【摘 要】
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A multi-grating periodically poled LiNbO3 (PPLN) doubly resonant optical parametric oscillator (DROPO) pumped by a 2-μm laser is demonstrated experimentally. E
【机 构】
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National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150001
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A multi-grating periodically poled LiNbO3 (PPLN) doubly resonant optical parametric oscillator (DROPO) pumped by a 2-μm 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 quasiphase-matched (QPM) tunable mid-IR output in 3.87-4.43 μm is produced. Wavelength tuning is achieved with crystal temperature tuning from 50-180 ℃. When the incident average pump power is 3 W at 2.048μm, the total OPO output power of 195 mW at wavelength 3.88 μm is obtained, corresponding to optical-to-optical conversion efficiency up to 6.5%.
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