CN110908040B - Multi-core optical fiber multiplexing and demultiplexing device and method based on reflector - Google Patents
Multi-core optical fiber multiplexing and demultiplexing device and method based on reflector Download PDFInfo
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Abstract
The invention belongs to the technical field of optical communication, and discloses a multi-core optical fiber multiplexing and demultiplexing device and method based on a reflector, which comprises a lens, a reflector component and an optical fiber collimator component, wherein outgoing beams of a multi-core optical fiber are expanded and collimated through the lens, the propagation direction of the beams is changed through the reflector component, the distances among the outgoing beams of different fiber cores of the multi-core optical fiber are pulled apart, the outgoing beams from the different fiber cores of the multi-core optical fiber are respectively received through a plurality of single-core optical fiber collimators included in the optical fiber collimator component and are coupled to the plurality of single-core optical fibers, and the space division demultiplexing function is realized; after the emergent light beams of the single-core optical fibers respectively pass through the corresponding single-core optical fiber collimators, the transmission direction of the light beams is changed through the reflector assembly, and the light beams are focused through the lens and coupled to the multi-core optical fibers, so that the space division multiplexing function is realized. The invention solves the problem of higher cost of space division multiplexing/demultiplexing coupling packaging in the prior art.
Description
Technical Field
The invention relates to the technical field of optical communication, in particular to a multi-core optical fiber multiplexing and demultiplexing device and method based on a reflector.
Background
At present, the communication capacity of a single-core optical fiber is approaching to the theoretical nonlinear shannon limit more and more, and in the face of the coming crisis of the optical fiber transmission capacity, a space division multiplexing technology for signal transmission by adopting a multi-core optical fiber becomes a research hotspot.
The space division multiplexer/demultiplexer is a key optical device in the space division multiplexing technology, and is used for coupling optical signals in a single-core optical fiber into each fiber core of a multi-core optical fiber and performing space division demultiplexing on the signals in the multi-core optical fiber to the corresponding single-core optical fiber after transmission.
Currently, common space division multiplexing/demultiplexing methods include a tapering method, a lens coupling method, an optical fiber bundle method, and a polymer waveguide coupling method. The fusion tapering method is that single-core optical fiber is inserted into a customized capillary, then tapered until the core spacing is equal to the core spacing of the multi-core optical fiber, and then cut off, and finally fusion-jointed with the multi-core optical fiber. The lens coupling method is to expand the light in each fiber core of the multi-core optical fiber by using a focusing lens, change the light path by using a diamond prism, and finally focus each light beam to the single-core optical fiber by using a collimator in front of the single-core optical fiber. The corrosion optical fiber bundle method is characterized in that a single-core optical fiber cladding is corroded to the size of the distance between the cores of the multi-core optical fibers, then the single-core optical fibers are inserted into a capillary according to the arrangement shape of the cores of the multi-core optical fibers, the capillary is inserted into an adhesive solution, the adhesive is sucked into a capillary gap by utilizing a siphon effect to fix the corrosion optical fibers, and then the prepared corrosion optical fiber bundle is welded with the multi-core optical fibers. The femtosecond laser direct writing technology creates a waveguide structure for restraining a light field by changing the refractive index distribution of a writing area in a polymer.
These methods each have their drawbacks, the bundle fiber method is difficult to control in its parameters; the tapering method has the defects of difficult parameter control and complex process; the polymer waveguide method has complex process and large loss; the lens coupling method has difficulties in expansion and integration.
The methods have the problems of high coupling and packaging cost and incapability of large-scale popularization and application.
Disclosure of Invention
The embodiment of the application provides a device and a method for multiplexing and demultiplexing multi-core optical fiber based on a reflector, and solves the problem that the coupling and packaging cost of space division multiplexing/demultiplexing in the prior art is high.
