Abstract
Using bundles of multimode optical fibers (MMF) as part of the 5G centralized radio access networks front-haul solutions for optically powering of low power consumption Remote Radio Heads (RRH) is proposed and experimentally demonstrated with 100 m of 200 μm core diameter MMF. From the 34.85 W electrical power provided to the system, 1.748 W are delivered to the load, giving an overall 5% efficiency, being the temperature controller of the High Power Lasers the most critical element. If intermediates results are considered, the efficiency from input optical power to electrical power after the PV cells is 43.4%. The RRH manages 2.34 W for control, battery charge, communications and the load operation. The system includes a low power bidirectional control channel that provides the capability of enabling different sleep modes and sending information about the status of the battery and sensing elements at RRH. The RRH has a minimum power consumption of 3.15 mW. Optimized design of different elements of the system are included. The system is tested by feeding a RF power amplifier at the RRH; providing a stable power supply and EVM performance below 17.8% with QPSK on a 20 GHz RF carrier.
Highlights
P OWER over fiber (PoF) is a good strategy for providing energy to remote points free of electromagnetic interference, with low weight, good galvanic isolation and with an easy integration in the infrastructure of telecommunication operators
In 5G C-radio access networks (RAN) deployments, PoF power can be sent in a dedicated fiber or can share the fiber by wavelength division multiplexing with the radio– over-fiber (RoF) signal, being called dedicated or shared scenarios [24], [28]
We successfully demonstrated a PoF system based on 100 m length 200 μm core diameter Multimode fibers (MMF) capable of delivering 1.748 W to a load
Summary
P OWER over fiber (PoF) is a good strategy for providing energy to remote points free of electromagnetic interference, with low weight, good galvanic isolation and with an easy integration in the infrastructure of telecommunication operators. It is important to reduce their power consumption as well as costs of installation, operation and maintenance In this way, PoF can simultaneously transmit optical data and power in the optical fiber. LÓPEZ CARDONA et al.: OPTICALLY FEEDING 1.75 W WITH 100 M MMF IN EFFICIENT C-RAN FRONT-HAULS WITH SLEEP MODES simple and cost effective installations of RAUs, considering the cost of installing electrical equipment and wiring from nearby power lines in addition to installing communication equipment; apart from minimizing the impact of power outages by using PoF. We propose a 100 m PoF system capable of delivering 1.748 W to a load that can reduce the overall power consumption by controlling and using different sleep mode configurations in an ARoF fronthaul scenario where it is experimentally tested.
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