CN111596412A - Multi-core optical fiber programmable multifunctional device based on array MEMS reflector - Google Patents
Multi-core optical fiber programmable multifunctional device based on array MEMS reflector Download PDFInfo
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- 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
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- G02B6/24—Coupling light guides
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Abstract
The invention provides a multi-core optical fiber programmable multifunctional device based on an array MEMS reflector. The device comprises an array MEMS reflector base, a base shell, an array MEMS reflector, a deflection light window shell, a collimation micro-lens array, an input-output optical fiber array and an MEMS reflector control driving board. The input and output optical fiber array is composed of at least two N-core optical fibers (N is an integer larger than 1) and at least N single-mode optical fibers. The light input by the input and output optical fiber array is collimated by the collimating micro-lens array, deflected by the array MEMS reflector and coupled into the input and output optical fiber array by the collimating micro-lens array for output. The functions which can be realized comprise a multicore fiber Fan-in/out device function, a multicore fiber switch function, a multicore fiber core gating function and a multicore fiber exchanger function, and the optical fiber switch has the advantages of small volume and quick response, and can be widely used in the fields of multicore fiber sensing, optical communication and the like.
Description
(I) technical field
The invention relates to a multi-core optical fiber programmable multifunctional device based on an array MEMS reflector, belonging to the technical field of optical communication, passive optical devices, multi-core optical fiber devices and optical fiber sensing.
(II) background of the invention
Currently, the transmission capacity of a single optical fiber has a bottleneck, and one of schemes for further increasing the capacity is to consider that a single fiber core is increased to multiple fiber cores, so that research on multi-core optical fibers attracts attention. Several different types of multicore fibers have been proposed and intensively studied. These studies are not only directed to high capacity, long distance applications, but also focus on high capacity, short distance services and large data passive optical network systems. In recent years, with the rise and popularization of the internet, the explosion development of emerging services and applications such as intelligent terminals, internet of things and cloud computing, the modern society enters an information explosion era, and the network bandwidth demand is increasing day by day.
The space division multiplexing technology using multi-core optical fiber as carrier makes full use of the dimension of space, can effectively improve the transmission capacity of single optical fiber and solve the bottleneck problem, and has been verified in ultra-high capacity long-distance optical fiber transmission systems and attracted extensive attention in the industry. The internal structure of a Micro-Electro-Mechanical System (MEMS) is generally in the micrometer or even nanometer level, and is an independent intelligent System, which is widely applied to the fields of electronic engineering, information engineering, biological engineering, and the like.
Patent No. CN110441862A proposes a crosstalk suppression type multicore fiber beam splitter with low insertion loss, which is an all-fiber device, has low fusion loss, and is suitable for splitting multicore fibers with high spatial density and multiple fiber cores. However, this device has the disadvantage that it cannot be pulled out individually for each core of a multicore fiber.
Patent No. CN106019490A discloses a 1 × N channel optical switch module, in which a multi-core collimator of an optical fiber array and an array lens are mounted in a tube cap. However, the device has the disadvantages that the device cannot be used for optical path switching of the multi-core fiber and cannot be used for gating different cores of the multi-core fiber.
Patent No. CN110868651A proposes an all-optical switching device, which includes a housing, an optical switching unit, and more than two sets of input collimators and output collimators. The switching of the optical path of the all-optical switching device is realized by adopting a mechanical control mode, and the all-optical switching device not only has the characteristics of low insertion loss, high isolation, independence of wavelength and polarization and the like, but also can reduce the volume and the complexity of the all-optical switching device. The device can realize the optical exchange among standard single-mode fibers, but cannot realize the optical exchange among fiber cores of more than two multi-core fibers, still has larger volume and is inconvenient to integrate.
Patent No. CN110658588A proposes a multifunctional optical switch and a control method thereof, which includes an input optical fiber, a coupling collimator, an off-axis parabolic mirror, and an output optical fiber. The optical coupling device is based on the optical characteristics of aberration elimination of a coupling collimating lens and an off-axis parabolic mirror, and can realize the coupling of optical fiber beams output from any position on a cylindrical surface with the central axis coaxial with the central axis of the cylindrical surface and the surface coincident with the focal point of the off-axis parabolic mirror by rotating and moving the off-axis parabolic mirror along the central axis of the cylindrical surface, so that coupling space resources are output by utilizing an optical switch to the maximum extent, and the number of optical coupling lenses and the structural design cost are reduced. The multi-fiber laser has the defects that the multi-fiber laser is mainly suitable for multi-option output occasions of single fiber lasers with different requirements on optical fiber output beams in various laser processing applications, the optical exchange between fiber cores of more than two multi-core fibers cannot be realized, and meanwhile, the multi-function is not realized by the functions of a plurality of optical devices.
With the development of the multi-core fiber and the improvement of the sensing technology, usually, different fiber cores of one multi-core fiber are subjected to some sensing or information acquisition, then the information of each fiber core is analyzed independently to avoid the mutual interference of different information, and then the acquired information is analyzed and processed in a unified manner, for example, the three-dimensional shape sensing technology based on the multi-core fiber, so that a huge practical requirement is provided for each fiber core of the multi-core fiber to be singly led out. Meanwhile, the use of the multi-core optical fiber can be obviously and effectively improved based on the miniaturization, integration and multi-functionalization of the multi-core optical fiber device.
Disclosure of the invention
The invention aims to provide a multicore optical fiber programmable multifunctional device based on an array MEMS reflector.
The purpose of the invention is realized as follows:
a multi-core fiber programmable multifunction device based on array MEMS reflectors is shown in fig. 1. The multi-core optical fiber programmable multifunctional device comprises an array MEMS reflector base 1, an array MEMS reflector 2, a base shell 3, a deflection optical window shell 4, a collimation micro-lens array 5, an input-output optical fiber array 6 and a multi-core optical fiber programmable multifunctional device control driving board. The control of the driving board can be controlled for the multi-core fiber programmable multifunctional device to realize various functions of the multifunctional device, such as a multi-core fiber Fan-in/out device function, a multi-core fiber switch, a multi-core fiber core gating function, a multi-core fiber exchanger function and the like.
