Large signal modulation of semiconductor laser at high bit rates

Abstract

In this paper we present numerical simulation of an InGaAs/InP heterostructure laser response to a digital modulation at high bit rates. The paper focuses on the influence of the nonlinear gain suppression and radiation recombination time on the relaxation oscillations. We find that relaxation oscillations might increase BER at high bit rates. The model which takes into account nonlinear gain suppression predicts better performances of the laser.

U ovom radu predstavljena je numerička simulacija fenomena prelaznog režima uključenja poluprovodničkog heterostrukturnog lasera na bazi InGaAsP/InP, pri visokim bitskim protocima. Rad istražuje uticaj nelinearnog faktora potiskivanja i vremena rekombinacije na relaksacione oscilacije kod heterostrukturnih lasera. U razmatranju ovog problema pokazalo se da relaksacione oscilacije mogu da povećaju BER pri velikim bitskim protocima. Model koji u obzir uzima nelinearni faktor potiskivanja predviđa bolje performanse lasera.