Title :
Blue-light generation by frequency doubling of a laser diode in a periodically domain-inverted LiTaO/sub 3/ waveguide
Author :
Yamamoto, Kazuhisa ; Mizuuchi, Kiminori
Author_Institution :
Matsushita Electr. Ind. Co. Ltd., Osaka, Japan
fDate :
5/1/1992 12:00:00 AM
Abstract :
The authors report quasi-phase matched second-harmonic generation by frequency doubling of a laser diode in LiTaO/sub 3/ having a first-order periodically domain-inverted region and proton-exchanged channel waveguide. A deep domain-inverted region and a low-loss channel waveguide with strong confinement are formed by using proton-exchange and quick heat treatment techniques. Utilizing this structure, a high normalized conversion efficiency of 157%/W is obtained with a Ti:Al/sub 2/O/sub 3/ laser. Using a temperature-controlled laser diode and AR coating on the input and output facet of the waveguide, the laser diode maintains single-mode oscillation without any mode hopping. Consequently, 1.1 mW of blue light is obtained at a wavelength of 436.5 nm.<>
Keywords :
integrated optics; ion exchange; laser beams; lithium compounds; optical harmonic generation; optical waveguides; 1.1 mW; 436.5 nm; AR coating; Al/sub 2/O/sub 3/:Ti; LiTaO/sub 3/; Ti:Al/sub 2/O/sub 3/ laser; antireflection coating; blue light generation; first-order periodically domain-inverted region; frequency doubling; high normalized conversion efficiency; input facet; laser diode; light sources; low-loss; output facet; periodically domain-inverted LiTaO/sub 3/ waveguide; proton-exchanged channel waveguide; quasi-phase matched second-harmonic generation; quick heat treatment; single-mode oscillation; strong confinement; temperature-controlled; Diode lasers; Frequency; Laser modes; Nonlinear optics; Optical devices; Optical harmonic generation; Optical polarization; Optical waveguides; Optimized production technology; Waveguide lasers;
Journal_Title :
Photonics Technology Letters, IEEE