The embodiment of the application provides a multi-core fiber multiplexing and demultiplexing device based on a reflector, which comprises: a lens, a reflector assembly, a fiber collimator assembly;
the mirror assembly is positioned on the light path between the lens and the fiber collimator assembly; the optical fiber collimator assembly comprises a plurality of single-core optical fiber collimators, and the number of the single-core optical fiber collimators is the same as that of the fiber cores of the multi-core optical fiber; each single-core optical fiber collimator is in coupling alignment with a single-core optical fiber;
when the space division demultiplexing function is realized, the lens is used for expanding and collimating the emergent light beam of the multi-core optical fiber; the reflector assembly is used for changing the propagation direction of the light beams and pulling away the distance between the emergent light beams of different fiber cores of the multi-core optical fiber; the plurality of single-core optical fiber collimators are used for respectively receiving emergent light beams from different fiber cores of the multi-core optical fiber and are coupled to the plurality of single-core optical fibers;
when the space division multiplexing function is realized, the plurality of single-core optical fiber collimators are used for respectively receiving emergent light beams from the plurality of single-core optical fibers and transmitting the emergent light beams to the reflector assembly; the reflector assembly is used for changing the propagation direction of the light beams and shortening the distance between the emergent light beams; the lens is used for focusing the emergent light beam and is coupled to the multi-core optical fiber.
Preferably, the mirror assembly comprises: a first mirror array;
the first mirror array comprises a plurality of mirrors, and the number of the mirrors is the same as the number of the cores of the multi-core optical fiber.
Preferably, the mirror assembly comprises: a first mirror array, a second mirror array;
the number of the reflectors in the first reflector array is the same as the number of the fiber cores of the multi-core optical fiber, and the number of the reflectors in the second reflector array is the same as the number of the fiber cores of the multi-core optical fiber;
when the space division demultiplexing function is realized, the first mirror array is used for reflecting the light beams to the second mirror array, the second mirror array is used for reflecting the light beams to the optical fiber collimator assembly, the first mirror array and the second mirror array are orthogonal, and the first mirror array and the second mirror array perform light beam separation in two directions perpendicular to each other.
Preferably, the lens is a convex lens, and the entrance and exit end surfaces of the multicore fiber are located at a focal plane of the convex lens.
Preferably, the reflector is a plane reflector or a prism.
Preferably, the plurality of mirrors in the first mirror array have different distances from the lens, the distances between adjacent mirrors are the same, and an included angle between a reflecting surface of a mirror and an emergent light beam is 45 °.
Preferably, the first mirror array is a ladder-shaped array of mirrors, and the second mirror array is a ladder-shaped array of mirrors.
The embodiment of the application provides a multi-core optical fiber multiplexing and demultiplexing method based on a reflector, wherein emergent light beams of the multi-core optical fiber are expanded and collimated through a lens, the propagation direction of the light beams is changed through a reflector component, the distances between the emergent light beams of different fiber cores of the multi-core optical fiber are pulled apart, a plurality of single-core optical fiber collimators included by an optical fiber collimator component respectively receive the emergent light beams of different fiber cores of the multi-core optical fiber and are coupled to the plurality of single-core optical fibers, and the space division demultiplexing function is realized;
the emergent light beams of a plurality of single-core optical fibers respectively pass through a plurality of corresponding single-core optical fiber collimators, then pass through the reflecting mirror assembly to change the propagation direction of the light beams, and are focused through the lens and coupled to the multi-core optical fibers, so that the space division multiplexing function is realized.
Preferably, when the space division demultiplexing function is realized, the outgoing light beam is dispersed by the first mirror array in the mirror assembly.
Preferably, when the space division demultiplexing function is realized, the emergent light beam is dispersed for the first time in the first direction through the first mirror array in the mirror assembly, and the light beam is reflected to the second mirror array in the mirror assembly; and the emergent light beam is dispersed for the second time in the second direction through the second reflector array, and the light beam is reflected to the optical fiber collimator assembly.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
in the embodiment of the application, the outgoing beams of the multi-core fiber are expanded and collimated through the lens, the propagation direction of the beams is changed through the reflector assembly, the distances between the outgoing beams of different fiber cores of the multi-core fiber are separated, the outgoing beams of different fiber cores of the multi-core fiber are respectively received through a plurality of single-core fiber collimators included by the fiber collimator assembly and are coupled to the plurality of single-core fibers, and the space division demultiplexing function is realized; after the emergent light beams of the single-core optical fibers respectively pass through the corresponding single-core optical fiber collimators, the transmission direction of the light beams is changed through the reflector assembly, and the light beams are focused through the lens and coupled to the multi-core optical fibers, so that the space division multiplexing function is realized. The invention only needs simple lens, reflector and common collimator technology, so the invention has simple processing and assembling process and low cost.