Different functions of the multi-core fiber programmable multifunctional device based on the array MEMS reflector are obtained by different fiber inputs or different fiber outputs in the input and output fiber array 6; the light input by the input optical fiber in the input/output optical fiber array 6 enters the deflection optical window 4-1 after being collimated by the collimating micro-lens array 5, is reflected back to the deflection optical window 4-1 by the array MEMS reflector 2, and is coupled into the output optical fiber in the input/output optical fiber array 6 by the collimating micro-lens array 5.
The array MEMS reflector 2 of the multi-core optical fiber programmable multifunctional device based on the array MEMS reflector is an array formed by N (N is an integer larger than 1) MEMS reflectors which can rotate in a certain angle along two mutually vertical rotating shafts; each MEMS reflector is aligned with its corresponding core and the center of the collimating microlens. The rotation angle of each MEMS reflector in the array MEMS reflector 2 can be independently controlled by the multicore fiber programmable multifunctional device control driving board.
The multi-core optical fiber programmable multifunctional device control driving board of the multi-core optical fiber programmable multifunctional device based on the array MEMS reflector is composed of a controller interface and an MEMS driving board, and the MEMS driving board is connected with pins led out from a base 1 of the array MEMS reflector 2.
The collimating micro-lens array 5 of the multi-core optical fiber programmable multifunctional device based on the array MEMS reflector consists of a collimating micro-lens array substrate 5-2 (a substrate middle spacer is not shown) and collimating micro-lenses 5-1 on the substrate; each collimating micro lens 5-1 corresponds to an optical fiber core, and can collimate light emitted from the optical fiber end into parallel light to be incident on the array MEMS reflector 2 and also can couple the parallel light reflected by the array MEMS reflector 2 into the optical fiber core.
The input/output optical fiber array 6 of the multi-core optical fiber programmable multifunctional device based on the array MEMS reflector comprises an N-core optical fiber 7-1 positioned in the center of the array, at least one N-core optical fiber 7-2 surrounding the N-core optical fiber, at least N standard single-mode optical fibers and a hard sleeve, wherein the multi-core optical fiber and the standard single-mode optical fibers are fixed in the hard sleeve; the maximum value of the number N of multi-core optical fibers depends on the maximum deflection angle and the distribution pitch of the MEMS reflector 2. When the fiber core distance of the multi-core optical fiber is fixed, the maximum deflection angle of the MEMS reflector 2 is larger, and the maximum value of the number N of the multi-core optical fiber is larger; when the maximum deflection angle of the MEMS reflector 2 is fixed, the maximum value of the number N of the multi-core optical fibers is larger as the distance between the cores of the multi-core optical fibers is smaller.
The optical fiber arrangement mode of the input and output optical fiber array 6 of the multi-core optical fiber programmable multifunctional device based on the array MEMS reflector can be triangular arrangement or rectangular arrangement or circular arrangement; the section of the hard sleeve can be a circular section or a triangular section or a rectangular section. The multi-core fiber can be a few-core fiber such as a double-core fiber and a three-core fiber, or a multi-core fiber with higher density and more fiber cores such as a 38-core fiber.
The multi-core fiber Fan-in/out device function of the multi-core fiber programmable multifunctional device based on the array MEMS reflector inputs an optical signal of the programmable multifunctional device through a central multi-core fiber 7-1, the optical signal is emitted from the multi-core fiber, is immediately collimated by a collimating micro-lens array 5, passes through a deflection optical window 4-1, is reflected back to the deflection optical window 4-1 by an array MEMS reflector 2 at a corresponding deflection angle respectively, and is coupled into a corresponding standard single-mode fiber through the collimating micro-lens array 5; optical signals of the programmable multifunctional device are input by a plurality of standard single-mode optical fibers, are emergent from the standard single-mode optical fibers, are immediately collimated by the collimating micro-lens array 5, then obliquely enter the deflecting optical window 4-1 towards the array MEMS reflector 2, are reflected back to the deflecting optical window 4-1 by the array MEMS reflector 2 at corresponding deflecting angles respectively, and are coupled into corresponding fiber cores of the central multi-core optical fiber 7-1 by the collimating micro-lens array 5 respectively.
When the multi-core fiber programmable multifunctional device based on the array MEMS reflector is used as a multi-core fiber switch, an optical signal of the multi-core fiber switch is input by a standard single-mode fiber, is emitted from the standard single-mode fiber, is immediately collimated by the collimating micro-lens array 5, passes through the deflection optical window 4-1, is reflected back to the deflection optical window 4-1 by the array MEMS reflector 2 at a corresponding deflection angle, and is coupled into a fiber core of the central multi-core fiber 7-1 by the collimating micro-lens array 5.
When the multi-core fiber programmable multifunctional device based on the array MEMS reflector is used as a multi-core fiber gating device, an optical signal of a multi-core fiber switch is input through a fiber core of a central multi-core fiber 7-1 of an input-output fiber array 6, is emergent from the multi-core fiber, is immediately collimated through a collimating micro-lens array 5, enters a deflecting optical window 4-1 towards an array MEMS reflector 2, is reflected back to the deflecting optical window 4-1 by the array MEMS reflector 2 at a corresponding deflecting angle, and is coupled into a single-mode fiber through the collimating micro-lens array 5.
When the multi-core fiber programmable multifunctional device based on the array MEMS reflector is used as a multi-core fiber exchanger, optical signals of the multi-core fiber exchanger are input by each fiber core of a multi-core fiber 7-1 at the center of an input/output fiber array 6, are emitted from the multi-core fiber, are immediately collimated by a collimating micro-lens array 5, then pass through a deflection optical window 4-1, are reflected back to the deflection optical window 4-1 by an array MEMS reflector 2 at corresponding deflection angles respectively, and then are coupled into the fiber cores of surrounding multi-core fibers 7-2 corresponding to the input/output fiber array 6 by the collimating micro-lens array 5; optical signals input into the multicore fiber exchanger through each fiber core of the multicore fibers 7-2 around the input and output fiber array 6 are immediately collimated by the collimating micro-lens array 5 after being emitted from the surrounding multicore fibers, enter the deflecting optical window 4-1 in an inclined direction towards the array MEMS reflector 2, are reflected back to the deflecting optical window 4-1 by the array MEMS reflector 2 at corresponding deflecting angles respectively, and are coupled into each fiber core of the multicore fibers 7-1 in the center of the input and output fiber array 6 through the collimating micro-lens array 5.
