Chinese Optics Letters, 2008, 6 (3): 03207, Published Online: Mar. 27, 2008
Threshold characteristic of intracavity optical parametric oscillator pumped by all-solid-state Q-switched laser 
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光学参量振荡 阈值 Q开关 侧面泵浦 190.4970 Parametric oscillators and amplifiers 140.3540 Lasers, Q-switched 140.3480 Lasers, diode-pumped
Abstract
We derive the threshold pump intensity for a singly resonant intracavity optical parametric oscillator (IOPO) based on a temporal coupled field model. Particular attention is paid to the dependence of the intracavity singly resonant OPO (SRO) threshold intensity on the signal wave output coupling. Meanwhile, a Nd:YAG laser pumped KTiOPO4 (KTP) IOPO for eye-safe laser output is studied experimentally. The experiment is performed with four signal wave output reflectivities of 60%, 70%, 80%, and 90%, respectively. The measured values are in good agreement with the theoretical results. With an output coupler reflectivity of 80%, a peak power of 70 kW at 1572 nm has been obtained at a repetition rate of 3.5 kHz. The pulse width is 4.9 ns. Such investigation is helpful to identifying suitable operational regime of low pump intensity.
Yuye Wang, Degang Xu, Yizhong Yu, Wuqi Wen, Xifu Li, Jianquan Yao. Threshold characteristic of intracavity optical parametric oscillator pumped by all-solid-state Q-switched laser[J]. Chinese Optics Letters, 2008, 6(3): 03207.
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