Drawings
In order to more clearly illustrate the technical solution in the present embodiment, the drawings needed to be used in the description of the embodiment will be briefly introduced below, and it is obvious that the drawings in the following description are one embodiment of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic diagram of multiplexing/demultiplexing a dual-core optical fiber and a single-core optical fiber;
fig. 2 is a cross-sectional core arrangement diagram of a three-core optical fiber suitable for a device for multiplexing and demultiplexing a multi-core optical fiber based on a mirror according to embodiment 1 of the present invention;
fig. 3 is a schematic diagram of a device for multiplexing and demultiplexing a multi-core optical fiber based on a mirror according to embodiment 1 of the present invention;
FIG. 4 is a cross-sectional core layout of a twelve-core optical fiber suitable for a device for multiplexing and demultiplexing multi-core optical fibers based on mirrors provided in embodiment 2 of the present invention;
fig. 5 is a schematic diagram of a device for multiplexing and demultiplexing a multi-core optical fiber based on a mirror according to embodiment 2 of the present invention;
fig. 6 is a front view of a device for multiplexing and demultiplexing a multi-core optical fiber based on a mirror according to embodiment 2 of the present invention;
fig. 7 is a right side view of a device for multiplexing and demultiplexing a multi-core optical fiber based on a mirror according to embodiment 2 of the present invention.
The optical fiber comprises 1-double-core optical fiber, 2-lens, 3-single-core optical fiber collimator, 4-single-core optical fiber, 5-cladding, 6-fiber core, 7-three-core optical fiber, 8-reflector, 9-twelve-core optical fiber, 10-first reflector array, 11-second reflector array, 12-first fiber core and 13-second fiber core.
Detailed Description
Referring to fig. 1, the distance between adjacent fiber cores (a first fiber core 12 and a second fiber core 13) of a dual-core optical fiber 1 is d, an emergent end surface is arranged on a front focal plane of a lens 2, emergent light beams of the fiber cores are collimated into two parallel light beams by the lens 2, the included angles are theta, and the two parallel light beams are respectively coupled into a single-core optical fiber 4 through a single-core optical fiber collimator 3 after being transmitted for a certain distance. The included angle theta of the parallel beams satisfies the following formula:
wherein d is the distance between adjacent fiber cores of the double-core optical fiber, and f is the focal length of the lens.
However, the multi-core fiber multiplexer/demultiplexer based on the lens and the collimator has a serious disadvantage that the device size is too large because the angle theta is too small. For example, if the core pitch D is 45um, the lens focal length f is 2mm, and θ is calculated to be 0.0225rad, the distance D between adjacent light beams is required to have enough space for collimator adjustment, and if D is 10mm, the distance L between the lens and the fiber collimator is 444mm, and the length of the multiplexer/demultiplexer reaches as much as 0.5 m in addition to the multicore fiber and the collimator, which brings difficulty to the integration and application of the multicore fiber.
In order to solve the problems, the invention provides a device and a method for multiplexing and demultiplexing a multi-core optical fiber based on a reflector, which are used for coupling the multi-core optical fiber with a single-core optical fiber.
The invention provides a multi-core fiber multiplexing and demultiplexing device based on a reflector, which comprises: lens, mirror assembly, fiber collimator assembly. The mirror assembly is positioned on the light path between the lens and the fiber collimator assembly; the optical fiber collimator assembly comprises a plurality of single-core optical fiber collimators, and the number of the single-core optical fiber collimators is the same as that of the fiber cores of the multi-core optical fiber; each single-core optical fiber collimator is in coupling alignment with a single-core optical fiber.
