Orthogonal modulation enabled OAM-VLC supported system incorporating multicolor lasers and multicast overlay
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Ravinder Singh
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Ajay Kumar Mahajan
Abstract
The concept of orbital angular momentum (OAM), often known as “twisted light,” has attracted a lot of attention in recent years due to its potential utilization in fiber-based and free-space (fiberless) optical communication systems. Despite the lack of research on Red/Green/Blue laser diodes (RGB LDs) combined with OAM, this new strategy has tremendous potential for improving visible light communication (VLC). This study introduces a 9 × 10 Gbps VLC system that combines RGB LDs with OAM beams using orthogonal modulation. Laguerre–Gaussian (LG) modes LG0,0, LG14,0, and LG40,0 are the three OAM beams that are used in the proposed arrangement. Differential phase shift keying (DPSK) is employed to perform multicast data transfer at the rate of 20 Gbps. This study compares the Log BER performance of unicast polarization shift keying (PolSK), multicast DPSK, and unicast nonreturn-to-zero (NRZ) schemes across different VLC transmission ranges. Results revealed that the combination of LG0,0 and RED-LDs offered enhanced bit error rates (BER) as compared to higher order OAM beams. The proposed system can successfully covered ≥1.3 m VLC link within the acceptable BER limits (≯10−9).
Acknowledgments
Ravinder Singh has simulated the system, and Dr. Ajay Kumar Mahajan has written the article.
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Research ethics: There are no conflicts of interests.
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Informed consent: Not applicable.
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Author contributions: (for double-anonymized journals: please use initials) Ravinder Singh has simulated the system, and Dr. Ajay Kumar Mahajan has written the article.
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Use of Large Language Models, AI and Machine Learning Tools: No.
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Conflict of interest: There are no conflicts of interests.
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Research funding: There is no funding.
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Data availability: No data of this paper is associated with any library.
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