Low-threshold operation of a 355-nm pumped nanosecond β-BaB2O4 optical parametric oscillator
Low-threshold operation of a 355-nm pumped nanosecond β-BaB2O4 optical parametric oscillator
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DOI：
10.1016/j.optlastec.2007.11.009
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发表时间：
2008-09
影响因子：
5
通讯作者：
R. Bapna;C. S. Rao;K. Dasgupta
中科院分区：
文献类型：
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作者：
R. Bapna;C. S. Rao;K. Dasgupta
我们报告了由 Q 开关 Nd:YAG 激光器的三次谐波泵浦的纳秒 β-BaB2O4 光参量振荡器 (OPO) 的低阈值操作。使用泵浦光束的柱面聚焦，在560nm的信号波长处获得〜0.5mJ的阈值脉冲能量，这比球面聚焦配置低约16倍。通过传统 OPO 模型的简单扩展，讨论了紧密聚焦 OPO 设计中衍射损耗的重要性。
We report the low-threshold operation of a nanosecond β-BaB2O4optical parametric oscillator (OPO) pumped by the third harmonic of a Q-switched Nd:YAG laser. Using cylindrical focusing of the pump beam, a threshold pulse energy of ∼0.5mJ is obtained at the signal wavelength of 560nm, which is about sixteen times lower than that of a spherical focusing configuration. The importance of diffraction loss in the design of tightly focused OPOs is discussed in terms of a simple extension of the conventional OPO model.