Title :
InGaAs angled-grating distributed Bragg reflector lasers integrated with grating outcoupler for collimation
Author :
Uemukai, Masahiro ; Kunoh, Yasumitsu ; Shimada, Naoyuki ; Suhara, Toshiaki
Author_Institution :
Dept. of Electron. Eng., Osaka Univ., Japan
Abstract :
An angled-grating distributed Bragg reflector (DBR) laser integrated with a grating outcoupler (GO) is proposed and demonstrated. It consists of an angled broad-area gain stripe surrounded by angled DBR (α-DBR) gratings parallel to the gain stripe and two DBR gratings for feedback at the stripe ends, and a GO for emitting a collimated output beam. Due to distributed Bragg reflection in the α-DBR gratings, filamentation can be suppressed. Single-mode lasing up to 69 mW peak power was obtained under pulse condition. A collimated output beam with divergence angles, close to the diffraction limit, was obtained. These results confirm the effectiveness of the α-DBR gratings.
Keywords :
Bragg gratings; III-V semiconductors; distributed Bragg reflector lasers; gallium arsenide; high-speed optical techniques; indium compounds; integrated optics; laser beams; laser modes; light diffraction; optical couplers; quantum well lasers; ternary semiconductors; Grating outcoupler; InGaAs; angled DBR gratings; angled broad-area gain stripe; angled-grating distributed Bragg reflector lasers; collimated output beam; collimation; diffraction limit; distributed Bragg reflection; divergence angles; feedback; filamentation; integrated optics; pulse condition; quantum well lasers; single-mode lasing; Bragg gratings; Collimators; Diffraction; Distributed Bragg reflectors; Distributed feedback devices; Indium gallium arsenide; Laser beams; Laser feedback; Optical reflection; Output feedback;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2003.819517
