Computer simulation of thermal focal length of laser crystal and thermally-near-unstable resonator

A simple method determining the thermal focal length of gain medium was investigated. Then by using computer simulation results, a novel configuration was proposed. In the new configuration, the gain medium acts as a mode limiter at maximal pump power, which restrains resonance of high-order modes and guarantees not only high output power but also high beam quality. An LD side-pumped Nd:YAG laser with output power of 400W at 1064nm was obtained experimentally with the new configuration. The experimental results are in agreement with theoretical predictions

Computer simulation of thermal focal length of laser crystal and thermally-near-unstable resonator

A simple method determining the thermal focal length of gain medium was investigated. Then by using computer simulation results, a novel configuration was proposed. In the new configuration, the gain medium acts as a mode limiter at maximal pump power, which restrains resonance of high-order modes and guarantees not only high output power but also high beam quality. An LD side-pumped Nd:YAG laser with output power of 400W at 1064nm was obtained experimentally with the new configuration. The experimental results are in agreement with theoretical predictions

Progress of research on all - solid - state green laser

本文对比了世界范围内对全固态绿光激光器的相关研究, 标定了目前所达到的研究水平, 对于即将开展相关研究的科研工作者是一份有益的参考. 目前, 有必要解决将全固态绿光激光器进行实际应用上的技术难题, 促使其进入产业化的高速发展

All-solid-state extracavity double-frequency laser for 355 nm UV source

为保证高输出功率前提下获得高光束质量的1064和532 nm激光共向输出,实验中,首先采用主振荡功率放大器系统有效地控制基频光束质量,获得平均功率为70 W、重复频率为10 kHz、脉宽为60 ns和光束质量因子M2约为3.9的1064 nm基频激光;接着利用二级放大器,获得平均功率为182.9 W,脉宽为80 ns的1064nm激光。然后,采用KTP晶体腔外倍频技术保证了基频和倍频激光同时、共向输出,最终获得了平均功率为65.7 W、脉宽约为60 ns的532 nm绿光,相应的倍频效率为35.9%。通过有效措施,绿光的光束质量因子M2约控制在6,为开展355 nm紫外激光研究奠定了良好的基础

High beam quality 400W practical all-solid-state laser for laser beam texture

A high-average-power and high-beam-quality diode-side-pumped solid-state laser was designed carefully for laser beam texture. By using of low concentration Nd:YAG crystals with thermally near-unstable resonator design and two-rod birefringence compensation technology, the 1064 nm cw output power of 400 W at pump power of 1170 W was achieved with the beam quality factor M 2 ∼ 15, corresponding to an optical-to-optical conversion efficiency of 34.2%. © 2010 Copyright SPIE - The International Society for Optical Engineering