Hughes S, Knorr A, Koch S W
Opt Lett. 1996 Jul 15;21(14):1052-4. doi: 10.1364/ol.21.001052.
The linear propagation of ultrashort optical pulses in semiconductor gain media is investigated. It is shown that a pulse with a central frequency at the transparency point experiences a propagation-induced temporal breakup that is due to the carrier-induced refractive-index characteristics.
