Evaluation of Optimum Threshold in OCDM/WDM Optical Packet Switches

In this paper we illustrate a procedure to evaluate the optimum receiver threshold in Optical Code Division Multiplexing (OCDM) systems using Gold Codes. The use of the optimum threshold allows for a higher number of optical codes carried on each wavelength. The increase in OCDM/WDM Optical Packet Switch performance is also evaluated when the threshold optimization is performed. We show that when the offered traffic is equal to p=0,7, the packet loss probability of the OCDM/WDM switch in saturation conditions, equals 1,28*10^-6 in the case in which the optimal receiver threshold is used. On the contrary the performance reaches only 3,91*10^-4 if a traditional threshold is chosen.