Abstract

We report a quasi-phase-matched optical parametric oscillator, using bulk periodically poled LiNbO3. The optical parametric oscillator, pumped by a 1.064-μm Q-switched Nd:YAG laser, was temperature tuned over the wavelength range 1.66–2.95 μm. The oscillation threshold of ≈0.1 mJ was more than a factor of 10 below the damage limit. The LiNbO3 crystal, fabricated by application of an electric field to a sample with liquid and metal surface electrodes, was 0.5 mm thick with a 5.2-mm interaction length and a quasi-phase-matched period of 31 μm.n

© 1995 Optical Society of America

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