Abstract

We demonstrate, for the first time to our knowledge, the generation of second-harmonic pulses by use of a novel methodology for achieving first-order quasi-phase matching in a semiconductor waveguide crystal. This methodology is based on a periodic modulation of the susceptibility coefficient along the direction of light-beam propagation in which advantage is taken of the fact that χGaAs2>χAlxGa1-xAs2. Efficient second-harmonic generation at 975  nm of a pump wavelength of 1950  nm has been demonstrated for a crystal with a nonuniform domain dimension (duty cycle, 39/61).

© 2001 Optical Society of America

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