Femtosecond self- and cross-phase modulation in semiconductor laser amplifiers

Ultrafast refractive-index dynamics in a multiquantum-well semiconductor optical amplifier

“…Our numerical results reveal that for mA, a phase change of at least 180 can be obtained while the phase change almost vanishes for mA. This result also clarifies inconsistent results that are reported in the literature about the sign of [8]- [11]. We can only explain our experimental results if and have opposite signs, so that the phase change due to TPA opposes the phase change due to the SOA gain.…”

All-optical switching of an ultrashort pulse using a semiconductor optical amplifier in a Sagnac-interferometric arrangement

“…First of all, after studying the literature [6,7,[9][10][11], one can doubt whether we have taken the correct sign for a 2 . Our choice is consistent with [6,7], but we note that if a 2 has the opposite sign even larger phaseshifts would occur.…”

Polarization dependence of non-linear gain compression factor in semiconductor optical amplifier

“…(6) and (7) give accurate results for input Gaussian pulses in the range of tens and hundreds of picoseconds. However, for pulses of the order of 1 ps, a semiclassical model has been developed by Hong et al [8] and [9], where the fast dynamics of a SOA, specifically the SHB is included by using a modified gain, g , defined by:…”