Title :
Large-signal dynamic behavior of distributed-feedback lasers including lateral effects
Author :
Yu, S.F. ; Plumb, R.G.S. ; Zhang, L.M. ; Nowell, M.C. ; Carroll, J.E.
Author_Institution :
Dept. of Eng., Cambridge Univ., UK
fDate :
8/1/1994 12:00:00 AM
Abstract :
The large-signal behavior of DFB lasers is analyzed, including lateral as well as longitudinal variations in carrier density, photon density, and refractive index. The effective index method and other approximations are used to reduce the complex three-dimensional problem to one dimension. The coupled wave and carrier rate equations are then solved in a self-consistent manner. Lateral spatial carrier hole burning and lateral diffusion are found to affect the relaxation oscillation frequency and damping rate of DFB lasers, depending on their detailed structure. The effective time-averaged linewidth enhancement factor is also affected. In symmetric AR-coated λ/4 phase-shifted lasers the side mode suppression ratio can be deteriorated significantly by lateral spatial hole burning when kL is large
Keywords :
carrier density; distributed feedback lasers; laser theory; nonlinear optics; optical hole burning; refractive index; semiconductor lasers; spectral line breadth; DFB lasers; approximations; carrier density; carrier rate equations; complex three-dimensional problem; coupled wave equations; damping rate; distributed-feedback lasers; effective index method; large-signal dynamic behavior; lateral diffusion; lateral effects; lateral spatial carrier hole burning; lateral variations; longitudinal variations; photon density; refractive index; relaxation oscillation frequency; self-consistent manner; side mode suppression ratio; symmetric AR-coated λ/4 phase-shifted lasers; time-averaged linewidth enhancement factor; Charge carrier density; Chirp; Damping; Distributed feedback devices; Educational institutions; Equations; Frequency; Laser feedback; Laser modes; Laser theory;
Journal_Title :
Quantum Electronics, IEEE Journal of
