Low Threshold and High Conversion Efficiency Nanosecond Mid-Infrared KTA OPO
ZHONG Kai1,2, LI Jian-Song1,2, CUI Hai-Xia3,1, XU Deng-Gang1,2, WANG Yu-Ye1,2, ZHOU Rui1,2, WANG Jing-Li1,2, WANG Peng1,2, YAO Jian-Quan1,2
1Institute of Laser and Optoelectronics, College of Precision Instrument and Optoelectronic Engineering, Tianjin University, Tianjin 3000722Key Laboratory of Optoelectronic Information Science and Technology (Ministry of Education), Tianjin University, Tianjin 3000723National Key Lab of High Power Semiconductor Laser, Changchun University, Changchun 130022
Low Threshold and High Conversion Efficiency Nanosecond Mid-Infrared KTA OPO
ZHONG Kai1,2, LI Jian-Song1,2, CUI Hai-Xia3,1, XU Deng-Gang1,2, WANG Yu-Ye1,2, ZHOU Rui1,2, WANG Jing-Li1,2, WANG Peng1,2, YAO Jian-Quan1,2
1Institute of Laser and Optoelectronics, College of Precision Instrument and Optoelectronic Engineering, Tianjin University, Tianjin 3000722Key Laboratory of Optoelectronic Information Science and Technology (Ministry of Education), Tianjin University, Tianjin 3000723National Key Lab of High Power Semiconductor Laser, Changchun University, Changchun 130022
摘要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 0.825W. The maximum output power of 435mW at 3.47μm is achieved with the repetition rate of 30kHz, 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 3.5ns with a peak power of 4kW for the maximum output power.
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 0.825W. The maximum output power of 435mW at 3.47μm is achieved with the repetition rate of 30kHz, 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 3.5ns with a peak power of 4kW for the maximum output power.
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2009, Vol. 26 
