Passively Q-switched 1.57-µm intracavity optical parametric oscillator
Passively Q-switched 1.57-µm intracavity optical parametric oscillator
复制标题
DOI：
10.1364/ao.38.002554
复制
发表时间：
1999-04
期刊：
影响因子：
1.9
通讯作者：
Y. Yashkir-;H. Driel
中科院分区：
文献类型：
--
作者：
Y. Yashkir-;H. Driel
我们演示了一种基于ktp的光学参量振荡器（OPO），由二极管泵浦的1064 nm Nd:YAG激光器驱动腔内，由Cr4+:YAG晶体被动调q。该系统工作在1570 nm，重复频率高达50 Hz，研究了Cr4+:YAG光密度的函数特性。在最佳条件下，OPO在单横模下产生1.5 mj, 3.4±0.1 ns的脉冲。对于光密度为0.5的Cr4+:YAG调q元件，当OPO与Nd:YAG峰脉冲强度之比超过1时，腔内能量的转换效率为~ 45%。这些和其他OPO特性与OPO动力学的简单速率方程模型比较有利。
We demonstrate an eye-safe KTP-based optical parametric oscillator (OPO) driven intracavity by a diode-pumped 1064-nm Nd:YAG laser, passively Q-switched by a Cr4+:YAG crystal. The characteristics of this system, which operates at 1570 nm with a repetition rate as high as 50 Hz, are studied as a function of Cr4+:YAG optical density. Under optimum conditions the OPO generates 1.5-mJ, 3.4 ± 0.1-ns pulses in a single transverse mode. For a Cr4+:YAG Q-switch element with an optical density of 0.5 the conversion efficiency of the intracavity energy is ∼45% with the ratio of OPO to Nd:YAG peak-pulse intensity exceeding unity. These and other OPO characteristics compare favorably with a simple rate equation model of the OPO dynamics.