Optical fiber beam combining and splitting device

Abstract

The invention relates to an optical fiber beam combining and splitting device, and belongs to the technical field of lasers, the optical fiber beam combining and splitting device adopts a type structure, and the application effect of the optical fiber beam combining and splitting device is that lasers in root input optical fibers are combined and then distributed into root output optical fibers, which is equivalent to the use of an individual type structure optical fiber beam combiner, wherein MxP1=P is the number of the input optical fibers and M>=2 is the number of the output optical fibers. The optical structure is an integrated structure, the characteristic that the outer ring can accommodate more optical fibers than the inner ring on the cross section of the optical fiber bundle formed by the root input optical fibers is fully utilized, and the equivalent tapering ratio of the optical fibers is reduced compared with that of a structural optical fiber beam combiner. According to the invention, the number of optical devices in the laser can be reduced, layout, wiring and integration of the laser are simplified, miniaturization and light weight of the laser are facilitated, and by adopting the type structure, the tapering ratio of the optical fiber can be reduced, the synthesis efficiency can be effectively improved, the thermal load can be reduced, and the temperature rise rate can be inhibited.

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...

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.

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