The invention has the beneficial effects that:
1. the device integration level is high, and the fiber core density of the multi-core optical fiber can be effectively improved through the highly integrated device.
2. The multicore fiber programmable multifunctional device based on the array MEMS reflector can effectively keep the consistency of each fiber core channel or the difference of special requirements for a long time because each MEMS reflector can be independently adjusted and is slightly influenced by the temperature, the humidity and the like of the external environment, and is particularly suitable for multicore fiber sensing application.
3. After the encapsulation is finished, the manufacturing of the multi-core optical fiber programmable multifunctional device can be finished only by adjusting the angle of the array MEMS reflector, the yield of the multi-core optical fiber programmable multifunctional device is improved, the redundant design is convenient, and the later-period device maintenance is convenient.
4. The invention can realize the multicore fiber programmable multifunctional device based on the array MEMS reflector, can be used for multicore fiber Fan-in/out of multicore fiber, multicore fiber optical switches, multicore fiber gating devices and fiber core optical exchange among the multicore fibers, concentrates four devices on one device of the invention, and can greatly enrich the functions of the multicore fiber device, reduce the volume and improve the utilization rate of the device.
(IV) description of the drawings
FIG. 1 is a schematic diagram of a seven-core fiber programmable multifunction device structure based on an array MEMS reflector. This embodiment is an input-output fiber array 6 composed of two seven-core fibers and seven standard single-mode fibers. The reference numbers in the figures are: the MEMS optical fiber array comprises a base 1 of an array MEMS reflector, an array MEMS reflector 2, a base shell 3, a deflection optical window shell 4, a deflection optical window 4-1, a collimation micro-lens array 5, a collimation micro-lens 5-1, a collimation micro-lens array substrate 5-2, an input and output optical fiber array 6, a seven-core optical fiber 7-1 positioned in the center of the input and output optical fiber array 6, and fiber cores 7-1-1 to 7-1-7 of the seven-core optical fiber 7-1; a surrounding seven-core optical fiber 7-2, and standard single mode optical fibers 8-1 to 8-7.
FIG. 2 is a schematic diagram of the structure of an array MEMS reflector 2 of a seven-core fiber programmable multifunction device based on the array MEMS reflector. The reference numbers in the figures are: MEMS reflectors 2-1 to 2-7.
FIG. 3 is a schematic diagram of an end face structure of a seven-core fiber programmable multifunctional device based on an array MEMS reflector. The reference numbers in the figures are: the cores 7-2-1 to 7-2-7 of the seven-core optical fiber 7-2.
FIG. 4 is a seven-core fiber Fan-in/out functional scheme block diagram of a seven-core fiber programmable multifunction device based on an array MEMS reflector.
FIG. 5 is a corresponding diagram of a core optical path of the seven-core fiber Fan-in/out function of the seven-core fiber programmable multifunctional device based on the MEMS reflector array.
FIG. 6 is an operational optical path diagram of the seven-core fiber Fan-in/out function of the seven-core fiber programmable multifunction device based on the array MEMS reflector.
FIG. 7 is a block diagram of a seven-core fiber switch functional scheme for a seven-core fiber programmable multifunction device based on an array MEMS reflector.
Fig. 8 is an operational optical path diagram of the seven-core fiber programmable multifunction device seven-core fiber switch function based on the array MEMS reflector.
FIG. 9 is a block diagram of a seven-core fiber switch functional scheme for a seven-core fiber programmable multifunction device based on an array MEMS reflector.
FIG. 10 is an optical path diagram of the operation of the seven-core fiber switch function of the seven-core fiber programmable multifunction device based on the array MEMS reflector.
FIG. 11 is a diagram of a seven-core fiber programmable multifunction device package based on an array MEMS reflector.
FIG. 12 is a cross-sectional view of the input-output fiber array 6 of the dual-core fiber programmable multifunction device based on array MEMS reflectors; FIG. 12(a) is a dual-core fiber programmable multifunction device using a circular section rigid sleeve and the optical fibers in the input/output fiber array 6 are arranged in a rectangular shape; FIG. 12(b) is a dual-core fiber programmable multifunction device using a rigid ferrule with a rectangular cross section and the optical fibers in the input/output fiber array 6 are arranged in a rectangular shape; FIG. 12(c) is a dual-core fiber programmable multifunction device using a circular section rigid sleeve and the fibers in the input/output fiber array 6 are arranged in a triangle; fig. 12(d) shows a dual-core fiber programmable multifunction device using a rigid sleeve with a rectangular cross section and the optical fibers in the input/output fiber array 6 are arranged in a triangular shape.
FIG. 13 is a cross-sectional view of the input-output fiber array 6 of the three-core fiber programmable multifunction device based on array MEMS reflectors.
FIG. 14 is a cross-sectional view of the input-output fiber array 6 of the quad-core fiber programmable multifunction device based on array MEMS reflectors; wherein the four-core optical fiber in fig. 14(a) is a centrosymmetric four-core optical fiber; the four-core fiber in fig. 14(b) is a four-core fiber having a rectangular core distribution.
FIG. 15 is a cross-sectional view of the input-output fiber array 6 of the five-core fiber programmable multifunction device based on array MEMS reflectors.
FIG. 16 is a cross-sectional view of the input-output fiber array 6 of a 19-core fiber programmable multifunction device based on array MEMS reflectors.
(V) detailed description of the preferred embodiments
The working principle of the invention is explained in the following with the accompanying drawings and specific embodiments to further explain the invention.
