Title :
Performance of 1.5 μm DFB lasers with a narrow stripe region
Author :
Kinoshita, Junichi ; Ohtsuka, Kazuaki ; Agatsuma, Hiroyuki ; Tanaka, Akira ; Matsuyama, Takayuki ; Makuta, Akio ; Kobayashi, Hirofumi
Author_Institution :
Toshiba Corp., Yokohama, Japan
fDate :
6/1/1991 12:00:00 AM
Abstract :
The performance of distributed feedback (DFB) lasers with a narrow region in the middle of the waveguiding strip and antireflective(AR)-coated facet ends is presented. The narrow region is designed to act as a three-quarter wavelength phase shift. Single longitudinal mode (SLM) capability is discussed both theoretically and experimentally. Calculated results predict the shift region is effective in relaxing axial hole burning because of a dip at the center of the axial field profile and a smaller optical confinement factor in the region. Experimentally, stable SLM operation up to more than 50 mW, a sidemode suppression ratio of more than 40 dB, and 3 dB modulation bandwidth over 10 GHz are achieved
Keywords :
distributed feedback lasers; laser transitions; optical hole burning; 1.5 micron; 10 GHz; anti-reflective coated facet ends; axial field profile; axial hole burning; distributed feedback lasers; modulation bandwidth; narrow stripe region; optical confinement factor; performance; shift region; sidemode suppression ratio; single longitudinal mode capability; three-quarter wavelength phase shift; waveguiding strip; Bandwidth; Distributed feedback devices; Laser feedback; Laser modes; Optical device fabrication; Optical feedback; Optical waveguides; Phase modulation; Quantum well devices; Waveguide lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
