DOUBLY-RESONANT OPTICAL PARAMETRIC OSCILLATORS - TUNING BEHAVIOR AND STABILITY REQUIREMENTS

By way of a theoretical analysis and demonstration of experimental res ults, we contrast the influence of type-I and type-II phase-matching o n the tuning behaviour and stability requirements of doubly-resonant o ptical parametric oscillators. Specifically, for near-degenerate opera tion, we illustrate the advantages of type-Ii, as opposed to type-I, p hase-matching with regard to obtaining single signal and idler mode-pa ir output. For type-II phase-matching, single cluster and multiple clu ster output is shown to depend on the level of pumping and the positio n of the clusters with respect to the optimum phase-matching condition . Within the experimental type-IT phase-matched geometry, we maintain a single signal and idler mode-pair on resonance using a simple cavity length servo-control feedback-loop.