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A spatial multiplexer/demultiplexer suitable for multi-core optical fiber and its preparation method

A multi-core optical fiber and spatial multiplexing technology, which is applied in the coupling of optical waveguides, light guides, optics, etc., can solve the problems of large coupling loss, low tolerance, and bulky volume, and achieve low loss, good versatility, and wide application range. wide range of effects

Active Publication Date: 2016-03-02
YANGTZE OPTICAL FIBRE & CABLE CO LTD
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  • Claims
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Problems solved by technology

But this method needs at least 16 lenses for the whole multiplexing / demultiplexing device (multiplexing / demultiplexing requires 2×7=14 lens collimators, and a lens focusing / beam splitting), expensive, and once built, the volume is relatively large
In addition, this method has a large coupling loss, and is less tolerant to external interference, and is more sensitive to vibration and other factors, so it is only suitable for research in the laboratory

Method used

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  • A spatial multiplexer/demultiplexer suitable for multi-core optical fiber and its preparation method
  • A spatial multiplexer/demultiplexer suitable for multi-core optical fiber and its preparation method
  • A spatial multiplexer/demultiplexer suitable for multi-core optical fiber and its preparation method

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Embodiment 1

[0022] Embodiment 1: Spatial multiplexing / demultiplexing device for seven-core optical fiber.

[0023] In the embodiment of the present invention, a seven-core optical fiber with a glass cladding diameter of 150 μm for transmission is selected, a small section is removed to remove the polymer coating, and the glass cladding is etched to 125 μm, and the distance between cores is calculated to be 41 μm.

[0024]Take 7 standard single-mode optical fibers whose core area is the same as the core of the seven-core optical fiber, remove the organic coating at one end, wipe off the debris on the surface of the optical fiber glass cladding with a dust-free paper dipped in alcohol, and clean it The glass cladding parts of the seven single-mode optical fibers were simultaneously immersed in HF (hydrofluoric acid) solution for corrosion. The etching solution is usually HF or hot phosphoric acid, and HF is commonly used. The advantage of HF is that the dissolution rate is fast, and it can...

Embodiment 2

[0026] Embodiment 2: Spatial multiplexing / demultiplexing device for three-core optical fiber.

[0027] In the embodiment of the present invention, a three-core optical fiber with a glass cladding diameter of 125 μm is selected for link transmission, and its core spacing is calculated to be 72 μm.

[0028] Take 3 standard single-mode optical fibers whose core area is the same as the core of the three-core optical fiber, remove the organic coating layer at one end, wipe off the debris on the surface of the optical fiber glass cladding with a dust-free paper dipped in alcohol, and clean it The glass cladding parts of three single-mode optical fibers were simultaneously immersed in HF solution for dissolution. Two concentrations of HF solutions are used for step-by-step dissolution: first, a relatively concentrated solution with a concentration of 35% to 50% is used for rapid dissolution until the residual diameter of the single-mode optical fiber glass cladding is about 10 μm lar...

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Abstract

The invention discloses a spatial multiplexing / demultiplexing device suitable for a multi-core fiber and a manufacturing method of the spatial multiplexing / demultiplexing device. The method comprises the steps that a fiber bundle formed by single mode fibers obtained through chemical corrosion and the multi-core fiber obtained after chemical corrosion are aligned and are connected. The corroded end face of the fiber bundle is connected with the multi-core fiber obtained through chemical corrosion, the non-corroded end face of the fiber bundle is connected with an optical transmitter, the multi-core fiber obtained through chemical corrosion is welded with a non-corroded multi-core fiber, after transmission is carried out for a certain distance, the non-corroded multi-core fiber is connected with the multi-core fiber obtained through chemical corrosion, the other end face of the multi-core fiber obtained through chemical corrosion is connected with the corroded end face of another fiber bundle, and the non-corroded end face of the fiber bundle is connected with an optical receiver. The device and the manufacturing method have general application significance and application prospects in a space division multiplexing system based on the multi-core fiber and a sensing system based on the multi-core fiber, and have the advantages of being flexible in connection, stable, low in inserting consumption, low in crosstalk, high in tolerability to external disturbance and the like.

Description

technical field [0001] The invention belongs to the technical field of multi-core optical fiber signal transmission, and more specifically relates to a space multiplexer / demultiplexer suitable for multi-core optical fiber and a preparation method thereof. Background technique [0002] At present, the scale of the optical communication network is continuously expanding, the capacity is increasing rapidly, and the business is becoming more and more abundant. According to this trend, the existing single-mode optical fiber transmission system will experience a capacity crisis around 2020. In this context, the multi-core optical fiber based on space division multiplexing makes full use of the spatial dimension to increase the transmission capacity of a single single-mode optical fiber, and has become a key technology that can effectively overcome the capacity shrinkage problem caused by the transmission capacity limit of traditional single-mode optical fibers. one. Since the mul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/38
CPCG02B6/245G02B6/26G02B6/38
Inventor 曹蓓蓓韦会峰张心贲李博睿孙程李江刘阳
Owner YANGTZE OPTICAL FIBRE & CABLE CO LTD
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