Abstract

Second-harmonic generation in Ti:LiNbO3 channel waveguide resonators is investigated both theoretically and experimentally as a means of enhancing the conversion efficiency. In particular, symmetric and matched resonators for the fundamental wave are studied. Matched resonators are shown to maximize the efficiency, which can surpass that of nonresonant guides by as many as several orders of magnitude. Experimentally, the theoretical predictions are confirmed by using a single-frequency argon-ion laser of λ = 1.09 μm emission wavelength as the fundamental source. With a matched resonator of 40-mm length a conversion efficiency of 10−3 is achieved with 100-μW fundamental power.

© 1988 Optical Society of America

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