Performance analysis of WDM-free-space optical transmission system with M-QAM modulation under atmospheric and optical nonlinearities

Abstract

In this paper, we have studied the performance of M-QAM based free-space optical link (FSO) integrated with Wavelength-division multiplexing (WDM) in the presence of both optical nonlinearity and atmospheric turbulence. Our analysis shows that joint effect of optical and FSO channel nonlinearity degrades the transmission performance link performs in terms of BER and EVM. The optimization in terms of optical modulation index (OMI) to mitigate the above detrimental factors is also presented.

Simulative Investigation of Long- Range 32x3 Gbps WDM-FSO Link Under Different Weather Attenuation Conditions

“…SOA amplifiers have Large BW & can operate at 800, 1300, and 1500 nm wavelength regions. All these properties craft SOA a good choice for optical amplification [7] [8]. Laser power has plays important role in designing any system; so lesser this value, higher will be the quality of system [1].…”