Power-Over-Fiber and Distributed Acoustic Sensing Hybridization in Single Fiber Channel

The efficient and independent operation of power-over-fiber (PoF) and distributed acoustic sensing (DAS) has been demonstrated using standard single-mode fiber (SSMF). An optical power transmission efficiency (OPTE) of 6.67% and a transmission loss of ~1 dB/km were achieved over an 11.8 km fiber link, supporting both power delivery and distributed optical fiber sensing (DOFS). To minimize cross-talk, the system separates the power and sensing channels by an 88 THz bandwidth. In the experiment, the power and sensing light wavelengths are 1064 nm (continuous) and 1550 nm (pulsed), respectively. As the transmitted optical power increased from 0 W to 2.13 W, the DAS system successfully localized vibration sources with a resolution of 6.29 m and reconstructed phase information, confirming its ability to operate under high optical power. The reported scheme verifies the possibility of constructing the sensing-energy hybrid network based on a conventional optical fiber with the advantages of flexible layout and compatibility.