Title :
Bias current dependence of FM efficiency in tunable three-electrode DFB lasers
Author :
Tohyama, Masaki ; Onomura, Masaaki ; Funemizu, Masahisa ; Suzuki, Nobuo
Author_Institution :
Mater. and Devices Res. Labs., Toshiba Corp., Kawasaki, Japan
fDate :
4/1/1994 12:00:00 AM
Abstract :
The carrier-induced frequency modulation (FM) mechanism is investigated for tunable three-electrode DFB lasers. The bias current dependence of the FM efficiency in actual devices is successfully explained in a concise manner. The direction of the frequency shift (blue or red shift) depends on the position of the lasing mode in the stopband, which is determined by both the carrier and the thermal effects on the refractive index under a given bias condition.<>
Keywords :
distributed feedback lasers; electrodes; frequency modulation; laser modes; laser theory; laser tuning; optical modulation; red shift; refractive index; semiconductor lasers; FM efficiency; bias condition; bias current dependence; blue shift; carrier effects; carrier-induced frequency modulation; lasing mode; red shift; refractive index; stopband; thermal effects; tunable three-electrode DFB lasers; Charge carrier density; Frequency modulation; Laser feedback; Laser modes; Laser tuning; Optical feedback; Optical modulation; Optical transmitters; Refractive index; Tunable circuits and devices;
Journal_Title :
Photonics Technology Letters, IEEE
