Design of high speed multistream free space optics link under clear weather conditions
by Shantanu Jagdale; Brijesh Iyer; Sanjay L. Nalbalwar; Shankar B. Deosarkar
International Journal of Autonomic Computing (IJAC), Vol. 3, No. 3/4, 2020

Abstract: Free space optics (FSO) is a line of sight communication technology. FSO has several advantages in terms of high bandwidth, fast deployment and licensed free operation. FSO link performance is limited by the different weather conditions like clear weather, fog and haze. The critical challenge for an FSO link is to maximise the performance in terms of data rate and range. The available long-range WDM systems for very clear weather conditions are working at the maximum data rate of 2.5 Gbps with an overall link capacity of 10 Gbps (2.5 Gbps × 4 channels) for a link range of 150 km. In this paper, four-channel multistream optimised high-speed wavelength division multiplexing (WDM) link with transmitter operating in O, E, L and U bands is proposed to enhance the data rate up to 40 Gbps (10 Gbps × 4 channels) for the very clear weather condition for a range of 150 km. The four-channel designed WDM system is optimised in terms of multiplexer and demultiplexer bandwidth. The observed system performance measure values of the Q factor are 38.61, and BER is 1.40989e–313.

Online publication date: Tue, 20-Apr-2021

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