Abstract

We report a singly resonant pulsed intracavity ${\mathrm{KTiOPO}}_4$ optical parametric oscillator that uses a semimonolithic microchip laser design. The compact (50-mm-long), low-threshold (1.3-W) cavity uses a novel quadrupole deflector $Q$ switch to give $4‐\mathit{\mu }\mathrm{J}$ pulses at $1.064 \mathit{\mu }\mathrm{m}$ and $0.4‐\mathit{\mu }\mathrm{J}$ signal pulses of 5.6-ns duration at $1.53 \mathit{\mu }\mathrm{m}$ with a repetition frequency of 5 kHz when it is pumped with a 2-W laser diode. The signal pulses are diffraction limited and single frequency.

© 1998 Optical Society of America

Compact, actively Q-switched optical parametric oscillator

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Microchip laser–pumped continuous-wave doubly resonant optical parametric oscillator

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