Power-over-fiber and distributed acoustic sensing hybridization in single fiber channel

TL;DR

This paper demonstrates a hybrid system combining power-over-fiber and distributed acoustic sensing over a single fiber, achieving efficient power delivery and vibration sensing with minimal cross-talk, enabling flexible and low-cost sensing-energy networks.

Contribution

It introduces a novel hybrid system that integrates PoF and DAS in a single fiber channel with effective separation and high power operation capabilities.

Findings

Achieved 6.67% optical power transmission efficiency over 11.8 km fiber.

Successfully localized vibrations and reconstructed phase information at 2.13 W power.

Demonstrated low cross-talk separation using a 40 THz bandwidth.

Abstract

The efficient and independent operation of power-over-fiber (PoF) and distributed acoustic sensing (DAS) has been demonstrated using standard single-mode fiber (SSMF). A transmission optical power efficiency (OPTE) of 6.67% was 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 a 40 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 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 conventional optical fiber with the advantages of flexibility and low cost.