6-3-5 6-3-6 6-3-7
a-axis deflection angle 1.34569 1.34569 1.71682 1.71682 1.71682 2.08737 2.08737
b-axis deflection angle 1.50264 1.93080 1.288286 1.716815 2.144577 1.50264 1.93080
NUMBER 6-4-1 6-4-2 6-4-3 6-4-4 6-4-5 6-4-6 6-4-7
a-axis deflection angle -2.08736 -2.08736 -1.71682 -1.71682 -1.71682 -1.34569 -1.34569
b-axis deflection angle -0.21486 0.21486 -0.42969 0 0.42969 -0.21486 0.21486
NUMBER 6-5-1 6-5-2 6-5-3 6-5-4 6-5-5 6-5-6 6-5-7
a-axis deflection angle 1.34569 1.34569 1.71682 1.71682 1.71682 2.08737 2.08737
b-axis deflection angle -0.21486 0.21486 -0.42969 0 0.42969 -0.21486 0.21486
NUMBER 6-6-1 6-6-2 6-6-3 6-6-4 6-6-5 6-6-6 6-6-7
a-axis deflection angle -2.08736 -2.08736 -1.71682 -1.71682 -1.71682 -1.34569 -1.34569
b-axis deflection angle -1.9308 -1.50263 -2.14458 -1.71682 -1.28829 -1.9308 -1.50263
2020100778 19 May 2020
NUMBER 6-7-1 6-7-2 6-7-3 6-7-4 6-7-5 6-7-6 6-7-7
a-axis deflection angle -0.37217 -0.37217 0 0 0 0.37217 0.37217
b-axis deflection angle -1.9308 -1.50263 -2.14458 -1.71682 -1.28829 -1.9308 -1.50263
NUMBER 6-8-1 6-8-2 6-8-3 6-8-4 6-8-5 6-8-6 6-8-7
a-axis deflection angle 1.34569 1.34569 1.71682 1.71682 1.71682 2.08737 2.08737
b-axis deflection angle -1.9308 -1.50263 -2.14458 -1.71682 -1.28829 -1.9308 -1.50263
[0045] If the function of the device is as a multi-core optical fiber core gate, then it extracts the optical signal of a core of a seven-core optical fiber to the standard single-mode optical fiber 6-9 in the middle, then the optical paths principle is different from FIG. 4. The optical path is to firstly be inclined directed to the MEMS reflector 2 then reflected to the standard single-mode optical fiber in the center. Because of the need to ensure optical power and reduce losses, there is a slight difference between the optical paths from a standard single-mode optical fiber to any core of a multi-core optical fiber and from that core of that multi-core optical fiber to the standard single-mode optical fiber. Using the upper and lower side cores of the seven-core optical fiber 6-2 as an example, the light emitted from the upper side core 6-2-5 of the sevencore optical fiber 6-2 is collimated to parallel light after passing through the collimating microlens 5-1, and then passes through the collimating microlens array substrate 5-2, diagonal to the MEMS reflector 2 and enters the space of the deflection optical window 4-1, arrives at the MEMS reflector 2 that has been deflected to a pre-set angle, and then passes through the reflection of the MEMS reflector 2 and enters the space of the deflection optical window 4-1, then passes through the collimating microlens array substrate 5-2 and is coupled into the standard single-mode optical fiber 6-9 by the collimating micro lens 5-1. The light emitted from the lower side core 6-2-3 of the seven-core optical fiber 6-2 is collimated to parallel light after passing through the collimating microlens 5-1, and then passes through the collimating micro lens
2020100778 19 May 2020 array substrate 5-2, diagonal to the MEMS reflector 2 and enters the space of the deflection optical window 4-1, arrives at the MEMS reflector 2 that has been deflected to a pre-set angle. At this time, the deflection angle of the MEMS reflector is different from the deflection angle set previously, it passes through the reflection of the MEMS reflector 2 and enters the space of the deflection optical window 4-1, then passes through the collimating microlens array substrate 5-2 and is coupled into the standard single-mode optical fiber 6-9 by the collimating microlens 5-1.
