The Co-Transmission Technique of Signal and Power over 10 km Weakly-Coupled Seven-Core Fiber
With the rapidly increase of the construction density of 5G micro base stations,the traditional cable power supply mode will greatly increase the construction cost and layout difficulty of 5G network.The co-transmission technique of signal and power over optical fiber as a new power supply mode,uses optical fiber as the transmission medium and co-transmits 1 064 nm energy light and 1 550 nm signal light,which can not only meet the high-speed 5G signal fronthaul,but also meet the centralized energy management of 5G micro base station.In this paper,a co-transmission scheme of signal and power over optical fiber based on space division multiplexing technology is proposed.10 W energy light and 1.5 Gbit/s 5G new radio(NR)signal light are co-transmitted in the 10 km weakly-coupled seven-core fiber experiment.The 0.42 W electric power can be obtained by a photovoltaic converter with an optical-to-electrical conversion efficiency of 35％,which can drive a remote antenna unit(RAU).The fluctuation range of received optical power of energy light for 7 hours continu-ous monitoring is less than 0.4％.Meanwhile,the error vector amplitude value(EVM)of the received 5G NR signal is only 0.38％,achieving a record 6.3 W(Gbit/s)·km electric power-capacity-distance product.
space division multiplexing5G fronthaulhigh power lasersignal and power-over-fiber
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