Performance Analysis of Multi-wavelength Transport Network Employing OXC with Wavelength Converter based on XPM in SMF and MZI

Abstract

Performance analysis is carried out to investigate the effect of amplified spontaneous emission (ASE) noise, interferometric intensity noise from wavelength converter and crosstalk due to WDM components on the performance of an optical multi-wavelength transport network employing wavelength converters based on XPM in a single-mode fiber (SMF) and Mach-Zehnder interferometer (MZI). The results show an accumulation of noise from the ASE and wavelength converter as a channel traverses through N OXCs resulting in a receiver sensitivity of -20.0 dBm for N = 5 and -13.1 dBm for N = 20. The ASE noise is dominant at the receiver as the interferometric intensity noise is insignificant by comparison. The accumulated interferometric noise at the receiver depends on the Free Spectral Range (FSR) of the MZI used. With ASE ignored, it produces significant noise with small values of FSR (< 0.01 GHz).

Effect of Relative Intensity Noise in Optical Transmission Systems Employing Wavelength Conversion Based on XPM and MZI

“…As such, the impact of the laser-induced noise is generally negligible compared to receiver shot and thermal noise. The impact might increase slightly with the use of cascaded wavelength converters in a network [7], but it is still largely negligible.…”