A Low-Pump-Threshold High-Repetition-Rate Intracavity Optical Parametric Generator Based on Periodically Poled Lithium Niobate
JI Feng1,2,3, ZHANG Bai-Gang1,2,3, LI En-Bang1, ZHOU Rui1, ZHANG Tie-Li1, LU Yang1, ZHAO Pu1, WANG Peng1, YAO Jian-Quan1,2,3
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
A Low-Pump-Threshold High-Repetition-Rate Intracavity Optical Parametric Generator Based on Periodically Poled Lithium Niobate
JI Feng1,2,3;ZHANG Bai-Gang1,2,3;LI En-Bang1;ZHOU Rui1;ZHANG Tie-Li1;LU Yang1;ZHAO Pu1;WANG Peng1;YAO Jian-Quan1,2,3
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 low-pump-threshold high-repetition-rate intracavity optical parametric generator (IOPG) by using a periodically poled lithium niobate (PPLN) is reported. The PPLN, which is 18.7mm long and has a grating period of 28.93μm at room temperature, is inserted in a diode-end-pumped Nd:YVO4 laser with an acousto-optic Q switch. The parametric generation threshold is 1.3W (diode laser power) at a Q-switch repetition rate of 19kHz. At an incident diode pump power of 5W, an average signal output power of 280mW has been achieved. The signal pulse duration is approximately 85ns. By changing the crystal temperature from 120°C to 250°C, the signal wavelength can be tuned from 1.493μm to 1.538μm.
2006, Vol. 23 
