摘要A multi-grating periodically poled LiNbO3 (PPLN) doubly resonant optical parametric oscillator (DROPO) pumped by a 2μm laser is demonstrated experimentally. Employing acousto-optically Q-switched Tm,Ho:GdVO4 laser with pump pulse of 25ns and repetition rate of 10kHz as pump sources firstly, the noncritically quasi-phase-matched (QPM) tunable mid-IR output in 3.87--4.43μm is produced. Wavelength tuning is achieved with crystal temperature tuning from 50--180°C. When the incident average pump power is 3W at 2.048μm, the total OPO output power of 195mW at wavelength 3.88μm is obtained, corresponding to optical-to-optical conversion efficiency up to 6.5%.
Abstract：A multi-grating periodically poled LiNbO3 (PPLN) doubly resonant optical parametric oscillator (DROPO) pumped by a 2μm laser is demonstrated experimentally. Employing acousto-optically Q-switched Tm,Ho:GdVO4 laser with pump pulse of 25ns and repetition rate of 10kHz as pump sources firstly, the noncritically quasi-phase-matched (QPM) tunable mid-IR output in 3.87--4.43μm is produced. Wavelength tuning is achieved with crystal temperature tuning from 50--180°C. When the incident average pump power is 3W at 2.048μm, the total OPO output power of 195mW at wavelength 3.88μm is obtained, corresponding to optical-to-optical conversion efficiency up to 6.5%.
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2007, Vol. 24 
