Abstract
The increase in the circulating signal and idler fields that occurs in a high- doubly resonant optical parametric oscillator (OPO) as it approaches resonance results in a small increase in the crystal temperature owing to absorption of the generated fields. The temperature change affects the refractive index of the crystal and alters the optical path length of the cavity. This effect may lead to self-frequency locking of the OPO to a specific resonance of the signal and idler fields, and it also results in peculiarities in the transient response of the system as it is scanned through resonance. We show that the experimentally observed effects are consistent with the results of a numerical model of the OPO.
© 1997 Optical Society of America
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