High-power fiber laser indication light protection device and implementation method thereof

Abstract

The invention discloses a high-power fiber laser indication light protection device and an implementation method thereof, and belongs to the fiber laser field; the device comprises an indicating lightlaser, optical fiber winding mechanisms and cladding light stripping mechanisms, an optical fiber connected to the indicating light laser is connected with the two sets of optical fiber winding mechanisms and the cladding light stripping mechanisms, the optical fiber winding mechanisms are used for changing the winding diameter of an optical fiber and the bending angle change of the optical fiber, fiber core light in the optical fiber enters a cladding from a fiber core, and the optical fiber winding mechanisms convert the fiber core light into cladding light. Reverse fiber core light and cladding light of the high-power optical fiber laser can be effectively stripped through two cladding light stripping mechanisms and step-by-step stripping, the indication light laser is protected against damage, and attenuation of the intensity of indication light cannot be caused.

Description

technical field [0001] The invention relates to the technical field of fiber lasers, in particular to a high-power fiber laser indicating light protection device and an implementation method thereof. Background technique [0002] High-power lasers are widely used in industrial processing and other fields due to their advantages such as good beam quality, high continuous power, good stability, small size, and easy movement. [0003] In high-power fiber lasers, forward and reverse bidirectional pumping is usually used. Due to the influence of the structure of the resonant cavity and the nonlinear effect in the cavity, the reverse signal light is very strong, and the power can reach tens or even hundreds of watts. The reverse signal light will cause damage to the indicator light device and destroy the use of the indicator light. Therefore, a reasonably designed and compact indicator light protection device is very important for high-power fiber lasers. [0004] At present, op...

AI Technical Summary

Problems solved by technology

However, fiber optic circulators cannot isolate pump light and signal light of different wavelengths at the same time.

The dichroic mirror is due to the introduction of a spatial structure, which makes the system less stable than the all-fiber structure. The indicator light protection device with the all-fiber structure has a simple structure and high stability, but it is difficult to strip the reverse core light at present, and cannot Effectively strips opposite core and cladding light

[0005] Therefore, the existing fiber laser indicator light protection device cannot simultaneously strip the reverse fiber core signal light and cladding signal light at the same time, and has a complex structure and high cost, which is not suitable for mass production of high-power fiber lasers.

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