中国激光, 2010, 37 (10): 2451, 网络出版: 2010-09-25   

基于热致双焦点选模的径向、切向偏振激光器

Radially or Azimuthally Polarized Laser Based on Mode Selection of Thermally Induced Bifocus
作者单位
中国工程物理研究院应用电子学研究所, 四川 绵阳 621900
摘要
侧抽运NdYAG棒对径向偏振光和切向偏振光具有不同的热焦距,利用He-Ne激光器输出的线偏振光和旋转狭缝测量NdYAG棒的径向、切向热焦距,设计谐振腔使得只有一种偏振光能低损耗稳定振荡。在440 W抽运功率下,获得31.7 W径向偏振激光,光束质量因子M2约为2.5,调整腔长后,在470 W抽运功率下,获得30.2 W切向偏振激光,光束质量因子M2约为2.8。实验结果表明,利用热致双焦点选模可以获得较大功率的径向、切向偏振激光输出,但激光器对抽运功率敏感。
Abstract
Side-pumped NdYAG rods have different radial and azimuthal thermal focal lengths. Radial and azimuthal thermal focal length are measured with rotary slit and polarized He-Ne laser. A laser oscillator is designed to produce low-loss stable oscillation in a single polarization. At the pumped power of 440 W, radially polarized beam at 31.7 W with M2=2.5 is achieved. And at the pumped power of 470 W, azimuthally polarized beam at 30.2 W with M2=2.8 is achieved. The results show that radially or azimuthally polarized beam with higher power can be achieved with mode selection of thermally induced bifocus, but the laser is sensitive to pumped power.
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于益, 庞毓, 孙殷宏, 王卫民, 高清松. 基于热致双焦点选模的径向、切向偏振激光器[J]. 中国激光, 2010, 37(10): 2451. Yu Yi, Pang Yu, Sun Yinhong, Wang Weimin, Gao Qingsong. Radially or Azimuthally Polarized Laser Based on Mode Selection of Thermally Induced Bifocus[J]. Chinese Journal of Lasers, 2010, 37(10): 2451.

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