Abstract:
The article is devoted to the study of four-wave mixing (FWM) in a
semiconductor optical amplifier with quantum dots (QD-SOA).
Experimental measurements of FWM signals are characterized in nonlinear
media of GaAs-based QD-SOA with gain in the 1,550 nm region.
Theoretical part of nonlinear effect of FWM is studied and important
all-optical communication applications are listed. Experimental studies of a
four-wave system are described and an analysis of FWM signals is given for
various input powers of pump signals and injection currents. The devices are
compared in terms of such parameters as conversion efficiency and
signal-to-noise ratio. The results of the study made it possible to reveal the
possibility of the effect of FWM signals on useful signals in channels with
spectral division multiplexing wavelength division multiplexing (WDM) in
the downstream and upstream in a semiconductor optical amplifier. Based
on the experimental results, it was concluded that FWM does not affect
adjacent channels of WDM signals and does not generate additional optical
noise when scaling the WDM gigabit passive optical network (GPON) up to
60 km using semiconductor optical amplifiers (SOAs).
