相位板
光学
激光器
双折射
材料科学
极化(电化学)
Q开关
纳秒
物理
化学
物理化学
作者
Matthew J. Barber,P. C. Shardlow,Yuhao Lei,Peter G. Kazansky,W.A. Clarkson
出处
期刊:Optics Letters
[The Optical Society]
日期:2022-08-29
卷期号:47 (17): 4508-4508
被引量:2
摘要
Nanosecond Q switched pulses and radial polarization are established stand-alone techniques for enhanced laser materials processing applications, but are generally challenging to achieve simultaneously at high average power levels. Here, we demonstrate a 20.6 W radially polarized Ho:YAG rod laser which has been actively Q switched in order to generate 515 μ J, 210 ns pulses at 2097 nm. By utilizing an ultra-low-loss spatially variant birefringent wave plate (S-waveplate) inside the laser cavity, the linearly polarized fundamental mode has been converted to a radially polarized donut-shaped beam with very high conversion efficiency.
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