Title :
Quasi-phase-matched second harmonic generation in a LiTaO3 waveguide
Author :
Yamamoto, Kazuhisa ; Mizuuchi, Kiminori ; Taniuchi, Tetsuo
Author_Institution :
Matsushita Electric Industrial Co. Ltd., Osaka, Japan
fDate :
9/1/1992 12:00:00 AM
Abstract :
The authors report third-order quasi-matched (QPM) second harmonic generation (SHG) in a LiTaO3 channel waveguide. A deep domain-inverted region is first fabricated by a proton-exchange and heat treatment technique. Then a uniform and low-pass channel waveguide is fabricated by pyrophosphoric acid proton exchange. Consequently, 12 mW of blue light is obtained at 424 nm wavelength with a conversion efficiency of 6%. The observed FWHM (full-width half maximum) temperature acceptance width for SHG power is 3.2°C and FWHM wavelength acceptance bandwidth for that is 0.2 nm. It is also shown that diffraction limited focusing of the generated blue light may be obtained
Keywords :
electric domains; ferroelectric materials; lithium compounds; optical harmonic generation; optical waveguides; 12 mW; 424 nm; 6 percent; FWHM temperature acceptance width; FWHM wavelength acceptance bandwidth; LiTaO3; LiTaO3 channel waveguide; blue light; conversion efficiency; deep domain-inverted region; diffraction limited focusing; heat treatment; proton-exchange; pyrophosphoric acid; second harmonic generation; third order quasi phase matched SHG; Frequency conversion; Heat treatment; Nonlinear optics; Optical devices; Optical harmonic generation; Optical waveguides; Power generation; Protons; Temperature; Writing;
Journal_Title :
Quantum Electronics, IEEE Journal of