Example 1: the seven-core optical fiber Fan-in/out function of the seven-core optical fiber programmable multifunctional device based on the array MEMS reflector.
The structural schematic diagram of the seven-core optical fiber programmable multifunctional device based on the array MEMS reflector is shown in FIG. 1, and comprises an array MEMS reflector 2, a base housing 3, a deflection light window housing 4, a collimation micro-lens array 5, an input-output optical fiber array 6 and an MEMS reflector control driving board (not shown). The input and output optical fiber array 6 comprises two seven-core optical fibers and seven standard single-mode optical fibers.
Techniques for fabricating MEMS reflectors 2 are well known and are preferably implemented as high performance arrayed MEMS reflectors 2, two-dimensional reflectors in which each reflector in the array can be individually controlled, and which are small in size, fast, stable and fast. With respect to the arrayed MEMS reflector 2, the present invention has particular features that are employed to yield the superior performance of the preferred embodiments of the present invention. In this embodiment, the device adopts a special distribution form of the array MEMS reflectors 2 as shown in the structural schematic diagram of the array MEMS reflector 2 in fig. 2, and serves as a multi-core fiber programmable multifunctional device, in order to match with multi-core fibers with different fiber numbers, the array MEMS reflector 2 is almost identical to the fiber core distribution of the multi-core fibers used by the device in height, so as to reduce the deflection angles of the different MEMS reflectors 2 in the array, and to ensure that all the array MEMS reflectors 2 are maintained on the same plane, so that array manufacturing is adopted, and the batch manufacturing difficulty and the installation difficulty can be effectively reduced.
In the present embodiment, a collimating micro-lens array 5 as shown in fig. 1 is provided, the collimating micro-lens array 5 can be precisely manufactured by using a flat etching technique, and has the characteristics of small diameter and short focal length, the collimating micro-lenses 5-1 are arranged on a collimating micro-lens array substrate 5-2 (the middle spacing substrate is not shown), and the substrate can be made of quartz, which is convenient for manufacturing and installation. When mounting the collimator microlens substrate 5-2, the substrate is uniquely defined to be mounted in the deflection light window, and at the same time, the collimator microlens array 5 on the substrate is precisely defined at an accurate position.
With respect to the collimating microlens array 5, the present invention has particular features that are employed to produce the superior performance of the preferred embodiments of the present invention. In this embodiment, the device adopts a special distribution form of the collimating micro-lens array 5 as shown in fig. 1, and serves as a multi-core fiber programmable multifunctional device, in order to match multi-core fibers with different fiber core numbers, it is ensured that light beams emitted from each multi-core fiber can pass through one collimating micro-lens 5-1, and are well collimated and then emitted to the MEMS reflector 2, and then parallel light beams reflected from the MEMS reflector 2 can be coupled into a standard single-mode fiber through the collimating micro-lens 5-1; meanwhile, the light beams emitted from each standard single-mode fiber can pass through a collimating micro-lens 5-1 and are well collimated and then emitted to the MEMS reflector 2, and then the parallel light beams reflected from the MEMS reflector 2 can be coupled into a fiber core of the multi-core fiber through the collimating micro-lens 5-1. Therefore, the collimating micro-lens array 5 must correspond to the core distribution of the multi-core fiber used in the device, the distribution of the multi-core fiber and the standard single-mode fiber one by one, and then the collimation and the coupling of the multi-core fiber and the standard single-mode fiber can be realized.
The following is a detailed description of a preferred parameter.
The schematic cross-sectional structure of the input/output optical fiber array 6 is shown in fig. 1, the section of the hard sleeve is circular, the optical fibers are arranged in a rectangular mode, the seven-core optical fibers and the standard single-mode optical fibers are distributed in a shape like a Chinese character 'tian', one of the seven-core optical fibers is positioned in the center of the Chinese character 'tian', the number of the seven-core optical fiber is 7-1, the rest seven-core optical fibers and the rest seven standard single-mode optical fibers are distributed around the Chinese character 'tian', the number of the seven-core optical fibers is 7-2, the number of the seven standard single-mode optical fibers is respectively 8-1 to 8-7 from the upper left, and the transverse and longitudinal distances between; the fiber cores of the selected seven-core optical fiber 7-1 are distributed schematically as shown in figure 1, the numbers are respectively 7-1-1 to 7-1-7 from the left lower part, the middle core is 7-1-4, the middle core 7-1-4 is positioned in the center of the seven-core optical fiber, the other six cores are distributed at six vertexes of a regular hexagon, the diameter of the optical fiber is 125 micrometers, and the distance between the fiber cores is 35 micrometers. On the cross section of the input and output optical fiber array 6, a plane rectangular coordinate system is established by selecting a middle core 7-1-4 of a seven-core optical fiber 7-1 as a coordinate origin, the direction of the seven-core optical fiber 7-2 is the positive direction of an X axis, and the direction of a standard single-mode optical fiber 8-2 is the positive direction of a Y axis. The fiber core center coordinates of each fiber core of the seven-core optical fiber and the standard single-mode optical fiber are shown in the following table:
unit: micron meter
Each MEMS reflector in the array MEMS reflector 2 can be independently controlled, as shown in FIG. 2, each MEMS reflector has two mutually perpendicular rotating shafts, for convenience of description, the programmable multifunctional device is horizontally placed in a positive mode, the rotating shaft in the horizontal direction is a b-axis, the MEMS reflector rotates upwards to be defined as a positive direction of the b-axis, the rotating angle of the b-axis is a positive number, the MEMS reflector rotates downwards to be defined as a negative direction of the b-axis, and the rotating angle of the b-axis is a negative number; the rotating shaft in the vertical direction is an a-axis, the MEMS reflector rotates rightwards to be defined as the positive direction of the a-axis, the rotating angle of the a-axis is a positive number, the MEMS reflector rotates leftwards to be defined as the negative direction of the a-axis, and the rotating angle of the a-axis is a negative number. The distribution of the array MEMS reflector 2, which corresponds strictly to the core distribution of the multicore fiber, is numbered from 2-1 to 2-7 from the bottom left.
