Realization of 32 × 4 × 40 Gbps PDM/MDM-FSO system using orbital angular momentum beams
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Vivek Arya
Abstract
A mode division multiplexing (MDM)-based free space optics (FSO) system is considered as a potential contender to offer an ultra-high capacity wireless connection. Also, polarization division multiplexing (PDM) technique is extensively used in an FSO system to tackle the costing issue in the multiservice providers’ scenario. Thus, a PDM/MDM-FSO system using orbital angular momentum (OAM) beams for 128 users is proposed to enhance the spectral efficiency as well system capacity. OAM [0, 0] and OAM [1, 0] modes are operated under the severe climate conditions. The results exhibit that the system offers maximum FSO range of 3,300 m at 32 × 4 × 40 Gbps transmission rate under very clear, light rain, and haze atmospheric conditions. Besides, for acceptable quality factor of value 6, received power of −16 to −13 dBm is obtained for all operating modes and polarization beams under very clear condition over 2,000 m range. It is also seen that maximum beam divergence of 4.3–7 mrad can be sustained with the polarized OAM beams. As compared to existing works, this work indicates best performance in terms of link capacity, spectral efficiency, and data rate.
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Research ethics: Not applicable.
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Informed consent: Not applicable.
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Author contributions: The author has accepted responsibility for the entire content of this manuscript and approved its submission.
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Use of Large Language Models, AI and Machine Learning Tools: None declared.
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Conflict of interest: The author states no conflict of interest.
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Research funding: None declared.
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Data availability: The raw data can be obtained on request from the corresponding author.
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