1. Low Threshold and High Conversion Efficiency Nanosecond Mid-Infrared KTA OPO.
- Author
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Zhong Kai, Li Jian, Cui Hai, Xu Deng, Wang Yu, Zhou Rui, Wang Jing, Wang Peng, and Yao Jian
- Subjects
CRYSTAL optics ,CRITICAL phenomena (Physics) ,OPTICAL parametric oscillators ,OPTICAL pumping ,SOLID-state lasers ,ENERGY conversion ,INFRARED radiation - Abstract
Based on a Type II non-critically phase-matched KTA crystal, a low-threshold and high conversion efficiency mid-infrared optical parametric oscillator (OPO) pumped by a diode-end-pumped Nd:YVO4 laser is demonstrated. The OPO threshold is only 0.825 W. The maximum output power of 435mW at 3.47 mm is achieved with the repetition rate of 30 kHz, corresponding to an optical-to-optical conversion efficiency of 4.4%. The photon conversion efficiency is as high as about 64%. The pulse width is 3.5 ns with a peak power of 4kW for the maximum output power. [ABSTRACT FROM AUTHOR]
- Published
- 2009
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