EFFECTS OF CARRIER HEATING, NONEQUILIBRIUM LO PHONONS AND LATTICE HEATING ON SMALL-SIGNAL MODULATION RESPONSE OF SEMICONDUCTOR-LASERS

A small-signal analysis is presented for the modulation response of se miconductor lasers by simultaneously incorporating the effects of carr ier heating, nonequilibrium LO phonons and lattice heating. The author s theoretically investigate, without the definition of steady-state ca rrier energy relaxation time, the effects of the lifetime of LO phonon s and the thermal conduction time of acoustic on phonons on the small- signal modulation response of semiconductor lasers. They show that, if the LO phonon lifetime approaches the inverse of modulation frequency , the assumption about the quasistatic population variation of LO phon ons may lose its validity in discussing the modulation response of sem iconductor lasers.