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Second harmonic generation in electric poled X-cut MgO-doped LiNbO3 waveguides

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3 Author(s)
Sonoda, Shinichiro ; Miyanodai Technology Development Center, Fuji Photo Film Co., Ltd., 798 Miyanodai, Kaisei-machi, Ashigarakami-gun, Kanagawa 258, Japan ; Tsuruma, Isao ; Hatori, Masami

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We demonstrate that quasi-phase-matched second harmonic generation occurs in annealed proton-exchanged (APE) X-cut MgO 5 mol % doped LiNbO3 (MgO:LN) waveguides supporting a TE-mode guided wave. Formation of a domain inversion was achieved by applying electric fields in X-cut and Y-cut MgO:LN. The depth of the formed domain inversion was 1 μm with a period of 4.75 μm. Anomalous characteristics of current versus voltage (I–V) of samples having domain inversion formed therein were found to have similar properties to a diode. A blue light having a wavelength of 475 nm and a power of 2.2 mW has been obtained with a normalized second harmonic conversion efficiency of 60%/W cm2 with uniform grating of 6 mm by using a Ti:Al2O3 laser as a fundamental wave source. © 1997 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:70 ,  Issue: 23 )