Second-Harmonic Generation of Blue Light in Epitaxial K_3Li_<2-x>Nb_<5+x>O_<15+2x> Waveguides on K_3Li_<2-x>(Nb_<0.98>Ta_<0.02>)_<5+x>O_<15+2x> Substrates by Metalorganic Chemical Vapor Deposition

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We report a new second-harmonic generation blue laser using a K_3Li_<2-x>Nb_<5+x>O_<15+2x> single crystal film waveguide on a K_3Li_<2-x>(Nb_<0.98>Ta_<0.02>)_<5+x>O_<15+2x> crystal substrate by the metalorganic chemical vapor deposition method. Second-hannonic blue light with output power of 2mW 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/℃. 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.
社団法人応用物理学会の論文
2002-09-15