A kind of optical path protection method of high-power fiber laser

Abstract

Disclosed is an optical path protection method of a large-power fiber laser. The method comprises arranging a protection circuit which comprises a light source, a sensing fiber, a photo-detector and a circuit control device in a fiber laser. The sensing fiber is distributed along the main optical path of the fiber laser, and the sensing fiber is closely attached to welding points and devices of the fiber laser, which are easily burnt and damaged. When a certain welding point or device is burnt and damaged, local high temperature is caused, the sensing fiber is burnt to be broken, the photo-detector cannot detect optical power, and the circuit control apparatus rapidly cuts off the power supply of the fiber laser or close the pump source of the fiber laser, thus further damage and safety hidden risks which are caused by high power leakage can be effectively blocked.

Description

technical field [0001] The invention belongs to the field of high-power fiber lasers, in particular to an optical path protection method of high-power fiber lasers. Background technique [0002] High-power fiber lasers are widely used in marking and industrial processing. During the working process of high-power fiber lasers, various physical effects can cause damage to optical fibers and optical devices. For example, the quality of fiber fusion is not good, which leads to excessive loss of the fusion point and heat and burns; or the optical nonlinear effect causes local high temperature of the fiber to burn the fiber; the occurrence of the above situations may lead to laser power leakage, causing surrounding optical fibers to be damaged. And optical devices burn out, resulting in greater losses and potential safety hazards. [0003] However, judging from the fiber laser products currently on the market, most fiber laser products do not have corresponding circuit protection...

AI Technical Summary

Problems solved by technology

[0002] High-power fiber lasers are widely used in marking and industrial processing. During the working process of high-power fiber lasers, various physical effects can cause damage to optical fibers and optical devices.

For example, the quality of fiber fusion is not good, which leads to excessive loss of the fusion point and heat and burns; or the optical nonlinear effect causes local high temperature of the fiber to burn the fiber; the occurrence of the above situations may lead to laser power leakage, causing surrounding optical fibers to be damaged. and optical devices burn out, resulting in greater losses and potential safety hazards

[0003] However, judging from the fiber laser products currently on the market, most fiber laser products do not have corresponding circuit protection methods. Once the optical path of the fiber laser generates high temperature locally, its entire optical path will be affected, causing greater losses.

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