High-power fiber laser safety monitoring method and device

Abstract

A high-power fiber laser safety monitoring method comprises the following steps of: S1, establishing a monitoring channel for monitoring an output terminal and the light returning terminal of a forward combiner (usually the suspending arm of the combiner); S2, establishing a monitoring system that comprises a red light indicating part, a spectrum monitoring part, a waveform monitoring part, a thermal imager monitoring part and a power meter monitoring part; and S3 establishing a monitoring index for establishing the indexes of a fiber laser in normal operation, the indexes including a static index and a dynamic index.

Description

technical field [0001] The invention relates to the technical field of fiber laser monitoring, in particular to a high-power fiber laser safety monitoring method and device. Background technique [0002] There are two main methods for safety monitoring of the working status of high-power fiber lasers, one is to monitor the power abnormality through a power meter, and the other is to observe the surface temperature of the fiber and its components through a thermal imager. Or combine the two methods to judge whether there is any abnormality in the working state of the fiber laser. However, in many cases, the active optical fiber is buried in a water-cooled tank and is surrounded by thermally conductive silicone grease. In addition, optical fiber devices such as gratings, beam combiners, or CPS have packaging structures. These factors lead to their internal The temperature is difficult to observe, and the abnormality of the surface temperature cannot be predicted in advance. A...

AI Technical Summary

Problems solved by technology

However, in many cases, the active optical fiber is buried in a water-cooled tank and is surrounded by thermally conductive silicone grease. In addition, optical fiber devices such as gratings, beam combiners, or CPS have packaging structures. These factors lead to their internal The temperature is difficult to observe, and the abnormality of the surface temperature cannot be predicted in advance. At this time, the thermal imager is powerless

Except for a few cases where the abnormality of the laser can be reflected by abnormal power, in most cases the laser collapses suddenly, there will be no symptoms in terms of power, and the power meter cannot accurately reflect slight fluctuations in power

Therefore, it is difficult to comprehensively monitor the working status of the laser simply by means of a power meter and a thermal imager.

Images