When the space division demultiplexing function is realized, the lens is used for expanding and collimating the emergent light beam of the multi-core optical fiber; the reflector assembly is used for changing the propagation direction of the light beams and pulling away the distance between the emergent light beams of different fiber cores of the multi-core optical fiber; the plurality of single-core optical fiber collimators are used for respectively receiving emergent light beams from different fiber cores of the multi-core optical fiber and are coupled to the plurality of single-core optical fibers.
When the space division multiplexing function is realized, the plurality of single-core optical fiber collimators are used for respectively receiving emergent light beams from the plurality of single-core optical fibers and transmitting the emergent light beams to the reflector assembly; the reflector assembly is used for changing the propagation direction of the light beams and shortening the distance between the emergent light beams; the lens is used for focusing the emergent light beam and is coupled to the multi-core optical fiber.
The technical scheme adopted by the invention comprises but is not limited to the following two types: the first scheme is a space division multiplexing/demultiplexing device based on a single group of reflector arrays, and the second scheme is a space division multiplexing/demultiplexing device based on two groups of orthogonal reflector arrays. The first scheme is suitable for the case that the number of the multicore fiber cores is small (generally less than or equal to six), and the second scheme is suitable for the case that the number of the multicore fiber cores is greater than six, which are respectively described below.
The first scheme is as follows: a space division multiplexing/demultiplexing device based on a single mirror array.
The device comprises a lens, a reflector array (marked as a first reflector array) and a group of single-core optical fiber collimators. The reflector is a plane reflector or a prism.
In a preferred scheme, distances from the plurality of reflectors in the first reflector array to the lens are different, distances between adjacent reflectors are the same, and an included angle between a reflection surface of each reflector and an emergent light beam is 45 °.
The lens is a convex lens and is used for expanding and collimating emergent light beams of the multi-core optical fiber; the light incident and emergent end faces of the multi-core optical fiber are located on the focal plane of the convex lens. The first mirror array comprises a plurality of mirrors, and the number of the mirrors is the same as the number of the cores of the multi-core optical fiber; the reflecting mirror can be a plane reflecting mirror or a prism. The first reflector array is used for turning the light path, and the distance of emergent light beams of different fiber cores is pulled away in the light propagation direction, so that the single-core optical fiber collimator can receive light conveniently. The single-core optical fiber collimator respectively receives emergent light beams of different multi-core optical fiber cores at certain positions away from the reflector, and the emergent light beams are coupled to the single-core optical fiber, so that the space division demultiplexing function is realized.
The optical path is completely reversible, so the technical method provided by the invention can complete the multiplexing/demultiplexing function of the multi-core optical fiber.
Scheme II: a space division multiplexing/demultiplexing device based on two orthogonal mirror arrays.
The device comprises: a lens, a first reflector array, a second reflector array, and a group of single-core fiber collimators. The reflector is a plane reflector or a prism.
In a specific structure, the first mirror array is a ladder-shaped arrangement of mirrors, and the second mirror array is a ladder-shaped arrangement of mirrors.
The exit end face of the multi-core optical fiber is positioned on the focal plane of the lens; the lens is a convex lens, and different emergent light from the multi-core optical fiber is collimated into parallel beams with a certain included angle. The number of the reflectors in the first reflector array is the same as the number of the fiber cores of the multi-core optical fiber, an included angle between the reflecting surface of each reflector and the parallel light beams is about 45 degrees, the first reflector array is used for reflecting the light beams to the second reflector array perpendicular to the propagation direction, and the first separation of the parallel light beams is realized in the propagation direction of the light. The number of the reflectors in the second reflector array is the same as the number of the fiber cores of the multi-core optical fiber, and the second reflector array is used for reflecting the light beams to the optical fiber collimator assembly and realizing the second separation of the parallel light beams in the direction perpendicular to the light propagation direction. I.e. the first mirror array and the second mirror array are orthogonal, the first mirror array and the second mirror array performing a splitting of the light beam in two directions perpendicular to each other. The single-core optical fiber collimator respectively receives emergent light beams of different multi-core optical fiber cores at certain positions away from the reflector, and the emergent light beams are coupled to the single-core optical fiber, so that the space division demultiplexing function is realized.
