Hundred nanosecond laser pulse waveform distortion suppression system and method

Abstract

The invention relates to the technical field of laser, in particular to a system and a method for suppressing waveform distortion of a hundred nanosecond laser pulse, which are characterized in that a trigger signal is set as a square wave to amplify laser, the pulse waveform of the amplified output laser is observed, and according to the sharpening degree of the output pulse laser, the waveform distortion of the hundred nanosecond laser pulse is suppressed. Pre-compensating an output waveform by using an arbitrary waveform generator through a tracing point; the acousto-optic modulator is connected with the light source at the same time, pulse laser of a corresponding waveform is obtained after a tracing point trigger signal of the arbitrary waveform generator is received, and finally near-flat-topped pulse output after laser amplification is achieved. According to the invention, the pulse waveform leading edge sharpening problem in the amplification process of the pulse laser is solved, the peak power of the pulse laser is reduced, the optical nonlinear effect of stimulated Brillouin scattering is inhibited, and the narrowing of the laser pulse width is limited.

Description

Technical field [0001] The present invention relates to the field of laser technology, specifically a suppression system and method for 100-nanosecond laser pulse waveform distortion. Background [0002] At present, two methods are mainly used to solve the waveform distortion problem caused by uneven gain in the amplification process of pulsed laser: one is to optimize the self-gain flatness of the design amplifier, and to improve the gain unevenness of the amplifier by changing the type or doping of the optical fiber matrix; the other is to introduce the gain flat technology, which can be divided into static gain flat filter and dynamic gain equalizer. Changing the type or doping of the fiber matrix fundamentally solves the problem of uneven gain, specific good reliability, but it is only suitable for a small range of fixed bands; static gain flat filter is simple and easy, while having low insertion loss, but as with the first method, intelligently achieve the flatness of the ...

AI Technical Summary

Problems solved by technology

Changing the type or doping of the fiber matrix fundamentally solves the problem of uneven gain, and has good reliability, but it is only applicable to a small range of fixed bands; the static gain flattening filter is simple and easy to implement, and has a low Insertion loss, but like the first method, intelligently achieves the flatness of the static gain spectrum, and is seriously inflexible; dynamic gain balancing technologies include all-fiber acousto-optic tunable filters, cascaded liquid crystal optical harmonic equalization, and holographic polymer Various methods such as liquid crystal grating can realize real-time adjustment of multi-channel gain through corresponding control algorithms, which is highly intelligent, but its cost is too high, and it is not suitable for some small and medium-sized products

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