Picosecond laser system with self-injection frequency stabilization and pulse amplification functions

Abstract

The invention relates to a picosecond laser system with self-injection frequency stabilization and pulse amplification functions. The picosecond laser system comprises a pumping device, a dichroic mirror and a microchip laser, wherein the pumping device is composed of a first pump light source, a first lens, a second lens and an optical fiber; a coupling output mirror, a laser gain medium and a semiconductor saturable absorber are sequentially glued, and the semiconductor saturable absorber is welded to a heat sink, so that the microchip laser can be formed; the picosecond laser system further comprises a self-injection external cavity structure and a pulse amplifying structure; the self-injection external cavity structure is composed of a third lens, a first polarization beam splitting cube, a half-wave plate, a second polarization beam splitting cube, a film polarizer, a first Pockels cell, a first high-reflectivity mirror, a second Pockels cell, a second high-reflectivity mirror and a third high-reflectivity mirror; and the pulse amplifying structure is composed of a pumping device and an amplification gain medium, wherein the pumping device is composed of a fourth lens, a fifth lens, an optical fiber and a second pump light source. With the system adopted, time jitter can be decreased, the synchronous amplification of the output power of the laser can be realized.

Description

technical field [0001] The invention belongs to the field of picosecond lasers, in particular to a picosecond laser system with functions of self-injection frequency stabilization and pulse amplification. Background technique [0002] With the wide application of picosecond lasers in various fields, picosecond laser technology has developed rapidly. In addition to its applications in material precision processing, solar cell preparation, and biomedicine, picosecond pulsed lasers can also effectively improve the measurement accuracy of ranging, wind, and speed lidars. Mode-locking technology is the main method for generating picosecond lasers, which has the advantages of good output laser beam quality, high pulse energy stability, and small time jitter. However, mode-locked lasers have disadvantages such as difficult calibration of the optical path, susceptibility to external interference during the mode-locking process, repetition rate determined by cavity length, and gener...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a picosecond laser system with self-injection frequency stabilization and pulse amplification functions in view of the deficiencies in the prior art, which can solve the problems of unstable pulse output power and large time jitter of microchip picosecond lasers. problem, provide picosecond laser output with adjustable repetition rate and low time jitter, and can realize synchronous amplification of laser output power

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