Abstract:
A theoretical analysis is presented to find the impact of crosstalk due to optical
cross-connects (aXCs) in a WDM network. An N x N AWG based axc is first
considered with one wavelength per channeL Thereafter, a mux/demux based axc
with N number of channels and M number of wavelengths per channel isinvestigated.
The analytical expressions of in-band and out-band(inter-band) crosstalks
due to these axcs are developed. The expression for BER is derived considering
the effect of in-band and inter-band crosstalk together for unidirectional operation
of an axc in a WDM system. Analysis is also extended to bidirectional axc
in a WDM network considering the impact of crosstalk and backscattering. Performance
results are evaluated numerically considering M-channel WDM system
with N x N axc operating at a bit rate of 10 Gb/s with several system parameters.
Performance degradation in terms of BER and power penalty due to axc
induced crosstalk is evaluated and optimum system design parameters are determined
for operation of a bit rate of 10 Gb/s and BER of 10-9. The results will
find application in designing a multiwavelength WDM optical transport network.