The basic workflow of the seven-core fiber programmable multifunction device based on arrayed MEMS reflectors is shown in fig. 4 and is specifically implemented as such. After the programmable multifunctional device is started, the function of the multi-core optical fiber Fan-in/out is selected, standard single-mode optical fibers corresponding to different fiber cores of the multi-core optical fiber can be read according to a preset program or a program compiled by a user, the deflection angle of the preset MEMS reflector 2 is corrected in advance by utilizing a controller control interface, a corresponding control signal is output and transmitted to an MEMS drive board, the MEMS drive board is converted into corresponding drive voltage or current according to the received control signal and transmitted to the MEMS drive board, the drive board is converted into corresponding drive voltage or current according to the received control signal and transmitted to the MEMS reflector 2, and the deflection of each MEMS reflector is controlled to a respective preset angle.
If the function of the device is to need to separately tap the optical signal in a multi-core fiber to each standard single-mode fiber, then one way of tapping that can be, but is not the only one, is that shown in fig. 5. The basic principle of the optical path is illustrated by the schematic cross-sectional view of the central axis of the programmable multifunctional device, as shown in fig. 6. Taking the upper core and the lower core of the seven-core optical fiber 7-1 as an example, light emitted from the upper core 7-1-5 of the seven-core optical fiber is collimated into parallel light after passing through the collimating micro lens 5-1, enters the space of the deflecting optical window 4-1 through the collimating micro lens array substrate 5-2, reaches the MEMS reflector 2-5 deflected to a preset angle, enters the space of the deflecting optical window 4-1 through the reflection of the MEMS reflector 2-5, passes through the collimating micro lens array substrate 5-2, and is coupled into the standard single-mode optical fiber 8-2 by the collimating micro lens 5-1. Light emitted from a lower core 7-1-3 of the seven-core optical fiber 7-1 is collimated into parallel light after passing through a collimating micro-lens 5-1, enters a space of a deflecting light window 4-1 through a collimating micro-lens array substrate 5-2, reaches an MEMS reflector 2-3 deflected to a preset angle, enters a space of the deflecting light window 4-1 through reflection of the MEMS reflector 2-3, passes through the collimating micro-lens array substrate 5-2, and is coupled into a standard single-mode optical fiber 8-6 by the collimating micro-lens 5-1.
Based on the same principle, other fiber core light paths of the seven-core optical fiber 7-1 are transmitted to the collimating micro-lens 5-1, the collimating micro-lens array substrate 5-2, the deflecting light window 4-1, the array MEMS reflector 2, the deflecting light window 4-1, the collimating micro-lens array substrate 5-2, the collimating micro-lens 5-1 and the standard single-mode optical fiber according to different fiber cores of the seven-core optical fiber. The corresponding relationship is as follows:
in order to complete the above optical path, if the length of the deflection optical window is 2000 μm, the theoretical deflection angle of each MEMS reflector at this time is as follows:
unit: degree of rotation
If the function of the device is to require the separate introduction of the light of a standard single-mode fibre into the different cores of the seven-core fibre 7-1, in the manner according to figure 5 but not the only corresponding manner. The corresponding relationship is as follows:
the basic light path takes standard single-mode fibers 8-1 and 8-4 as an example, light emitted by the standard single-mode fiber 8-1 is collimated into parallel light after passing through a collimating micro-lens 5-1, passes through a collimating micro-lens array substrate 5-2, obliquely enters a space of a deflecting light window 4-1 towards an array MEMS reflector 2, reaches the MEMS reflector 2-2 deflected to a preset angle, enters the space of the deflecting light window 4-1 after being reflected by the MEMS reflector 2-2, passes through the collimating micro-lens array substrate 5-2, and is coupled into a side core 7-1-2 of a seven-core fiber 7-1 by the collimating micro-lens 5-1. Light emitted by the standard single-mode optical fiber 8-4 is collimated into parallel light after passing through the collimating micro-lens 5-1, enters a space of the deflecting optical window 4-1 obliquely towards the array MEMS reflector 2 through the collimating micro-lens array substrate 5-2, reaches the MEMS reflector 2-4 deflected to a preset angle, at the moment, in order to ensure better coupling, the deflection angle of the MEMS reflector 2-4 is different from the deflection angle of the multi-core optical fiber 7-1 to the standard single-mode optical fiber which are in the same corresponding relation before, enters the space of the deflecting optical window 4-1 through reflection of the MEMS reflector 2-4, passes through the collimating micro-lens array substrate 5-2, and is coupled into a middle core 7-1-4 of the seven-core optical fiber 7-1 by the collimating micro-lens 5-1.
Based on the same principle, the optical paths of other standard single-mode fibers are transmitted according to the paths from the standard single-mode fibers to different fiber cores of the collimating micro-lens 5-1, the collimating micro-lens array substrate 5-2, the deflecting optical window 4-1, the array MEMS reflector 5, the deflecting optical window 4-1, the collimating micro-lens array substrate 5-2, the collimating micro-lens 5-1 and the seven-core fiber 7-1.
In order to complete the above optical path, if the length of the deflection optical window is 2000 μm, the theoretical deflection angle of each MEMS reflector at this time is due to the slight change of the optical path, which corresponds to the following:
unit: degree of rotation
Example 2: the seven-core optical fiber programmable multifunctional device based on the array MEMS reflector has a seven-core optical fiber switch function.
The seven-core fiber-optic switch function of the seven-core fiber-optic programmable multifunctional device based on the array MEMS reflector is another function based on the embodiment 1, so the corresponding parameters are consistent with the embodiment 1. The basic workflow of the seven-core fiber programmable multifunction device seven-core fiber switch based on the array MEMS reflector is shown in fig. 7, and is specifically realized. After the seven-core optical fiber programmable multifunctional device is started, a multi-core optical fiber function is selected, channel signals needing to be converted can be selected according to a user, signals for automatically switching channels can be read according to a preset program or a program compiled by the user, the deflection angle of a preset array MEMS reflector 2 is corrected in advance by utilizing a controller control interface, corresponding control signals are output and transmitted to an MEMS drive board, the MEMS drive board is converted into corresponding driving voltage or current according to the received control signals and transmitted to the array MEMS reflector 2, and the deflection of the array MEMS reflector 2 is controlled to reach the preset angle.
