Power over Fiber for Multi-User Optical Communication

Power over Fiber (PoF) is an emerging technology that enables simultaneous transmission of electrical power and high-speed optical signals through optical fibers. This work demonstrates a multi-user communication scenario utilizing two independent optical sources operating at 1550 nm. The sources are multiplexed into a single optical channel to emulate a Multi-Input Single-Output (MISO) communication system. The optical channel is split into two equal paths: one for electrical power monitoring and the other for signal communication. To facilitate signal detection and decoding, the Non-Orthogonal Multiple Access (NOMA) technique is employed, allowing multiple users to share the same time and bandwidth resources. This paper presents a proof-of-concept system, showcasing a PoF setup composed of off-the-shelf and low-efficiency components capable of delivering up to $168 \mu \mathrm{~W}$ of electrical power while maintaining high-quality multi-user data communication.