Title :
Spectral aspect of degradation in 1.55 mu m long-cavity MQW DFB lasers
Author :
Fukuda, Mitsuo ; Kano, Fumiyoshi ; Kurosaki, Takeshi ; Yoshida, Jun-ichi
Author_Institution :
NTT Opto-Electron. Lab., Kanagawa, Japan
fDate :
4/1/1992 12:00:00 AM
Abstract :
Degradation behaviors, particularly for the increase in spectral linewidth and FM efficiency, in 1.55 mu m long-cavity MQW (multiple quantum well) DFB (distributed feedback) lasers, with a spectral linewidth of around 1 MHz, are presented from the viewpoint of coherent system application. Through the clarification of the behaviors, it is shown that highly coherent lasers are sufficiently durable in coherent transmission systems.<>
Keywords :
distributed feedback lasers; frequency modulation; optical communication equipment; optical modulation; semiconductor junction lasers; spectral line breadth; 1.55 micron; FM efficiency; IR sources; coherent system application; coherent transmission systems; diode lasers; distributed feedback; highly coherent lasers; laser cavity resonators; light coherence; long-cavity MQW DFB lasers; multiple quantum well; optical testing; spectral laser degradation; spectral linewidth; Degradation; Electrons; Fiber lasers; Indium phosphide; Laser noise; Laser transitions; Optical distortion; Optical films; Optical noise; Quantum well devices;
Journal_Title :
Photonics Technology Letters, IEEE
