FPGA-based (field programmable gate array-based starting protecting method

Abstract

The invention provides an FPGA-based starting protecting method applied to an MOPA (master oscillator power amplifier) fiber laser system. The method comprises the following steps that, firstly, an FPGA control processing unit inputs seed laser starting signals; secondly, a seed laser driving unit issues a seed laser driving signal when receiving the seed laser starting signal; thirdly, a seed laser unit issues a seed voltage signal when receiving the seed laser driving signals; fourthly, a seed laser side shaping and sampling unit shapes and samples the seed voltage signal; fifthly, the FPGA control processing unit computes the seed voltage signal when receiving the seed voltage signal to obtain a seed voltage signal value and compares the seed voltage signal value with a stored seed voltage signal threshold value; sixthly, at least one substeps are performed.

Description

technical field [0001] The invention relates to a field programmable gate array (PFGA)-based power-on protection method applied in a main oscillation power amplifying (MOPA) fiber laser system. Background technique [0002] Fiber laser refers to a laser that uses a fiber doped with rare earth elements as a gain medium. Under the action of pump light, the energy level particle beam in the fiber is reversed to generate laser output. Fiber lasers have the advantages of high energy, miniaturization, and high flexibility, as well as the advantages of no adjustment, no maintenance, and high stability, which are unmatched by traditional lasers. It is therefore widely used in many industrial fields such as laser engraving, laser cutting, and metal surface treatment. [0003] Among the many types of fiber lasers, the main oscillator power amplifier (MOPA) fiber laser uses a tunable master oscillator as the laser seed source, and drives the semiconductor laser through a programmable ...

AI Technical Summary

Problems solved by technology

[0005] However, there is currently no effective method to monitor and protect the light sources at all levels during the start-up process of the main oscillator power amplified (MOPA) fiber laser system.

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