Abstract

Frequency doubling of a 680-nm laser diode in periodically poled LiTaO3 is presented. By selective proton exchange followed by high-voltage pulse application, a second-order periodic domain inversion having uniform periodicity and optimum duty cycle was fabricated over a 10-mm interaction length in a 200-μm-thick LiTaO3 substrate. A 340-nm wavelength of harmonic ultraviolet light was generated in a single pass through the domain-inverted structure.

© 1996 Optical Society of America

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