Transition from single-mode to multimode operation of an injection-seeded pulsed optical parametric oscillator
Optical-heterodyne measurements are made on ~842-nm signal output of an injection-seeded optical parametric oscillator (OPO) based on periodically poled KTiOPO4 pumped at 532 nm by long (~27-ns) pulses from a Nd:YAG laser. At low pump energies (≤ 2.5 times the free-running threshold), the narrowband tunable OPO output is single-longitudinal-mode (SLM) and frequency chirp can be <10 MHz, much less than the transformlimited optical bandwidth (~17.5 MHz). We explore the transition from SLM...[Show more]
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