[0046] Based on the same principle, any fiber core optical paths of any seven-core optical fibers follows: the core of the seven-core optical fiber to the collimating microlens 5-1, the collimating microlens array substrate 5-2, the deflection optical window 4-1, the MEMS reflector 2, the deflection optical window 4-1, the collimating microlens array substrate 5-2, the collimating microlens 5-1, the standard single-mode optical fiber 6-9. To complete the function of being a multi-core optical fiber gate, the optical path of any cores of any seven-core optical fibers switching to the standard single-mode optical fiber 6-9, when the lengths of the deflection optical window is 2500 micrometers, the theoretical deflection angles needed by each core and the MEMS reflector are as follows:
Unit: Degree
TABLE 3
MEMS REFLECTOR
NUMBER 6-1-1 6-1-2 6-1-3 6-1-4 6-1-5 6-1-6 6-1-7
a-axis deflection angle -2.08186 -2.08186 -1.71375 -1.71375 -1.71375 -1.34421 -1.34421
b-axis deflection angle 1.50057 1.92644 1.28699 1.71375 2.13861 1.50057 1.92644
NUMBER 6-2-1 6-2-2 6-2-3 6-2-4 6-2-5 6-2-6 6-2-7
a-axis deflection angle -0.37214 -0.37214 0 0 0 0.37214 0.37214
2020100778 19 May 2020
b-axis deflection angle 1.50057 1.92644 1.28699 1.71375 2.13861 1.50057 1.92644
NUMBER 6-3-1 6-3-2 6-3-3 6-3-4 6-3-5 6-3-6 6-3-7
a-axis deflection angle 1.34421 1.34421 1.71375 1.71375 1.71375 2.08186 2.08186
b-axis deflection angle 1.50057 1.92644 1.28699 1.71375 2.13861 1.50057 1.92644
NUMBER 6-4-1 6-4-2 6-4-3 6-4-4 6-4-5 6-4-6 6-4-7
a-axis deflection angle -2.08186 -2.08186 -1.71375 -1.71375 -1.71375 -1.34421 -1.34421
b-axis deflection angle -0.21485 0.21485 -0.42964 0 0.42964 -0.21485 0.21485
NUMBER 6-5-1 6-5-2 6-5-3 6-5-4 6-5-5 6-5-6 6-5-7
a-axis deflection angle 1.34421 1.34421 1.71375 1.71375 1.71375 2.08186 2.08186
b-axis deflection angle -0.21485 0.21485 -0.42964 0 0.42964 -0.21485 0.21485
NUMBER 6-6-1 6-6-2 6-6-3 6-6-4 6-6-5 6-6-6 6-6-7
a-axis deflection angle -2.08186 -2.08186 -1.71375 -1.71375 -1.71375 -1.34421 -1.34421
b-axis deflection angle -1.92644 -1.50057 -2.13861 -1.71375 -1.28699 -1.92644 -1.50057
NUMBER 6-7-1 6-7-2 6-7-3 6-7-4 6-7-5 6-7-6 6-7-7
a-axis deflection angle -0.37214 -0.37214 0 0 0 0.37214 0.37214
b-axis deflection angle -1.92644 -1.50057 -2.13861 -1.71375 -1.28699 -1.92644 -1.50057
NUMBER 6-8-1 6-8-2 6-8-3 6-8-4 6-8-5 6-8-6 6-8-7
2020100778 19 May 2020
a-axis deflection angle 1.34421 1.34421 1.71375 1.71375 1.71375 2.08186 2.08186
b-axis deflection angle -1.92644 -1.50057 -2.13861 -1.71375 -1.28699 -1.92644 -1.50057
[0047] The seven-core optical fiber switch based on an MEMS reflector is packaged as shown in FIG.5. After the device packaging is completed, the deflection angle of MEMS reflector of each core can be corrected by online monitoring to make the device achieve its best use conditions.
[0048] Embodiment 2: A dual-core optical fiber switch based on an MEMS reflector.
[0049] A dual-core optical fiber switch based on an MEMS reflector, the cross-section view of the input-output fibers array 6 is shown in FIG. 6, the principle is the same as in Embodiment 1, the difference of this optical fiber switch is to use a standard single-mode optical fiber and two dual-core optical fibers as input and output.
[0050] Embodiment 3: A three-core optical fiber switch based on an MEMS reflector.
[0051] A three-core optical fiber switch based on an MEMS reflector, the cross-section view of the input-output fibers array 6 is shown in FIG. 7, the principle is the same as in Embodiment 1, the difference of this optical fiber switch is to use a standard single-mode optical fiber and three three-core optical fibers as input and output.
[0052] Embodiment 4: A four-core optical fiber switch based on an MEMS reflector.
2020100778 19 May 2020
[0053] A four-core optical fiber switch based on an MEMS reflector, the cross-section view of the input-output fibers array 6 is shown in FIG. 8 (a), the principle is the same as in Embodiment 1, but this optical fiber switch is to use a single-mode optical fiber and four center-symmetric four-core optical fibers as input and output.
[0054] A four-core optical fiber switch based on an MEMS reflector, the cross-section view of the input-output fibers array 6 is shown in FIG. 8 (b), the principle is the same as in Embodiment 1, the difference of this optical fiber switch is to use a single-mode optical fiber and four fourcore optical fibers with rectangular core distribution as input and output.
