A azimuthally polarized laser pulse was produced from a passively Q-switched rotating Nd:YAG disk laser with a Cr⁴⁺:YAG crystal as the saturable absorber and a uniaxial YVO₄ crystal as the polarization selection. The averaged laser power reached 5.04W with a slope efficiency of 40%. The laser pulse had a maximum peak power of 4.3kW, minimum pulse duration of 31.07ns, and a 37.3kHz repetition rate at absorbed pump power 15.93W. The polarization degree of the azimuthally polarized beam was measured to be about 97.3%. Such an azimuthally polarized laser pulse is important to numerous applications.

中文翻译：

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被动调Q旋转Nd：YAG圆盘激光器的脉冲方位角偏振光束

由无源调Q旋转Nd：YAG盘形激光器产生方位角偏振激光脉冲，其中Cr ⁴⁺：YAG晶体为可饱和吸收体，单轴YVO ₄晶体为偏振选择。平均激光功率达到5.04W，斜率效率为40％。在吸收的泵浦功率为15.93W时，激光脉冲的最大峰值功率为4.3kW，最小脉冲持续时间为31.07ns，重复频率为37.3kHz。测得的方位偏振光束的偏振度约为97.3％。这种方位偏振的激光脉冲对许多应用都是重要的。