G. Swift et al., MODELING OF SEMICONDUCTOR-LASER AMPLIFIER FOR THE TERAHERTZ OPTICAL ASYMMETRIC DEMULTIPLEXER, IEE proceedings. Circuits, devices and systems, 145(2), 1998, pp. 61-65
A semiconductor laser amplifier (SLA) may be used as a nonlinear eleme
nt in ultrafast optical asymmetric demultiplexers. For demultiplexing
to take place in the optical domain it is necessary to create a switch
ing window by placing the SLA asymmetrically in an optical loop and sa
turating it with a short duration control pulse. The exact size of thi
s window. for selecting the required pulse at the output port, depends
mainly on the precise location of the SLA within the loop. Tn the pap
er a finite length model of an SLA, used as a switching gate within th
e loop, is presented and results for the carrier density, gain and pha
se time responses together with transmission (switching) windows are a
lso given. The result obtained for the latter is compared with practic
al data.