Title :
High-efficiency LiNbO3 waveguide second-harmonic generation devices with ferroelectric-domain-inverted gratings fabricated by applying voltage
Author :
Kintaka, Kenji ; Fujimur, Masatoshi ; Suhara, Toshiaki ; Nishihara, Hiroshi
Author_Institution :
Dept. of Electron. Eng., Osaka Univ., Japan
fDate :
3/1/1996 12:00:00 AM
Abstract :
The characteristics of the ferroelectric-domain-inverted gratings fabricated by applying voltage at room temperature in Z-cut LiNbO3 crystal were examined for waveguide quasiphase-matched second-harmonic generation (QPM-SHG) devices. Conditions suitable for reproducible fabrication of uniform grating structure were clarified. Devices with uniform and fan-out grating for green and blue light generation were fabricated, and the performances were examined. A normalized SHG efficiency as high as 150%/W was obtained in blue light generation device with uniform grating of 3 mm interaction length
Keywords :
diffraction gratings; electric domains; electro-optical devices; integrated optics; lithium compounds; optical fabrication; optical harmonic generation; optical waveguides; 3 mm; LiNbO3; LiNbO3 waveguide second-harmonic generation devices; QPM-SHG devices; Z-cut LiNbO3 crystal; applying voltage; blue light generation; blue light generation device; fan-out grating; ferroelectric-domain-inverted gratings; green light generation; high-efficiency; interaction length; normalized SHG efficiency; reproducible fabrication; room temperature; uniform grating; uniform grating structure; waveguide quasiphase-matched second-harmonic generation; Annealing; Breakdown voltage; Character generation; Electrodes; Electron beams; Ferroelectric materials; Gratings; Light sources; Optical device fabrication; Temperature;
Journal_Title :
Lightwave Technology, Journal of
