Abstract
Nonlinear optical effects as second harmonic and difference frequency generation, parametric amplification and oscillation are studied to achieve efficient frequency conversion in optical waveguide structures. Our experiments with low loss Ti:LiNbO3 optical wave-guides and waveguide resonators are shortly reviewed. The results demonstrate that small, (tunable) integrated optical frequency converters can be fabricated using medium and low power (semiconductor) lasers as pump sources.
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