The device functions as a multi-core fiber switch, and when an optical signal in a standard single-mode fiber needs to be sent to one fiber core of a certain multi-core fiber to send an optical signal in a standard single-mode fiber 8-4 to the middle core 7-1-4 of a seven-core fiber 7-1, the basic principle of an optical path is shown in fig. 8, for example, by a schematic cross-sectional view of the multi-core fiber switch. Light emitted by a fiber core of a standard single-mode optical fiber 8-4 is collimated into parallel light after passing through a collimating micro-lens 5-1, enters a space of a deflecting optical window 4-1 through a collimating micro-lens array substrate 5-2, reaches an array MEMS reflector 2 deflected to a preset angle, enters a space of the deflecting optical window 4-1 through reflection of the array MEMS reflector 2, passes through the collimating micro-lens array substrate 5-2, and is coupled into a middle core 7-1-4 of a seven-core optical fiber 7-1 by the collimating micro-lens 5-1. For example, when the optical signal of the standard single mode optical fiber 8-4 is transmitted to the side core 7-1-7 of the seven-core optical fiber 7-1. Light emitted by a fiber core of a standard single-mode optical fiber 8-4 is collimated into parallel light after passing through a collimating micro-lens 5-1, enters a space of a deflecting optical window 4-1 through a collimating micro-lens array substrate 5-2, reaches an array MEMS reflector 2 which has been deflected to a preset angle larger than that just sent to a middle core 7-1-4, enters the space of the deflecting optical window 4-1 through reflection of the array MEMS reflector 2, passes through the collimating micro-lens array substrate 5-2, and is coupled into an upper core 7-1-7 of a seven-core optical fiber 7-1 through the collimating micro-lens 5-1.
Based on the same principle, the optical signal of the standard single-mode fiber 8-4 is sent to different fiber core optical paths of other seven-core fibers according to the standard single-mode fiber 8-4 to the collimating micro-lens 5-1, the collimating micro-lens array substrate 5-2, the deflecting optical window 4-1, the array MEMS reflector 2, the deflecting optical window 4-1, the collimating micro-lens array substrate 5-2, the collimating micro-lens 5-1 and any fiber core of any seven-core fiber. In order to complete the optical path switched from the standard single-mode fiber 8-4 to any fiber core of any seven-core fiber, if the length of the deflecting optical window is 2000 μm, the theoretical deflecting angle required by the array MEMS reflector 2 to each fiber core at this time corresponds to the following:
unit: degree of rotation
If the device is used as a fiber core gating device of the multi-core fiber, an optical signal of a certain fiber core of a certain seven-core fiber is led out to the central standard single-mode fiber 8-4, and on the premise that optical power needs to be ensured and loss is reduced, the optical paths from the standard single-mode fiber to any fiber core of the multi-core fiber and from the fiber core of the multi-core fiber to the standard single-mode fiber are slightly different. Taking the upper and lower side cores of the seven-core optical fiber 7-2 as an example, light emitted from the upper side core 7-2-5 of the seven-core optical fiber 7-2 is collimated into parallel light after passing through the collimating micro lens 5-1, passes through the collimating micro lens array substrate 5-2 and the oblique array MEMS reflector 2, enters the space of the deflecting optical window 4-1, reaches the array MEMS reflector 2 which is deflected to a preset angle corresponding to the multi-core optical fiber gate, is reflected by the array MEMS reflector 2, enters the space of the deflecting optical window 4-1, passes through the collimating micro lens array substrate 5-2, and is coupled into the standard single-mode optical fiber 8-4 by the collimating micro lens 5-1. Light emitted by a lower core 7-2-3 of the seven-core optical fiber 7-2 is collimated into parallel light after passing through a collimating micro-lens 5-1, passes through a collimating micro-lens array substrate 5-2, enters a space of a deflecting optical window 4-1 by an oblique array MEMS reflector 2, reaches the array MEMS reflector 2 which has deflected to a preset angle corresponding to a multi-core optical fiber gate, is different from the previous deflecting angle at the moment, enters the space of the deflecting optical window 4-1 by reflection of the array MEMS reflector 2, passes through the collimating micro-lens array substrate 5-2, and is coupled into a standard single-mode optical fiber 8-4 by the collimating micro-lens 5-1.
Based on the same principle, any fiber core light path of any seven-core optical fiber is transmitted according to the path from the fiber core of the seven-core optical fiber to the collimating micro-lens 5-1, the collimating micro-lens array substrate 5-2, the deflecting optical window 4-1, the array MEMS reflector 2, the deflecting optical window 4-1, the collimating micro-lens array substrate 5-2, the collimating micro-lens 5-1 and the standard single-mode optical fiber 8-4. In order to complete the function as a multi-core fiber gating device, if the length of a deflection optical window is 2000 microns, and then each multi-core fiber core reaches the standard single-mode fiber 8-4, the theoretical deflection angle required by the array MEMS reflector 2 to deflect corresponds to the following:
unit: degree of rotation
Example 3: the seven-core fiber programmable multifunctional device based on the array MEMS reflector has the function of a seven-core fiber exchanger.
The seven-core fiber switch function of the seven-core fiber programmable multifunctional device based on the array MEMS reflector is another function based on the embodiment 1, so the corresponding parameters are consistent with the embodiment 1. The basic workflow of the seven-core fiber programmable multifunction device seven-core fiber switch based on the array MEMS reflector is shown in fig. 9, and is specifically realized. After the seven-core optical fiber programmable multifunctional device is started, the function of the exchanger is selected, the fiber core needing optical exchange can be selected by a user, the fiber core needing optical exchange can also be read out according to a preset program or a program programmed by the user, the preset deflection angle of the array MEMS reflector 2 is corrected in advance by utilizing a controller control interface, a corresponding control signal is output and transmitted to an MEMS drive board, the MEMS drive board is converted into a corresponding driving voltage or current according to the received control signal and transmitted to the array MEMS reflector 2, and the deflection of the array MEMS reflector 2 is controlled to reach the preset angle.
