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Unstable Cr:LiSAF laser resonator with a variable reflectivity output coupler

机译:具有可变反射率输出耦合器的Cr:LiSAF不稳定激光谐振器

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摘要

The performance of a flash-lamp-pumped Cr:LiSAF unstable laser resonator utilizing a fourth-order super-Gaussian variable reflectivity mirror as an output coupler is described. The super-Gaussian mirror results in a smooth, flattop transverse beam profile in the near field that is advantageous for nonlinear frequency-conversion applications. Long-pulse and Q-switched operation of the Cr:LiSAF unstable laser resonator are described and compared with stable resonator operation. We obtained tunable ultraviolet radiation extending from 267 to 290 nm by frequency mixing the Q-switched Ct:LiSAF laser output with lithium triborate and β-barium borate nonlinear crystals.
机译:描述了使用四阶超高斯可变反射率镜作为输出耦合器的闪光灯泵浦的Cr:LiSAF不稳定激光谐振器的性能。超级高斯镜在近场中产生平滑的平顶横光束轮廓,这对于非线性频率转换应用是有利的。描述了Cr:LiSAF不稳定激光谐振器的长脉冲和Q开关操作,并将其与稳定谐振器操作进行了比较。通过将Q开关Ct:LiSAF激光输出与三硼酸锂和β-硼酸钡非线性晶体频率混合,我们获得了从267到290 nm的可调紫外线辐射。

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