Second harmonic generation in electric poled X-cut MgO-doped LiNbO3 waveguides
- 9 June 1997
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 70 (23) , 3078-3080
- https://doi.org/10.1063/1.119096
Abstract
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.Keywords
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