Ring multi-pass laser amplifier

Abstract

The invention discloses an annular multi-range laser amplification device, and the device comprises a beam expander, a soft-edge diaphragm, a first polarization splitting prism, an electro-optic switch, a second polarization splitting prism, a first spatial filter system, a first 45-degree total-reflection mirror, a second 45-degree total-reflection mirror, a first laser amplification module, a third 45-degree total-reflection mirror, a fourth 45-degree total-reflection mirror, a 90-degree quartz rotor, a second spatial filter system, a second laser amplification module, a fifth 45-degree total-reflection mirror, a sixth 45-dgree total-reflection mirror, a third spatial filter system and a two-dimensional adjustable 45-degree total-reflection mirror with the one-dimensional displacement. The first laser amplification module and the second laser amplification module have the same performances. Based on an annular optical path structure and pulse synchronization control, the device achieves the active multi-range amplification, is compact in structure, and is high in efficiency of energy storage and extraction.

Description

technical field [0001] The invention relates to the technical field of solid-state laser amplification, in particular to an annular multi-pass laser amplification device based on active polarization control. Background technique [0002] With the development of solid-state laser technology, it is difficult to achieve laser pulse output with high energy, high power, and high beam quality with a single resonator laser. Therefore, in recent years, a laser amplifier structure laser system (MOPA) has been developed. This system can realize the above requirements and has full-range modulation capabilities in terms of time waveform, pulse width, spectral characteristics, and polarization characteristics. [0003] The existing solid-state laser amplification technology mainly adopts one-way ( figure 1 ),Two-way( figure 2 ), or four-way ( image 3 ) amplification technology, that is, the laser pulse passes through the gain medium once, twice, and four times at the end of the pump...

AI Technical Summary

Problems solved by technology

[0006] In the prior art, a linear cavity amplification technology such as a four-pass amplification system ( image 3 ), it is impossible to effectively avoid the cross-overlapping of laser pulses in the gain medium or optical components in long-pulse amplification (5-25ns), and pulse overlap will cause local peak power to be too high, which will easily cause damage to optical components, which is not conducive to the operation of high-power laser systems

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