If the function of the device is to switch the optical signals in the central seven-core fiber 7-1 of the input-output fiber array 6 to the different cores of the surrounding seven-core fibers 7-2, then a switching method that can be used but is not the only one is such that the basic principle of the optical path is illustrated by the schematic cross-sectional view of the switch, as shown in fig. 10. Taking the side core 7-1-2 and the middle core 7-1-4 of the middle seven-core optical fiber 7-1 as an example, light emitted from the side core 7-1-2 of the seven-core optical fiber 7-1 is collimated into parallel light after passing through the collimating micro lens 5-1, enters the space of the deflecting optical window 4-1 through the collimating micro lens array substrate 5-2, reaches the MEMS reflector 2-2 which has been deflected to a preset angle, enters the space of the deflecting optical window 4-1 through the reflection of the MEMS reflector 2-2, passes through the collimating micro lens array substrate 5-2, and is coupled into the side core 7-2-7 of the seven-core optical fiber 7-2 by the collimating micro lens 5-1. Light emitted from a middle core 7-1-4 of the seven-core optical fiber 7-1 is collimated into parallel light after passing through a collimating micro lens 5-1, enters a space of a deflecting light window 4-1 through a collimating micro lens array substrate 5-2, reaches an MEMS reflector 2-4 deflected to a preset angle, enters a space of the deflecting light window 4-1 through reflection of the MEMS reflector 2-4, passes through the collimating micro lens array substrate 5-2, and is coupled into a side core 7-2-2 of the seven-core optical fiber 7-2 by the collimating micro lens 5-1.
Based on the same principle, other fiber core optical paths of the seven-core optical fiber 7-1 are transmitted to the corresponding fiber core paths of the collimating micro-lens 5-1, the collimating micro-lens array substrate 5-2, the deflecting optical window 4-1, the array MEMS reflector 2, the deflecting optical window 4-1, the collimating micro-lens array substrate 5-2, the collimating micro-lens 5-1 and the seven-core optical fiber 7-2 according to different fiber cores of the seven-core optical fiber 7-1, and therefore the multi-core optical fiber exchange is completed. The complete correspondence is as follows:
in order to complete the above optical path, if the length of the deflection optical window is 2000 μm, the theoretical deflection angle of each MEMS reflector at this time is as follows:
unit: degree of rotation
If the function of the device is to switch light in the side seven-core fibers 7-2 of the input and output fiber array 6 to different cores in the middle seven-core fiber 7-1 of the input and output fiber array 6, one way of switching but not the only way of switching. The corresponding relationship is as follows:
if the function of the device is to switch the optical signals in the seven-core fiber 7-2 beside the input and output fiber array 6 to the different cores of the middle seven-core fiber 7-1, then this is one way of switching that can be used but not the only way. Taking the side core 7-2-1 and the middle core 7-2-4 of the seven-core optical fiber 7-2 as an example, light emitted from the side core 7-2-2 of the seven-core optical fiber 7-2 is collimated into parallel light after passing through the collimating micro lens 5-1, enters the space of the deflecting optical window 4-1 through the collimating micro lens array substrate 5-2 and the oblique array MEMS reflector 2, reaches the MEMS reflector 2-7 which has been deflected to a preset angle, enters the space of the deflecting optical window 4-1 through the reflection of the MEMS reflector 2-7, passes through the collimating micro lens array substrate 5-2, and is coupled into the side core 7-1-7 of the seven-core optical fiber 7-1 by the collimating micro lens 5-1. Light emitted from a middle core 7-2-4 of the seven-core optical fiber 7-2 is collimated into parallel light after passing through a collimating micro-lens 5-1, passes through a collimating micro-lens array substrate 5-2, enters a space of a deflecting optical window 4-1 through an oblique array MEMS reflector 2, reaches an MEMS reflector 2-3 deflected to a preset angle, enters a space of the deflecting optical window 4-1 through reflection of the MEMS reflector 2-3, passes through the collimating micro-lens array substrate 5-2, and is coupled into a side core 7-1-3 of the seven-core optical fiber 7-1 by the collimating micro-lens 5-1.
Based on the same principle, other fiber core optical paths of the seven-core optical fiber 7-2 are transmitted to the corresponding fiber core paths of the collimating micro-lens 5-1, the collimating micro-lens array substrate 5-2, the deflecting optical window 4-1, the array MEMS reflector 2, the deflecting optical window 4-1, the collimating micro-lens array substrate 5-2, the collimating micro-lens 5-1 and the seven-core optical fiber 7-1 according to different fiber cores of the seven-core optical fiber 7-2, and therefore the multi-core optical fiber exchange is completed.
In order to complete the above optical path, if the length of the deflection optical window is 2000 μm, the theoretical deflection angle of each MEMS reflector at this time is due to the slight change of the optical path, which corresponds to the following:
unit: degree of rotation
In order to ensure the good working state of the device, a redundancy design can be adopted, and the number of single-mode optical fibers can be more than that of multi-core optical fibers. After the seven-core fiber programmable multifunctional device based on the array MEMS reflectors is packaged, as shown in FIG. 11, after the device packaging is completed, the deflection angle of each MEMS reflector can be corrected in an on-line monitoring mode, so that the device can reach the optimal use condition.
Example 4: a dual-core fiber programmable multifunctional device based on an array MEMS reflector.
