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An optical fiber combiner and splitter

A fiber combiner and fiber combining technology, applied in the field of lasers, can solve the problems of violating the development trend of fiber lasers, increasing the complexity of fiber laser wiring and integration, and increasing the number of devices, so as to improve the synthesis efficiency, simplify the layout, The effect of suppressing the rate of temperature rise

Active Publication Date: 2021-08-03
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The inventor has repeatedly studied the existing pump beam combiner-buncher cascade structure, and found that there are two problems: one is that the number of devices used is large, and a total of A beam combiner / cluster not only increases the complexity of fiber laser layout, wiring and integration, but also goes against the development trend of fiber laser miniaturization and light weight.

Method used

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  • An optical fiber combiner and splitter
  • An optical fiber combiner and splitter
  • An optical fiber combiner and splitter

Examples

Experimental program
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Effect test

Embodiment 1

[0028] like Figure 4 As shown, a fiber combiner and splitter, using In terms of application effect, the laser beams in P input fibers 1 are synthesized and then distributed to M output fibers 2, which is equivalent to integrating multiple fiber combiners to reduce the number of optical components .

[0029] Specifically, the optical fiber combiner and splitter are regarded as integrating M type structure fiber combiner, with root input fiber 1, M output fiber 2, by using In the cross-section of the fiber bundle composed of two input fibers, the outer ring can accommodate more fibers than the inner ring. Compared with the original The fiber optic combiner can greatly reduce the equivalent tapering ratio of the optical fiber, improve the combining efficiency, and reduce the loss of optical devices. Among them, , the fiber combiner has P 1 One input fiber and one output fiber.

[0030] In addition, the fiber combiner and splitter have the functions of combining and ...

Embodiment 2

[0034] like Figure 5 As shown, the same parts of this embodiment and Embodiment 1 will not be repeated, and the difference is:

[0035] The number of optical fiber combiners and splitters is set to 2, and the post-stage cascaded fiber bundler of the fiber optic combiner and splitter adopts type structure, the number of input pump fibers of the fiber bundler . Since the optical fiber combiner and splitter integrates M Type structure fiber combiner, with Root input optical fiber, M root output optical fiber, that is to say, the quantity of described output optical fiber and The number of fiber-optic combiners of the type structure is equal. At the same time, P 1 There is no specific requirement, it can be an integer or a non-integer number, that is, the ratio of the number of input optical fibers and output optical fibers of the optical fiber combiner and splitter is not necessarily an integer.

Embodiment 3

[0037] In the current scientific research and industrial lasers commonly used Pump combiner cascade Pump signal Cluster structure as an example (such as image 3 shown), treat the fiber combiner as a combination of 3 A fiber combiner (equivalent to a pump combiner) forms fiber optic combiners and splitters (such as Figure 4 shown), then image 3 The shown structure transforms into Figure 5 In the structure shown, the total number of optical devices is reduced by four. at the same time, Figure 4 Compared to figure 1 and figure 2 , only one more turn of the input fiber is arranged on the cross-section of the input fiber 1, that is, the cross-sectional area of ​​the input fiber 1 is slightly larger than the prior art, but, Figure 4 However, the total number of optical devices is significantly reduced, and at the same time, the synthesis loss and photothermal energy can be effectively reduced.

[0038] set up The beam combiner and splitter also use input fiber...

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Abstract

The invention relates to an optical fiber beam combiner and splitter, which belongs to the technical field of lasers. The optical fiber beam combiner and splitter adopts a type structure, and its application effect is to combine the laser light in the root input fiber and distribute it to the root output fiber , which is equivalent to using a fiber combiner with a single structure, where is the number of input fibers, is the number of output fibers, and its optical structure is an integrated structure, which makes full use of the outer ring on the cross-section of the fiber bundle composed of one input fiber. The characteristic that the ring can accommodate more optical fibers makes the equivalent taper ratio of the optical fibers reduced compared with the optical fiber combiner of the type structure. The invention not only helps to reduce the number of optical devices in the laser, but also simplifies the layout and the The cable arrangement and integration also contribute to the miniaturization and weight reduction of the laser. At the same time, the adoption of the type structure can reduce the taper ratio of the fiber, effectively improve the synthesis efficiency, reduce the heat load, and restrain the temperature rise rate.

Description

technical field [0001] The invention belongs to the technical field of lasers, in particular to an optical fiber combiner and splitter. Background technique [0002] Fiber lasers generally use laser diodes as pump sources. In order to increase the laser power, a pump beam combiner is generally used to synthesize the pump light emitted by multiple laser diodes and inject it into the gain fiber of the fiber laser. For all-fiber lasers, this type of pump combiner is the fiber pump combiner (US 2018 / 0102623 A1), which Type structure - N pump fiber input, 1 fiber output, can directly superimpose the pump light from at most N pump sources into the same fiber, such as figure 1 shown. Optical fiber combiner is an optical fiber device prepared on the basis of fused tapered optical fiber bundles. A bundle of optical fibers is stripped of the coating, then arranged together in a certain way, heated at high temperature to melt, and the optical fiber bundle is stretched at the same t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/28H01S3/094
CPCG02B6/28G02B6/2804H01S3/094042H01S3/094053
Inventor 刘玙吴文杰宋华青黄珊陶汝茂沈本剑李敏冯曦
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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