Large-power 1064 nm near-infrared laser based on wattle structure

Abstract

The invention discloses a large-power 1064 nm near-infrared laser based on a wattle structure. The large-power 1064 nm near-infrared laser based on the wattle structure is characterized in that the large-power 1064 nm near-infrared laser based on the wattle structure comprises a laser crystal, optical lenses placed on both sides of the laser crystal and a semiconductor laser pumping module, a laser resonant cavity forming pump lights into 1064 nm lasers with high beam quality and a modulating component modulating the lasers, wherein the laser crystal is a wafer with the wattle structure, an optical direction of the pump lights is in the wafer, a M-shaped light path is formed by the lasers in the laser. The large-power 1064 nm near-infrared laser based on the wattle structure has the advantages that the first-order hot focus, the stress birefringence and the depolarization effect can be lightened even eliminated through the reasonable M-shaped light path designed and the curvature radius of the cylindrical mirror chosen appropriately, thus the simple wattle laser structure is used so as to obtain better light bean quality and higher output power. A diaphragm is arranged inside the laser resonant cavity and can further improve the light beam quality.

Description

technical field [0001] The invention relates to an all-solid-state laser, in particular to a high-power 1064nm near-infrared laser based on a slab structure. Background technique [0002] The all-solid-state laser pumped by laser diodes has become one of the hotspots in the research of solid-state laser technology due to its high conversion efficiency, good stability, compact structure, and long service life. Among them, the slab laser has high pumping efficiency and heat dissipation Efficiency is good and widely valued. When a high-power solid-state laser using a rod-shaped working medium operates for a long time, the radial temperature gradient of the working medium causes the rod to exhibit thermal lens effect and birefringence effect, which seriously reduces the beam quality and limits the output level and high repetition rate of the laser. rate operation. For solid-state lasers with a slab structure, a reasonable "M"-shaped optical path can be designed to reduce or ev...

AI Technical Summary

Problems solved by technology

However, this scheme has disadvantages such as complex structural design, short absorption length, and low pumping efficiency, which limit its further development.

Most of the existing 1064nm lasers use rod-shaped crystals to obtain 1064nm near-infrared laser output. Due to the limited heat load and pump light power that rod-shaped laser crystals can withstand, the high power output of 1064nm near-infrared lasers is directly limited.

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