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Homodyne detection based multiple-beam WDM FSO communication system under various environmental conditions

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Abstract

The utilization of Free Space Optical (FSO) systems in upcoming 5G or beyond systems is appealing due to its secure transmission, unlicensed spectrum, and higher information rate. Despite the various advantages of the FSO system, long-range communication transmission is inadequate because the effectiveness of FSO systems is significantly impaired by environmental phenomena such as scintillation, fog, haze, and rain. This research intends to improve the FSO module's effectiveness in terms of channel capacity and long-range communication. The present research has employed a hybrid technique that integrates multiple-beam, Erbium-doped fiber amplifier amplification and Homodyne detection methodologies within a wavelength division multiplexing FSO system to achieve the desired outcome. The channel model employed in this study is the Gamma–Gamma model, and the framework is evaluated using various strategies including single beam (SB1 × 1), four beams (MB4 × 4), and eight beams (MB8 × 8). The findings indicate that optimal performance has been achieved through the utilization of MB8 × 8. A channel capacity of 320 Gb/s has been observed across a range of 1.6–12 km, with variations in transmission distance attributed to external environmental factors. The link effectiveness is evaluated through the calculation of the Bit Error Rate, Q factor and Eye Height analysis.

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  1. Department of Electronics and Communication Engineering, Maulana Azad National Institute of Technology, Bhopal, Madhya Pradesh, India

    Yogesh Kumar Gupta & Aditya Goel

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  1. Yogesh Kumar Gupta
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  2. Aditya Goel
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Yogesh Kumar Gupta: Conception and design, Manuscript preparation. Aditya Goel: Supervision and final approval.

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Gupta, Y.K., Goel, A. Homodyne detection based multiple-beam WDM FSO communication system under various environmental conditions. Opt Quant Electron 56, 388 (2024). https://doi.org/10.1007/s11082-023-05835-0

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