The cross section of the input and output optical fiber array 6 of the dual-core optical fiber programmable multifunctional device based on the array MEMS reflector is shown in FIG. 12, and the principle is the same as that of the embodiments 1, 2 and 3. Fig. 12(a) is a two-core fiber programmable multifunctional device using a circular section rigid sleeve and the optical fibers in the input and output fiber array 6 are arranged in a rectangular shape, wherein the input and output fiber array 6 comprises two-core fibers and seven standard single-mode fibers; fig. 12(b) is a dual-core fiber programmable multifunctional device using a rigid sleeve with a rectangular cross section and the fibers in the input/output fiber array 6 are arranged in a rectangular shape, wherein the input/output fiber array 6 comprises two dual-core fibers and seven standard single-mode fibers; fig. 12(c) is a dual-core fiber programmable multifunctional device using a circular section rigid sleeve and the fibers in the input/output fiber array 6 are arranged in a triangle, wherein the input/output fiber array 6 includes two dual-core fibers and five standard single-mode fibers; fig. 12(d) is a dual-core fiber programmable multifunctional device using a rigid sleeve with a rectangular cross section and the fibers in the input and output fiber array 6 are arranged in a triangle, wherein the input and output fiber array 6 includes two dual-core fibers and five standard single-mode fibers.
Example 5: a three-core optical fiber programmable multifunctional device based on an array MEMS reflector.
The cross section of the input and output optical fiber array 6 of the three-core optical fiber programmable multifunctional device based on the array MEMS reflector is shown in FIG. 13, the principle is the same as that of the embodiments 1, 2 and 3, but the optical fiber programmable multifunctional device uses two three-core optical fibers and seven standard single-mode optical fibers as input and output.
Example 6: a four-core optical fiber programmable multifunctional device based on an array MEMS reflector.
The cross section of the input/output fiber array 6 of the four-core fiber programmable multifunctional device based on the array MEMS reflector is shown in FIG. 14(a), and the principle is the same as that of the embodiments 1, 2 and 3, but the fiber programmable multifunctional device uses two centrosymmetric four-core fibers and seven standard single-mode fibers as input/output. The cross section of the input/output fiber array 6 of the four-core fiber programmable multifunctional device based on the array MEMS reflector is shown in FIG. 14(b), and the principle is the same as that of the embodiments 1, 2 and 3, but the four-core fiber with two cores distributed in a rectangular shape and seven standard single-mode fibers are used as input/output of the fiber programmable multifunctional device.
Example 7: a five-core optical fiber programmable multifunctional device based on an array MEMS reflector.
The cross section of the input and output optical fiber array 6 of the five-core optical fiber programmable multifunctional device based on the array MEMS reflector is shown in FIG. 15, the principle is the same as that of the embodiments 1, 2 and 3, but the optical fiber programmable multifunctional device uses two five-core optical fibers and seven standard single-mode optical fibers as input and output.
Example 8: a19-core fiber programmable multifunction device based on an array MEMS reflector.
The cross section of the input and output optical fiber array 6 of the 19-core optical fiber programmable multifunctional device based on the array MEMS reflector is shown in FIG. 16, the principle is the same as that of the embodiments 1, 2 and 3, but the optical fiber programmable multifunctional device uses three 19-core optical fibers and 29 standard single-mode optical fibers as input and output.
In the description and drawings, there have been disclosed typical embodiments of the invention. The invention is not limited to these exemplary embodiments. Specific terms are used in a generic and descriptive sense only and not for purposes of limitation, the scope of the invention being set forth.
Claims (8)
1. The multi-core fiber programmable multifunctional device based on the array MEMS reflector is characterized in that: the multi-core fiber programmable multifunctional device comprises an array MEMS reflector base, an array MEMS reflector, a base shell, a deflection light window shell, a collimation microlens array, an input-output fiber array and a multi-core fiber programmable multifunctional device control drive board, wherein light input by input fibers in the input-output fiber array enters a deflection light window after being collimated by the collimation microlens array, then is reflected by the array MEMS reflector, is coupled into output fibers in the input-output fiber array by the collimation microlens array, and realizes various functions of the multi-core fiber programmable multifunctional device by controlling the multi-core fiber programmable multifunctional device control drive board, such as a multi-core fiber Fan-in/out device function, a multi-core fiber switch, a multi-core fiber core gating function, a multi-core fiber exchanger function and the like.
2. The array MEMS reflector based multi-core fiber programmable multifunctional device of claim 1, wherein: the array MEMS reflector is composed of N (N is an integer larger than 1) reflectors which can rotate in a certain angle along two mutually perpendicular rotating shafts, and each reflector is aligned with the corresponding fiber core and the center of the collimating micro-lens.
3. The array MEMS reflector based multi-core fiber programmable multifunctional device of claim 1, wherein: the rotation angle of each reflector in the array MEMS reflector can be independently controlled by the multicore fiber programmable multifunctional device control driving plate.
4. The array MEMS reflector based multi-core fiber programmable multifunctional device of claim 1, wherein: the multi-core optical fiber programmable multifunctional device control driving board consists of a controller interface and an MEMS driving board, and the MEMS driving board is connected with pins led out from a base of the array MEMS reflector.
5. The array MEMS reflector based multi-core fiber programmable multifunctional device of claim 1, wherein: the collimating micro-lens array is composed of a collimating micro-lens array substrate and collimating micro-lenses on the substrate, each collimating micro-lens corresponds to one optical fiber core, and can collimate light emitted from the optical fiber end into parallel light to be incident on the array MEMS reflector and also can couple the parallel light reflected by the array MEMS reflector into the optical fiber cores.
6. The array MEMS reflector based multi-core fiber programmable multifunctional device of claim 1, wherein: the input and output optical fiber array is composed of an N-core optical fiber positioned in the center of the array, an N-core optical fiber surrounding the N-core optical fiber, a plurality of standard single-mode optical fibers and a hard sleeve, wherein the multi-core optical fiber and the standard single-mode optical fibers are fixed in the hard sleeve.
7. The array MEMS reflector based multi-core fiber programmable multifunctional device of claim 1, wherein: the optical fiber arrangement mode of the input and output optical fiber array can be triangular arrangement or rectangular arrangement or circular arrangement; the section of the hard sleeve can be a circular section or a triangular section or a rectangular section.
8. The array MEMS reflector based multi-core fiber programmable multifunctional device of claim 1, wherein: the multi-core fiber can be a few-core fiber such as a double-core fiber and a three-core fiber, or a multi-core fiber with higher density and more fiber cores such as a 38-core fiber.
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