Title :
Optimum design for multiple-phase-shift distributed feedback laser
Author :
Ogita, S. ; Kotaki, Y. ; Ishikawa, H. ; Imai, H.
Author_Institution :
Fujitsu Labs. Ltd., Kanagawa, Japan
fDate :
6/9/1988 12:00:00 AM
Abstract :
An optimum design for the multiple-phase-shift distributed feedback (MPS-DFB) laser with three phase shifts in the corrugation was established theoretically. It was shown that the optimised MPS-DFB laser gives sufficient threshold gain difference and uniform field distribution even for strong coupling. Therefore, the long cavity MPS-DFB laser is expected to give stable single-longitudinal-mode operation at high injection levels and give a minimum linewidth of less than 500 kHz
Keywords :
distributed feedback lasers; laser cavity resonators; optical communication equipment; semiconductor junction lasers; 500 kHz; MPS-DFB laser; corrugation; high injection levels; long cavity MPS-DFB laser; minimum linewidth; multiple-phase-shift distributed feedback laser; optimum design; stable single-longitudinal-mode operation; strong coupling; three phase shifts; threshold gain difference; uniform field distribution;
Journal_Title :
Electronics Letters
