We report the generation of tunable picosecond pulses in the near infrared by synchronous pumping of an optical parametric oscillator based on the crystal KTP with a frequency-doubled, actively mode-locked, Q-switched, diode-laser-pumped Nd:YLF laser at 523.5 nm. The oscillator provides tunable radiation over the ranges of 0.946–1.020 µm and 1.075–1.172 µm in pulses of ~8-ps duration, with average output powers approaching 2 mW, at a 500-Hz repetition rate. The threshold Q-switched pulse energy was 4 µJ, and pump depletions as high as 56% were observed when pumping 5.5 times above threshold. At this pumping intensity the amplitude stability of the optical parametric oscillator output pulses was ±2%.

© 1991 Optical Society of America

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