Title :
Corrugation-pitch modulated MQW-DFB lasers with narrow spectral linewidth
Author :
Okai, Makoto ; Tsuchiya, Tomonobu ; Uomi, Kazuhisa ; Chinone, Naoki ; Harada, Tatsuo
Author_Institution :
Hitachi Ltd., Tokyo, Japan
fDate :
6/1/1991 12:00:00 AM
Abstract :
Narrow spectral linewidth lasers are developed for optical coherent transmission systems. To obtain a narrow spectral linewidth, a CPM (corrugation-pitch modulated) structure is introduced into 1200-μm-long MQW-DFB (multi-quantum well distributed feedback) lasers. The CPM structure effectively suppresses the axial spatial hole burning effect and stabilized single-mode spectrum at high output powers. A spectral linewidth of 170 kHz was achieved at an output power of 25 mW. Details of corrugation fabrication method that makes the CPM structure possible are described
Keywords :
distributed feedback lasers; optical hole burning; optical modulation; semiconductor junction lasers; semiconductor quantum wells; spectral line breadth; 1200 micron; 25 mW; axial spatial hole burning effect; corrugation fabrication method; corrugation pitch modulated multi-quantum well distributed feedback lasers; narrow spectral linewidth; optical coherent transmission systems; output power; single-mode spectrum; Distributed feedback devices; Fiber lasers; Laser feedback; Optical feedback; Optical losses; Optical mixing; Optical receivers; Power generation; Quantum well devices; Quantum well lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
