All-solid-state picosecond laser amplifier

Abstract

The invention relates to the technical field of all-solid-state solid laser, in particular to an all-solid-state picosecond laser amplifier. The all-solid-state picosecond layer amplifier comprises a seed source, a seed light guide-in and amplified light guide-out device, a first pumping light source and a regenerating cavity, wherein the seed light guide-in and amplified light guide-out device comprises a first thin-film polarizer, a second thin-film polarizer, a Faraday activizer and a lambda / 2 wave plate, two cavity mirrors of the regenerating cavity comprise a first concave mirror and a second concave mirror, a Pockels cell, a first lambda / 4 wave plate, a third thin-film polarizer, a fourth thin-film polarizer, a third concave mirror, a first convex mirror, a first laser crystal, a second convex mirror and a fourth convex mirror are sequentially arranged in the regenerating cavity along light transmission direction, and the first laser crystal is a Yb:YAG (ytterbium-yttrium aluminum garnet) rod. The first laser crystal doped with Yb ions substitutes for laser crystal doped with Nd ions in the amplifier. The all-solid-state picosecond laser amplifier has the advantages of high quantum efficiency, long upper-energy-level life, low heat output rate, proneness to realizing high-power high-beam-quality laser output.

Description

technical field [0001] The invention relates to the technical field of all-solid-state solid-state lasers, in particular to an all-solid-state picosecond laser amplifier. Background technique [0002] All-solid-state high-repetition-frequency picosecond lasers have broad application prospects in industrial precision processing, satellite laser ranging, precision measurement, frequency conversion, and material interaction. At present, low-power all-solid-state picosecond lasers cannot meet the application requirements. Short pulse amplification technology is needed to amplify low-power picosecond laser pulses to required power picosecond pulses to meet application requirements in various fields. [0003] In the invention patent CN101055401A published on October 17, 2007, a kind of all-solid-state kHz picosecond laser pulse regenerative amplifier is mentioned, which includes the first polarizer, λ / 2 wave plate and Faraday optical rotator. and amplifying light deriving device;...

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Problems solved by technology

However, although the first laser crystal doped with Nd:YAG ions has the advantages of high gain, wide sources, and low price, its severe thermal depolarization effect cannot meet the requirements of high average power and high beam quality.

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