Second-Harmonic Generation of Blue Light in Epitaxial K3Li2-xNb5+xO15+2x Waveguides on K3Li2-x(Nb0.98Ta0.02)5+xO15+2x Substrates by Metalorganic Chemical Vapor Deposition.

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  • Onoe Atsushi
    Corporate Research and Development Laboratories, Pioneer Corporation, 6-1-1 Fujimi, Tsurugashima, Saitama 350-2288, Japan
  • Yoshino Takashi
    NGK Insulators, Ltd., 2-56 Suda-cho, Mizuho-ku, Nagoya 467-8530, Japan
  • Imai Katsuhiro
    NGK Insulators, Ltd., 2-56 Suda-cho, Mizuho-ku, Nagoya 467-8530, Japan
  • Imaeda Minoru
    NGK Insulators, Ltd., 2-56 Suda-cho, Mizuho-ku, Nagoya 467-8530, Japan
  • Chikuma Kiyofumi
    Corporate Research and Development Laboratories, Pioneer Corporation, 6-1-1 Fujimi, Tsurugashima, Saitama 350-2288, Japan

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  • Second-Harmonic Generation of Blue Light in Epitaxial K<sub>3</sub>Li<sub>2-<i>x</i></sub>Nb<sub>5+<i>x</i></sub>O<sub>15+2<i>x</i></sub>Waveguides on K<sub>3</sub>Li<sub>2-<i>x</i></sub>(Nb<sub>0.98</sub>Ta<sub>0.02</sub>)<sub>5+<i>x</i></sub>O<sub>15+2<i>x</i></sub>Substrates by Metalorganic Chemical Vapor Deposition

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We report a new second-harmonic generation blue laser using a K3Li2-xNb5+xO15+2x single crystal film waveguide on a K3Li2-x(Nb0.98Ta0.02)5+xO15+2x crystal substrate by the metalorganic chemical vapor deposition method. Second-harmonic blue light with output power of 2 mW at 487 nm was successfully generated. The phase-matched wavelength bandwidth of the device was 1.3 nm, and the temperature coefficient of the phase-matched wavelength was 0.36 nm/°C. Crystallographic evaluation was also performed for the KLN thin film crystal. The (001) plane of KLN crystal film was well orientated to the (001) plane of the KLNT substrate, and the surface morphology of the film was very smooth. Moreover, it was revealed that an as-deposited KLN film crystal has a single domain structure.

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