ZHANG Bai-Gang1,2,3, YAO Jian-Quan1,2,3, LU Yang1, XU De-Gang1, JI Feng1, ZHANG Tie-Li1, ZHAO Xin1, WANG Peng1,2,3, XU Ke-Xin1
1College of Precision Instrument and Opto-Electronics Engineering, Institute of Laser and Optoelectronics, Tianjin University, Tianjin 300072
2Cooperated Institute of Nankai University and Tianjin University, Tianjin 300072
3Key Laboratory of Optoelectric Information Science and Technology (Ministry of Education), Tianjin University, Tianjin 300072
1College of Precision Instrument and Opto-Electronics Engineering, Institute of Laser and Optoelectronics, Tianjin University, Tianjin 300072
2Cooperated Institute of Nankai University and Tianjin University, Tianjin 300072
3Key Laboratory of Optoelectric Information Science and Technology (Ministry of Education), Tianjin University, Tianjin 300072
Abstract： A pulsed nanosecond optical parametric generator (OPG) in periodically poled lithium niobate (PPLN) crystal is presented. The pump laser is an acousto-optically Q-switched Nd:YVO4 laser with the maximum average power of 6.58W. When the repetition rate is 50kHz and the pulse width of the pump source is 80ns, the maximum average total output power of the single-pass PPLN OPG is about 1.9W, which includes 1.322W of 1.536μm signal radiation. The length of the PPLN crystal is only 38.7mm (at room temperature) with a grating period of 28.93μm (at room temperature). The 1.502--1.536μm signal radiation and 3.652--3.465μm idler radiation are obtained by adjusting the PPLN crystal temperature from 155°C to 250°C.
2005, Vol. 22 
