Abstract
One-dimensional periodically poled structures provide Quasi-Phase-Matched (QPM) devices which generate various kinds of light sources by nonlinear interactions such as second-harmonic generation, sum-frequency generation, and difference-frequency generation (DFG). t New nonlinear photonic devices with two-dimensional periodically poled structures have been proposed. 2 All these devices with a complicated domain structure require precise domain control.
© 2002 Optical Society of America
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