Title :
Dynamic analysis of radiation and side-mode suppression in a second-order DFB laser using time-domain large-signal traveling wave model
Author :
Zhang, L.M. ; Yu, S.F. ; Nowell, M.C. ; Marcenac, D.D. ; Carroll, J.E. ; Plumb, R.G.S.
Author_Institution :
Dept. of Eng., Cambridge Univ., UK
fDate :
6/1/1994 12:00:00 AM
Abstract :
In this paper, we have developed a relatively simple algorithm to calculate the large-signal dynamic response of DFB lasers by solving the time-dependent coupled wave equations directly in the time domain. The spontaneous emission noise, longitudinal variations of carrier (hole burning) and photon densities as well as that of the refractive index are taken into consideration. To demonstrate the power of this straightforward algorithm, the model shows how the side-mode suppression ratio in devices with high κL and a λ/4: phase shift is significantly affected by the radiation in the second-order DFB laser. The time-dependent radiation pattern in grating-coupled surface-emitting lasers is also calculated for the first time
Keywords :
distributed feedback lasers; laser modes; optical hole burning; semiconductor device models; semiconductor device noise; semiconductor lasers; time-domain analysis; algorithm; grating-coupled surface-emitting lasers; hole burning; large-signal dynamic response; longitudinal variations of carrier; photon densities; refractive index; second-order distributed feedback laser; side-mode suppression ratio; spontaneous emission noise; time-dependent coupled wave equations; time-dependent radiation pattern; time-domain large-signal traveling wave model; Distributed feedback devices; Gratings; Laser feedback; Laser modes; Optical coupling; Optical surface waves; Partial differential equations; Refractive index; Spontaneous emission; Surface emitting lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
