Abstract
We present a method of controlling the shape of the domain-inverted structure in an off-cut crystal by utilizing a two-dimensional high-voltage application. With this technique a periodically domain-inverted structure with a period of and a thickness of was fabricated over a 10-mm interaction length. This structure has made possible sufficient overlaps between propagation modes and domain inversion in the waveguide. Using this structure, we demonstrated cw blue second-harmonic generation of 17.3 mW of power at a wavelength of 426 nm with single-pass 55-mW cw AlGaAs laser diode input, which corresponded to 31% power-conversion efficiency.
© 1999 Optical Society of America
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