We report blue‐light generation using a first‐order quasi‐phase matched second‐harmonic generation (QPMSHG) in LiTaO3 waveguide. A first‐order periodically domain‐inverted structure can be fabricated using a quick heat‐treatment technique. We have examined the dependence of the depth of the fabricated domain‐inverted region on its width, which critically affects the conversion efficiency of SHG, and designed an optimum domain‐inverted structure for the QPMSHG device. As a result, 15 mW of blue light was generated for a conversion efficiency of 10.3%.
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© 1992 American Institute of Physics.
1992
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