Abstract
We demonstrate single-frequency operation of a cw quasi-phase-matched singly resonant optical parametric oscillator (SRO). We obtained widely tunable output from 1.66 to 1.99 (signal) and from 2.29 to 2.96 (idler) by employing a periodically poled lithium niobate multigrating chip. Using a single-frequency miniature Nd:YAG ring laser as a pump source results in SRO output with high spectral purity and frequency stability (), which can be continuously tuned over 2 GHz without mode hops. We obtain a minimum SRO threshold of 260 mW by resonating the pump wave in the SRO cavity.
© 1997 Optical Society of America
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