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Noise and crosstalk analysis of SMZ switches

Ultra-high speed OTDM networks require stable and compact all optical switches for demultiplexing and routing. In this paper we investigate the noise and crosstalk characteristics of all optical symmetric Mach-Zehnder (SMZ) switch using a numerical model. Two effects, the relative intensity noise (RIN) and channel crosstalk (CXT) that degrade the performance of the switch are investigated. Numerical simulation results show that RIN and CXT varies with different SOA length, data pulse width, RMSjitter and the bit rate.