[0055] Embodiment 5: A five-core optical fiber switch based on an MEMS reflector.
[0056] A five-core optical fiber switch based on an MEMS reflector, the cross-section view of the input-output fibers array 6 is shown in FIG. 9, the principle is the same as in Embodiment 1, the difference of this optical fiber switch is to use a single-mode optical fiber and five five-core optical fibers as input and output.
[0057] Embodiment 6: A seven-core optical fiber switch based on an MEMS reflector.
[0058] A seven-core optical fiber switch based on an MEMS reflector, the cross-section view of the input-output fibers array 6 is shown in FIG. 10, the principle is the same as in Embodiment 1. FIG. 10 (a) is a seven-core optical fiber switch that uses a circular cross-section hard sleeve and the fibers in the input-output fibers array 6 are in a rectangular arrangement. FIG. 10 (b) is a seven-core optical fiber switch that uses a circular cross-section hard sleeve and the fibers in the input-output fibers array 6 are in a triangle-made-hexagonal arrangement. FIG. 10 (c) is a sevencore optical fiber switch that uses a rectangular cross-section hard sleeve and the fibers in the
2020100778 19 May 2020 input-output fibers array 6 are in a rectangular arrangement. FIG. 10 (d) is a seven-core optical fiber switch that uses a rectangular cross-section hard sleeve and the fibers in the input-output fibers array 6 are in a triangle-made-hexagonal arrangement.
[0059] Embodiment 7: A 19-core optical fiber switch based on an MEMS reflector.
[0060] A 19-core optical fiber switch based on an MEMS reflector, the cross-section view of the input-output fibers array 6 is shown in FIG. 11, the principle is the same as in Embodiment 1. This embodiment uses a circular cross-section hard sleeve and the nineteen 19-core optical fibers in the input-output fibers array 6 are in a rectangular arrangement
[0061] In the description and drawings, typical embodiments of the invention have been disclosed. The invention is not limited to these exemplary embodiments. The specific terms are only used for generality and illustrative meaning, and are not intended to limit the protected scope of the invention.

Claims (6)

1. A multi-core optical fiber switch based on an MEMS reflector, its characteristics are: the multi-core optical fiber switch based on an MEMS reflector is composed of a MEMS reflectors base, an MEMS reflector, a base housing, a deflection optical window housing, a collimating microlens array, an input-output fibers array, and a multi-core optical fiber switch device control driving board. The light incident through the input-output fibers array is collimated by the collimating microlens array to enter the deflection optical window, after deflected by the MEMS reflector, it is coupled by the collimating microlens array to the output fiber in the input-output fibers array. Through the control of the multi-core optical fiber switch control driving board to achieve the functions of multi-core optical fiber switch.
2. As claimed in claim 1, a multi-core optical fiber switch based on MEMS reflector, its characteristics are:
(1) The MEMS reflector can be rotated along two perpendicular spindles within certain angles, and align to the center of the collimating microlens which corresponds to the fiber core of the standard single-mode optical fiber.
(2) The multi-core optical fiber switch control driving board is composed of a controller interface and a MEMS driving board, and connected with pins drawn from the base of the MEMS reflector.
(3) The collimating microlens array is composed of a collimating microlens array substrate and collimating microlens on the substrate. Each collimating microlens corresponds to an optical fiber core, which collimates the light emitted from the fiber end into the MEMS reflector, and couples the parallel light reflected from the MEMS reflector into the optical fiber core.
(4) The input-output fibers array consists of a standard single-mode optical fiber which is in the center of the array, an M number of N-core optical fiber surrounding the standard single-mode optical fiber (M and N are integers greater than 1) and a hard sleeve, the Ncore optical fiber and standard single-mode optical fiber are fixed in the hard sleeve.
2020100778 19 May 2020
(5) The optical fiber arrangement of the input-output fibers array may be a triangular arrangement, a rectangular arrangement, or a circular arrangement; the hard sleeve section may be a circular cross-section, a triangular cross-section, or a rectangular crosssection.
(6) The multi-core optical fiber may be a dual-core optical fiber, a triple-core optical fiber, or other few-core optical fibers, or a multi-core optical fiber with a higher density and a larger number of cores, such as a 3 8-core optical fiber.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113091904A (en) * 2021-04-08 2021-07-09 哈尔滨工程大学 Micro-spectrum imaging system based on optical fiber integral view field unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113091904A (en) * 2021-04-08 2021-07-09 哈尔滨工程大学 Micro-spectrum imaging system based on optical fiber integral view field unit

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