Direct liquid cooled Nd:YLF thin disk laser with unstable resonator
Direct liquid cooled Nd:YLF thin disk laser with unstable resonator
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具有不稳定谐振腔的直接液冷 Nd:YLF 薄盘激光器
DOI：
10.1117/12.2202959
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Chong Liu
中科院分区：
文献类型：
--
作者：
Z. Ye;Z. Cai;B. Tu;Ke Wang;Q. Gao;Chun Tang;Chong Liu
介绍了一种大口径Nd：YLF薄片激光振荡器，该振荡器以折射率匹配液为冷却剂，在窄缝中流动，直接冷却多个薄片。利用波导实现了泵浦光强分布的高度均匀。采用不同掺杂水平的a切Nd：YLF薄片，获得了最大输出能量为346mJ、重复频率为350 Hz的线偏振激光器，相应的光-光效率为8.7%，斜效率为10%。由于正支共焦非稳腔的存在，水平方向的光束质量β因子估计小于8。据我们所知，直接液冷Nd：YLF薄片非稳腔的报道尚属首次。
A large-aperture Nd:YLF thin disk laser oscillator is demonstrated, in which the refractive index matching liquid is used as the coolant flowing in narrow channels to cool the multiple thin disks directly. A high uniformity of pump intensity distribution is realized by using waveguides. With the a-cut Nd:YLF thin disks at different doping levels, a linearly polarized laser with the maximum output energy of 346 mJ is achieved with the repetition of 350 Hz, corresponding to an optical-optical efficiency of 8.7%, and a slope efficiency of 10%. The beam quality β factor is estimated less than 8 in the horizontal direction due to the positive branch confocal unstable resonator. To the best of our knowledge, it is the first time that the direct-liquid-cooled Nd:YLF thin disk unstable resonator is reported.