Optical fiber guide type high-power optical fiber cladding light stripper for deep stripping

Abstract

The invention discloses a deep-stripping optical fiber guide type high-power optical fiber cladding light stripper. A novel method of guiding leakage through a plurality of optical waveguides is employed, so that most leaked cladding light is not accumulated on a double-cladding transmission optical fiber any more, but is transmitted to any place through the optical fiber for sufficient heat dissipation and dissipation. The stripping depth of the cladding light stripper is controlled through the diameter of the optical fiber cone at the output end of the cladding light stripper and the diameter of the leakage light guide optical fiber, residual pump light in the cladding optical fiber can be filtered out, and a high-order laser mode in the cladding optical fiber can also be filtered out. The light stripper can be suitable for higher bearing power, waste light can be guided to any place through the optical fiber, and thermal management design is more convenient; meanwhile, the problem of high temperature of the double-clad optical fiber in the traditional stripper is avoided, so high-power laser transmission in the fiber core and cladding light stripping in the cladding are safer and more reliable.

Description

technical field [0001] The invention belongs to the technical field of fiber lasers, especially the field of high-power fiber lasers or high-power fiber laser amplifiers, and specifically aims at high-efficiency and high-power stripping of high-order mode lasers and residual cladding pumping light in double-clad transmission fibers of high-power fiber lasers. Eliminate (filter, leak), improve the beam quality of the laser output laser. Background technique [0002] With the continuous improvement of the output power level of single-fiber single-mode high-power fiber lasers and the improvement of application requirements for beam quality, the core laser power of high-power fiber lasers is getting higher and higher. At the same time, the cladding stripping power is getting higher and higher. Therefore, the power carrying capacity of the high-power cladding optical stripper is also greatly challenged. [0003] At present, the residual cladding light and high-order mode filteri...

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Problems solved by technology

[0004] However, at present, this type of optical fiber cladding light stripper has the problem of high temperature and difficulty in heat dissipation; and when the fiber core carries high-power fiber laser and cladding light filtering is carried out simultaneously, there is a great risk; the power carrying level is also limited. It is difficult to cope with hundreds of thousands of watts of single-mode single-fiber fiber lasers, and new solutions are urgently needed

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