10-W power light co-transmission with optically carried 5G NR signal over standard single-mode fiber

Abstract

Efficient co-transmission of 10-W power light and optically carried 5G new radio (NR) signal over standard single-mode fiber (SSMF) is experimentally demonstrated, with an optical power transmission efficiency (OPTE) of power light up to 71.8%. This efficiency record is enabled by carefully manipulating the linewidth of the power light and appropriately adjusting the wavelength spacing between the power light and 5G NR optical signal to effectively mitigate the nonlinear effect arising in the SSMF. In the experiment, the optically carried 5G NR 64-level quadrature amplitude modulation orthogonal frequency division multiplexing signal at 1550 nm, with a data rate of 1.5 Gbit/s, is successfully co-propagated with 10-W power light at 1064 nm over 1-km SSMF. The error-vector magnitude (EVM) is 0.48% under a received electrical power of − 25 d B m . In comparison with back-to-back transmission, only slight EVM degradation of 0.02% is observed, showing that the 5G NR optical signal is almost unaffected by the existence of power light. Moreover, the power fluctuation of the collected power light is less than 0.2% over 6 h, while the EVM fluctuation is smaller than 0.01% within 30 min. Our scheme is promising to realize an optically powered remote antenna unit through the existing 5G fronthaul SSMF link.

Power-over-Fiber with Simultaneous Transmission of Optical Carrier for a High Frequency Analog Signal over Standard Single-Mode Fiber

“…Electrical power up to 350 mW (5 V, 70 mA) was obtained from a multi-junction silicon photocell, resulting in an optical transmission efficiency of about 70% and a photocell efficiency of 25%. These results are comparable to previous results of simultaneous transmission of 1064.8 nm high-power light and 1550 nm 5G NR 64QAMOFDM optical signal over 1 km single-mode fiber [13]. Note that for a given power delivery distance, there is an optimum wavelength with maximum transmission efficiency, which is a compromise between optical fiber loss, with a minimum at 1550 nm, and photovoltaic converter efficiency, which is inversely proportional to wavelength.…”

“…Over the years, the procedure of PoF transmission to RAUs based on double-clad fiber (DCF) [9], multi-mode fiber (MMF) [10], and multicore fiber (MCF) [11,12] have been demonstrated. Recently, optically powered RoF transmitting systems using a single mode fiber (SMF) have been demonstrated [6,7,13], which is of particular interest because the SMF is widely deploying in optical networks. Different wavelengths were used for the power transmission.…”

“…Different wavelengths were used for the power transmission. The shorter wavelength of 830 nm [6] provides higher photovoltaic conversion efficiency, which is inversely proportional to the wavelength, while the longer wavelength of 1064.8 nm [13] has lower losses in the optical fiber. The error-vector magnitude is usually used to describe an influence of high power light on optically carried information signals.…”

Power-Over-Fiber Using Double-Clad Fibers

“…Single-mode fibers (SMFs) are most commonly utilized in optical fiber communications and are widely used in PWoF [26]− [29]. While the small single-mode (SM) core provides a broadband transmission, the power density can easily increase, which greatly limits the transmittable optical power.…”

Power-Over-Fiber Impact and Chromatic-Induced Power Fading on 5G NR Signals in Analog RoF

“…For example, SMFs can be used to transmit high-power optical signals to feed some parts of 5G-NR ARoF networks, e.g., low power Remote Radio Heads (RRHs) or Radio Frequency (RF) amplifiers therein [6]. This technique is called Power over Fiber (PoF), and has been integrated with RoF transmission in C-RAN based on SMFs [7,8], Multicore Fibers (MCF) [9,10,11], Multimode Fibers (MMF) [12,13], Double-Clad Fibers (DCF) [14], and in Plastic Optical Fiber (POF) for in homenetwork scenarios [15].…”