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High power blue light generation by frequency doubling of a laser diode in a periodically domain‐inverted LiTaO3 waveguide

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4 Author(s)
Yamamoto, Kazuhisa ; Optical Devices Research Laboratory, Components and Devices Research Center, Matsushita Electric Industrial Co., Ltd., Yagumo‐nakamachi 3‐1‐1, Moriguchi, Osaka, 570 Japan ; Mizuuchi, Kiminori ; Kitaoka, Y. ; Kato, Makoto

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We report high power and stable blue‐light generation by frequency doubling a laser diode, stabilized by a grating feedback technique, in a periodically domain‐inverted LiTaO3 waveguide. Due to the deep domain‐inverted regions and strong waveguide confinement formed by proton‐exchange and a quick heat treatment, high efficiency second harmonic generation (SHG) has been obtained. Locking the oscillation wavelength of a laser diode through the waveguide by a grating feedback technique, 8 mW of stable blue SHG has been demonstrated.

Published in:

Applied Physics Letters  (Volume:62 ,  Issue: 21 )

Date of Publication:

May 1993

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