Multiplexing/demultiplexing device and method based on lens and metasurface lens
A metasurface and demultiplexing technology, applied in the field of optical communication, can solve the problems of space division multiplexing/demultiplexing with large volume, and achieve the effect of compact structure and low cost
Active Publication Date: 2020-08-25
WUHAN UNIV
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[0004] The embodiment of the present application solves the problem of large volume of space division multiplexing / demultiplexing in the prior art by providing a multiplexing / demultiplexing device and method based on a lens and a metasurface lens
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[0037] In order to better understand the above-mentioned technical solution, the above-mentioned technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0038] This embodiment provides a multiplexing / demultiplexing device based on lenses and metasurface lenses, such as figure 1 , figure 2 As shown, it includes: a first lens 3, a second lens; the focal plane of the first lens 3 coincides with an end face of the multi-core optical fiber 1; the second lens includes a substrate 4, a metasurface lens array; The surface lens array is located on one side of the base 4, the metasurface lens array includes a first number of metasurface lenses 5, and the focal plane of the metasurface lens 5 coincides with an end face of the single-core optical fiber array; The single-core optical fiber array includes a second number of single-core optical fibers 6 ; the first number and the second number are the same as...
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The invention belongs to the technical field of optical communication, and discloses a multiplexing / demultiplexing device and method based on a lens and a metasurface lens. When a space division multiplexing function is realized, emergent light of different fiber cores of the multi-core optical fiber is collimated into parallel light beams with different emergent angles through the first lens, andthe plurality of parallel light beams are separated from one another after being spatially propagated for a certain distance, and are respectively focused and coupled to different single-core opticalfibers in the single-core optical fiber array through the second lens. When the space division multiplexing function is realized, different metasurface lenses in the second lens are used for respectively receiving emergent light beams from different single-core optical fibers in the single-core optical fiber array and carrying out beam expansion and collimation on the light beams. After each light beam is independently propagated to the first lens, the light beams are respectively focused and coupled to different fiber cores of the multi-core optical fiber through the first lens. The device solves the problem of large volume of space division multiplexing / demultiplexing in the prior art, and has the advantages of low cost, compact structure and the like.
Description
technical field [0001] The invention relates to the technical field of optical communication, in particular to a multiplexing / demultiplexing device and method based on a lens and a metasurface lens. Background technique [0002] Facing the coming crisis of optical fiber transmission capacity, space division multiplexing technology using multi-core optical fiber for signal transmission has become a research hotspot. The space division multiplexer / demultiplexer is a key optical device in the multi-core optical fiber space division multiplexing technology. Its function is to couple the optical signal in the single-core optical fiber to each core of the multi-core optical fiber, and after transmission Spatial demultiplexing and multiplexing of signals in multi-core fibers into corresponding single-core fibers. [0003] The commonly used space division multiplexing / demultiplexing method is the lens coupling method. This traditional method needs to use multiple fiber collimators,...
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IPC IPC(8): G02B6/32G02B3/00
CPCG02B3/0006G02B6/32
Inventor 郑国兴邓联贵李子乐单欣李仲阳
Owner WUHAN UNIV