The optical path is completely reversible, so the technical method provided by the invention can complete the multiplexing/demultiplexing function of the multi-core optical fiber.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Example 1
The first embodiment of the present invention will be described in further detail with reference to fig. 2 and 3 and embodiment 1.
The cross section of the three-core optical fiber used in example 1 is shown in fig. 2, and includes a cladding 5 and a core 6, the diameter of the core 6 is R, and the distance between adjacent cores is d.
Referring to fig. 3, embodiment 1 provides a device for multiplexing and demultiplexing a multi-core optical fiber based on a mirror, which includes a lens 2, three mirrors 8 and three single-core optical fiber collimators 3.
The emergent end face of the three-core optical fiber 7 is positioned on the object focal plane of the lens 2, emergent light beams of different fiber cores of the three-core optical fiber are collimated by the lens 2 to form three parallel light beams with certain included angles, the parallel light beams are separated after being spread for a certain distance, and are respectively reflected to different single-core optical fiber collimators 3 through three reflectors 8 and finally coupled into the single-core optical fiber 4.
A space rectangular coordinate system is established by taking the center of the lens as an origin, taking a central axis perpendicular to the lens as a Z axis (the emergent light direction of the multi-core fiber is a positive direction) and taking the vertical direction as a Y axis.
The numerical aperture NA of the optical fiber is 0.2, the focal length of the lens is 2mm, the diameter of the collimated parallel light beam is 0.56mm, different parallel light beams at a distance of 50mm from the lens can be separated from each other, in order to facilitate the placement of the reflector array, the reflectors are uniformly placed at a certain interval (the Z-axis coordinate is respectively 140mm, 150mm and 160mm, the XY coordinate is suitable for receiving the parallel light beam) at the left and right of 150mm (the distance between adjacent parallel light beams is 1.7mm) from the lens, the included angle between the reflecting surface of each reflector and the Z-axis is about 45 degrees, the parallel light beam is incident to the collimator array after passing through the reflector array, and the coupling of the three-core optical fiber and the single-core optical fiber.
Since the operation of the mirror array requires a certain space, the first scheme is suitable for the case of the multicore fiber with a small number of cores (less than or equal to 6), and when the number of cores is large, the second scheme is suitable, which is further described in example 2 below.
Example 2
The second embodiment of the present invention will be described in further detail with reference to fig. 4-7 and embodiment 2.
The cross section of the twelve-core optical fiber used in example 2 is shown in fig. 4, and includes a cladding 5 and a core 6, the diameter of the core 6 is R, and the interval between adjacent cores is d.
Referring to fig. 5-7, the device for multiplexing and demultiplexing multi-core optical fiber based on mirrors provided by embodiment 2 comprises a lens 2, two mirror arrays (a first mirror array 10 and a second mirror array 11), and a group of single-core optical fiber collimators 3.
The emergent end surface of the twelve-core optical fiber 9 is positioned on the object focal plane of the lens 2, different fiber core emergent light beams are collimated by the lens 2 to form a plurality of parallel light beams with a certain included angle, the parallel light beams pass through two groups of orthogonal reflector arrays (a first reflector array 10 and a second reflector array 11) and are separated into light spots in two mutually perpendicular directions, and each light spot is coupled into the single-core optical fiber 4 after being independently added with the single-core optical fiber collimator 3.
The numerical aperture NA of the optical fiber is 0.2, the focal length of the lens is 2mm, the first reflector array is arranged in a step shape in four rows at a certain interval from the left side to the right side of the lens 150mm (the distance between adjacent parallel light beams is 1.7mm), the number of the reflectors in the four rows is respectively 2, 4 and 2 (corresponding to fiber core arrangement of 12-core light rays), the Z-axis coordinate is respectively 140mm, 150mm, 160mm and 170mm, the XY coordinate takes the fact that the parallel light beams can be received and other parallel light beams are not shielded as the standard, and the first separation of the parallel light beams is realized in the Z-axis direction. The second reflector array comprises twelve reflectors which are arranged in a step shape, receives the parallel light beams from the first reflector array in the Y-axis direction, enables the twelve parallel light beams to be separated for the second time in the Y-axis direction, and reflects the parallel light beams to the collimator array in the X-axis direction, so that the coupling of the twelve-core optical fibers and the twelve single-core optical fibers is realized.
