Title :
Analysis of oscillation characteristics of separated-electrode DFB laser diodes
Author :
Kikuchi, Kazuro ; Tomofuji, Hiroaki
Author_Institution :
Dept. of Electron. Eng., Tokyo Univ., Japan
fDate :
10/1/1990 12:00:00 AM
Abstract :
The oscillation characteristics of separated-electrode distributed feedback (DFB) lasers are analyzed by a numerical approach. In the calculation, coupled-mode equations are used including the carrier-density nonuniformity along the laser axis, which is introduced by the spatial hole burning and/or the nonuniform current injection. When the center section of a DFB laser, with three equally separated electrodes, is more strongly pumped than the side sections, high performance is achieved: the mode stability is maintained in the high-power state, resulting in a narrow linewidth. This is because the spatial hole burning is compensated by the larger current injection into the center region. The wide tunable range is also obtained under this bias condition
Keywords :
compensation; distributed feedback lasers; electrodes; laser modes; laser theory; laser tuning; optical hole burning; oscillations; semiconductor junction lasers; spectral line breadth; bias condition; carrier-density nonuniformity; center section; coupled-mode equations; distributed feedback; high-power state; laser axis; laser pumping; mode stability; narrow linewidth; nonuniform current injection; oscillation characteristics; separated-electrode DFB laser diodes; side sections; spatial hole burning; wide tunable range; Distributed feedback devices; Electrodes; Equations; Laser excitation; Laser feedback; Laser modes; Laser stability; Optical coupling; Pump lasers; Tunable circuits and devices;
Journal_Title :
Quantum Electronics, IEEE Journal of
