Analysis of beam divergence on free space optical link using polarization shift keying technique

Malavika Rajeev; Geethu Anna Mathew; Prabu Krishnan

doi:10.1117/1.OE.58.4.046109

25 April 2019 Analysis of beam divergence on free space optical link using polarization shift keying technique

Malavika Rajeev, Geethu Anna Mathew, Prabu Krishnan

Author Affiliations +

Optical Engineering, Vol. 58, Issue 4, 046109 (April 2019). https://doi.org/10.1117/1.OE.58.4.046109

Abstract

Beam diverging is an indispensable phenomenon on the quality and bit error rate (BER) performance of the free space optical (FSO) communication system. The role of an efficacious modulation technique that mitigates the combined effect of beam diverging and atmospheric attenuation is highly relevant. The weak depolarizing property of the atmosphere advances the use of polarization shift keying (PolSK) modulation. We are subjected to investigate the quality and feasibility of the communication link, considering the impact of beam divergence on the PolSK modulation under various weather conditions. It is shown that PolSK subdues the effects of increase in beam divergence, attenuation factor, and further extends the communication range. A comparison with on off keying and PolSK-based FSO links considering the divergence angle is discussed. Moreover, BER and quality factor graphs are plotted against link distance and beam divergence using PolSK, which improves the performance analysis.

Citation Download Citation

Malavika Rajeev, Geethu Anna Mathew, and Prabu Krishnan "Analysis of beam divergence on free space optical link using polarization shift keying technique," Optical Engineering 58(4), 046109 (25 April 2019). https://doi.org/10.1117/1.OE.58.4.046109

Received: 14 December 2018; Accepted: 28 March 2019; Published: 25 April 2019

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