Light-Fidelity Technology

Light Fidelity (Li-Fi) is an emerging wireless communica-tion technology that utilizes visible light high-speed data transmission, offering an efficient alternative to conventional radio frequency systems. This research presents the design and implementation of a Li-Fi-based audio communication system using both LED and Laser as optical transmitters. [1] The study focuses on a comparative analysis of these two light sources in terms of transmission range, signal strength, direc-tionality, and overall performance. The system converts audio signals into modulated light, which is transmitted through LED and Laser sources and received by a solar cell, then amplified and reproduced via a speaker. Experimental results demonstrate that LEDs provide wider coverage with moderate signal strength, whereas lasers offer long-distance, focused transmission with improved directionality.

Li-Fi, Visible Light Communication (VLC), Au-dio Transmission, Photodiode, Wireless Technology

1. K. Ahangama, H. P. Haripriya Premachandra, ., “Enhanced Visible Light Communication for Real-Time Audio With Interference-Resilient Protocols,” IEEE Access, 2025. [Google Scholar] [Crossref]

2. N., P. R. M., Impana B., Anusha Kumari, & S. Biradar, “Underwater Audio and Data Transmission System using Li-Fi Technology,” *Journal of Network Security & Computer Networks*, vol. 10, no. 1, pp. 1–10, 2024. [Google Scholar] [Crossref]

3. P. Surya Kumar, P. Supraja, and I. Mamatha, “Secured Audio Com-munication Through Light,” in *Digital Communication and Soft Com-puting Approaches Towards Sustainable Energy Developments (ISSETA 2023)*, Springer, pp. 35-45, 2024. [Google Scholar] [Crossref]

4. M. A. R. Eltokhy, M. Abdel-Hady, A. Haggag, et al., “Audio SIMO System Based on Visible Light Communication using Cavity LEDs,” [Google Scholar] [Crossref]

5. *Multimedia Tools and Applications*, vol. 82, pp. 46371-46385, 2023. [Google Scholar] [Crossref]

6. K. A. K. S. Surasinghe & Y. A. A. Kumarayapa, “Low Cost LED Source Based Transmission System for Achieving Free-Space Li-Fi Multimedia Communication,” *International Journal of Research & Scientific Innovation*, no. 1106051, 2024. [Google Scholar] [Crossref]

7. H. Haas, ”Wireless data from every light bulb,” TED Global, Edinburgh, UK, Jul. 2011, [Google Scholar] [Crossref]

8. S. Rajagopal, R. D. Roberts, and S. K. Lim, ”IEEE 802.15.7 visible light communication: modulation schemes and dimming support,” IEEE Communications Magazine, vol. 50, no. 3, pp. 72–82, Mar. 2022 [Google Scholar] [Crossref]

• Block-Based Programming for Education: A Comprehensive Analysis of Visual Programming Environments in K-12 Learning
• Management of Academic Libraries and Client Satisfaction Towards Digital Utilization: Basis for Monitoring Library Operations in SOCCSKSARGEN Region.
• Revenue Leakages in TPA Insurance Claims and Corporate Claims: An Institutional Overview of Aster Prime Hospital, Hyderabad
• Technology and Innovation in Hospitality and Tourism: A Management Perspective
• Geospatial Distribution of Tarok Sacred Grove of Langtang North and Langtang South Local Government Areas