The invention also provides a multi-core optical fiber multiplexing and demultiplexing method based on the reflector, wherein the outgoing light beams of the multi-core optical fiber are expanded and collimated through the lens, the propagation direction of the light beams is changed through the reflector component, the distances between the outgoing light beams of different fiber cores of the multi-core optical fiber are pulled, the outgoing light beams of different fiber cores of the multi-core optical fiber are respectively received through a plurality of single-core optical fiber collimators included by the optical fiber collimator component and are coupled to the plurality of single-core optical fibers, and the space division demultiplexing function is realized; the emergent light beams of a plurality of single-core optical fibers respectively pass through a plurality of corresponding single-core optical fiber collimators, then pass through the reflecting mirror assembly to change the propagation direction of the light beams, and are focused through the lens and coupled to the multi-core optical fibers, so that the space division multiplexing function is realized.
Specifically, when the device in the first scheme is adopted, and the space division demultiplexing function is realized, the outgoing light beams are dispersed through the first reflector array in the reflector assembly. The optical path is completely reversible, so the technical method provided by the invention can complete the multiplexing function of the multi-core optical fiber. That is, when the space division multiplexing function is implemented, the outgoing beams are shrunk through the first mirror array in the mirror assembly, that is, the distance between the outgoing beams is shortened.
When the device in the second scheme is adopted, when the space division demultiplexing function is realized, the emergent light beam is dispersed for the first time in the first direction through the first reflector array in the reflector component, and the light beam is reflected to the second reflector array in the reflector component; and the emergent light beam is dispersed for the second time in the second direction through the second reflector array, and the light beam is reflected to the optical fiber collimator assembly. The optical path is completely reversible, so the technical method provided by the invention can complete the multiplexing function of the multi-core optical fiber. When the space division multiplexing function is realized, the emergent light beams are contracted in two directions through the first mirror array and the second mirror array in the mirror assembly, namely, the distance between the emergent light beams is shortened twice.
The device and the method for multiplexing and demultiplexing the multi-core optical fiber based on the reflector, provided by the embodiment of the invention, at least comprise the following technical effects:
(1) the invention only needs simple lens, reflector and common collimator technology, so the invention has simple processing and assembling process and low cost.
(2) The device has flexible structure design and easy parameter control, can change along with the change of the number of the fiber cores of the multi-core optical fiber, and is suitable for various fiber core types such as circular, oval, groove-assisted and the like.
(3) The lens and the reflector element can work efficiently in a wider waveband, so the invention has small insertion loss and higher bandwidth, and is particularly suitable for the combination of space division multiplexing and wavelength division multiplexing. The emergent light beams of different fiber cores of the multi-core optical fiber are collimated by the lens and then independently transmitted, so that the crosstalk is small.
(4) The lens and the reflector element can effectively work on incident light in any polarization state, so the invention is insensitive to the polarization state of the emergent light of the optical fiber.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (5)
1. A device for multiplexing and demultiplexing a multi-core optical fiber based on a mirror, comprising: a lens, a reflector assembly, a fiber collimator assembly;
the mirror assembly is positioned on the light path between the lens and the fiber collimator assembly; the optical fiber collimator assembly comprises a plurality of single-core optical fiber collimators, and the number of the single-core optical fiber collimators is the same as that of the fiber cores of the multi-core optical fiber; each single-core optical fiber collimator is in coupling alignment with a single-core optical fiber;
when the space division demultiplexing function is realized, the lens is used for expanding and collimating the emergent light beam of the multi-core optical fiber; the reflector assembly is used for changing the propagation direction of the light beams and pulling away the distance between the emergent light beams of different fiber cores of the multi-core optical fiber; the plurality of single-core optical fiber collimators are used for respectively receiving emergent light beams from different fiber cores of the multi-core optical fiber and are coupled to the plurality of single-core optical fibers;
when the space division multiplexing function is realized, the plurality of single-core optical fiber collimators are used for respectively receiving emergent light beams from the plurality of single-core optical fibers and transmitting the emergent light beams to the reflector assembly; the reflector assembly is used for changing the propagation direction of the light beams and shortening the distance between the emergent light beams; the lens is used for focusing the emergent light beam and is coupled to the multi-core optical fiber;
the mirror assembly includes: a first mirror array, a second mirror array;
the number of the reflectors in the first reflector array is the same as the number of the fiber cores of the multi-core optical fiber, and the number of the reflectors in the second reflector array is the same as the number of the fiber cores of the multi-core optical fiber;
when the space division demultiplexing function is realized, the first mirror array is used for reflecting the light beams to the second mirror array, the second mirror array is used for reflecting the light beams to the optical fiber collimator assembly, the first mirror array and the second mirror array are orthogonal, and the first mirror array and the second mirror array perform light beam separation in two directions perpendicular to each other.
