OPTICAL DATA TRANSMISSION AND WIRELESS COMMUNICATION METHODS: PRINCIPLES, TECHNOLOGIES, APPLICATIONS, AND DEVELOPMENT TRENDS
Keywords:
optical communication, fiber optics, wireless communication, radio waves, microwave, infrared, free-space optics, modulation, 5G, 6G.Abstract
Modern communication networks rely on both optical and wireless
transmission technologies to satisfy rapidly increasing requirements for capacity,
mobility, reliability, and global coverage. Optical communication transfers
information by modulating light and transmitting it through optical fiber or free space,
while wireless communication uses electromagnetic waves to deliver information
without a physical cable. This article reviews the fundamental principles of optical data
transmission, fiber-optic components, total internal reflection, wavelength-division
multiplexing, free-space optical communication, and major wireless transmission
methods. Radio, microwave, infrared, cellular, Wi-Fi, and satellite technologies are
compared in terms of range, bandwidth, mobility, interference, and practical
applications. Key technical concepts including attenuation, dispersion, modulation,
multiplexing, line-of-sight propagation, signal-to-noise ratio, spectrum, and handover
are explained with diagrams. The article also discusses hybrid optical-wireless
networks, security, reliability, and future integration with 5G/6G systems.
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