Experimental analysis of a triple-hop relay-assisted FSO system with turbulence

• Published in: Optical switching and networking 2019-07, Vol.33, p.194-198
• Main Authors: Mohd Nor, Norhanis Aida, Ghassemlooy, Zabih, Zvanovec, Stanislav, Khalighi, Mohammad-Ali, Bhatnagar, Manav R., Bohata, Jan, Komanec, Matej
• Format: Article
• Language: English
• Subjects: All-optical relaying; Atmospheric turbulence; BER; Engineering Sciences; Free space optics; Multi-hop FSO network; Optics; Photonic; Relay-assisted FSO; Signal and Image processing
• ISSN: 1573-4277; 1872-9770
• DOI: 10.1016/j.osn.2017.11.002

This paper outlines experimental investigation of the performance of the wireless optical network based on an all-optical triple-hop free space optical (FSO) communications employing amplify-and-forward relaying under the influence of atmospheric turbulence. We present new results for the bit error rate (BER) performance for seven possible turbulence network scenarios for relay-assisted FSO link and validate them with numerical simulations based on Gamma-Gamma turbulence model showing a good agreement between them. We also show results, which elucidate the impact of non-homogeneous turbulence along the entire transmission link span for the multiple-hop relay-assisted FSO system. More specifically we show that the BER performance considerably deteriorates for the case where turbulence is near to the receiver end. We outline that for a target BER of 10−4 the signal-to-noise ratio penalty can be as high as 9dB compared to the case with no turbulence.