2. The mirror-based apparatus for multiplexing and demultiplexing according to claim 1, wherein said lens is a convex lens, and an entrance and exit end surface of said multicore fiber is located at a focal plane of said convex lens.
3. The device for multiplexing and demultiplexing according to claim 1, wherein said mirror is a plane mirror or a prism.
4. The device according to claim 1, wherein the first mirror array is configured with mirrors arranged in a step-like pattern, and the second mirror array is configured with mirrors arranged in a step-like pattern.
5. A multi-core optical fiber multiplexing and demultiplexing method based on a reflector is characterized in that emergent light beams of a multi-core optical fiber are expanded and collimated through a lens, the propagation direction of the light beams is changed through a reflector component, the distances between emergent light beams of different fiber cores of the multi-core optical fiber are separated, a plurality of single-core optical fiber collimators included in an optical fiber collimator component respectively receive emergent light beams of different fiber cores of the multi-core optical fiber and are coupled to the plurality of single-core optical fibers, and the space division demultiplexing function is realized;
after the emergent light beams of the multiple single-core optical fibers respectively pass through the corresponding multiple single-core optical fiber collimators, the transmission direction of the light beams is changed through the reflector assembly, and the light beams are focused through the lens and coupled to the multiple single-core optical fibers, so that the space division multiplexing function is realized;
when the space division demultiplexing function is realized, the emergent light beam is dispersed for the first time in the first direction through the first mirror array in the mirror assembly, and the light beam is reflected to the second mirror array in the mirror assembly; and the emergent light beam is dispersed for the second time in the second direction through the second reflector array, and the light beam is reflected to the optical fiber collimator assembly.
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| JPH085861A (en) * | 1994-06-23 | 1996-01-12 | Toshiba Corp | Optical multiplexer/demultiplexer |
| US6252719B1 (en) * | 1999-03-19 | 2001-06-26 | Lucent Technologies Inc. | Beam splitter/combiner module |
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| US7058251B2 (en) * | 2002-06-12 | 2006-06-06 | Optical Research Associates | Wavelength selective optical switch |
| JP2008122697A (en) * | 2006-11-13 | 2008-05-29 | Fujitsu Ltd | Wavelength multiplexing/demultiplexing module, reception module, transmission module and manufacturing method |
| CN201364399Y (en) * | 2009-03-10 | 2009-12-16 | 福州高意通讯有限公司 | Optical structure |
| KR101858306B1 (en) * | 2011-06-17 | 2018-05-15 | 스미토모 덴키 고교 가부시키가이샤 | Optical device |
| CN103281153B (en) * | 2013-06-20 | 2016-01-20 | 中央民族大学 | A kind of Reconfigurable Optical Add/drop Multiplexer of the M × N port based on liquid crystal on silicon |
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| DD235507A1 (en) * | 1985-03-18 | 1986-05-07 | Elektroprojekt Anlagenbau Veb | OPTICAL ARRANGEMENT FOR WAVELENGTH MULTIPLEX TRANSMISSION |
| US6870976B2 (en) * | 2001-03-13 | 2005-03-22 | Opnext, Inc. | Filter based multiplexer/demultiplexer component |
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