Fiber laser health monitoring method

Abstract

The invention relates to a fiber laser health monitoring method. The method comprises an optical fiber laser data acquisition method and optical fiber laser operation model establishment, and judges the fault reason of an optical fiber laser by comparing the acquired data and the operation model with the actual working state of the optical fiber laser. Measurement data with high linear correlation are collected, analyzed and processed, main changes of measurement variables can be reflected, and noise and interference in the monitoring process can be reflected through a large amount of data. Data are sampled according to time, the correlation between different parameters can be reflected, and the reason of the fault can be jointly judged. The statistical regularity of the process is estimated through potential information in the time sequence, and the method is simple, easy to implement and convenient to master. According to the invention, whether physical quantities such as temperature, humidity, current, voltage and the like of the fiber laser fail or not can be comprehensively monitored, full-automatic laser monitoring can be realized, and reasons for failure of the fiber laser can be judged.

Description

technical field [0001] The invention belongs to the technical field of real-time health monitoring systems for lasers, and in particular relates to real-time health monitoring systems and methods with structures such as fiber lasers, water coolers, and control modules. Background technique [0002] The optical fiber amplifier developed by using optical fiber doped with rare earth elements has brought revolutionary changes to the field of light wave technology. Because the fiber core in the fiber laser is very thin, it is easy to form a high power density in the fiber under the action of the pump light, resulting in the inversion of the number of laser energy level particles of the laser working material. Therefore, the laser oscillation can be formed by properly adding a positive feedback loop to form a resonant cavity. Fiber laser is an efficient wavelength converter, which converts the pump laser wavelength to the lasing wavelength of doped rare earth ions. Just because ...

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Problems solved by technology

The disadvantage of this method is that it can only judge the state of the optical sensor module through the read level, and then judge whether the optical path is abnormal, and cannot judge the specific cause of the abnormal optical path, and can only monitor the failure of no light, and cannot monitor Abnormal conditions of optical power decrease and increase, unable to monitor abnormal conditions of physical quantities such as temperature and humidity

The disadvantage of this method is that it can only monitor the breakage of the optical fiber, but cannot monitor whether the fiber laser circuit, temperature, and humidity are normal.

The disadvantage of this method is that it is necessary to emit light through a visible light laser to measure whether there is visible light in each section of optical fiber, and judge whether each section of optical fiber is abnormal according to the monitoring results

The disadvantage of this method is that it can only monitor the faults of the optical fiber communication network, but cannot monitor the faults of the fiber laser power supply and optical path, and cannot monitor whether the physical quantities such as temperature and humidity are normal.

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