J. Lebihan et G. Yabre, FM AND IM INTERMODULATION DISTORTIONS IN DIRECTLY MODULATED SINGLE-MODE SEMICONDUCTOR-LASERS, IEEE journal of quantum electronics, 30(4), 1994, pp. 899-904
Intermodulation distortion in directly-modulated semiconductor lasers
is described with the aid of a nonlinear differential equation for the
photon density. Both frequency modulation (FM) and intensity modulati
on (IM) have been investigated. Curves are presented of the magnitudes
of the intermodulation products relative to the carriers intensity. S
econd-order distortions are also reported. The comparison of the Besse
l function analysis and the perturbation method is quite successful. F
inally, laser's FM and IM modulation characteristics are compared, and
these theoretical results show that distortion levels would be strong
er in FM than in direct IM, when the same operating conditions are ado
pted.