Work

Real-time distributed fiber microphone based on phase-OTDR

Year: 2016

Type: article

Abstract: The use of an optical fiber as a real-time distributed microphone is demonstrated employing a phase-OTDR with direct detection. The method comprises a sample-and-hold circuit capable of both tuning the receiver to an arbitrary section of the fiber considered of interest and to recover in real-time the detected acoustic wave. The system allows listening to the sound of a sinusoidal disturbance with variable frequency, music and human voice with ~60 cm of spatial resolution through a 300 m long optical fiber.

Source: Optics Express

DOI: 10.1364/oe.24.029597

Authors: Carolina Franciscangelis, Walter Margulis, Leif Kjellberg, Ingemar Soderquist, Fabiano Fruett

Institution: Universidade Estadual de Campinas (UNICAMP)

Language: English

Topic: Advanced Fiber Optic Sensors

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funders: Conselho Nacional de Desenvolvimento Científico e Tecnológico, Vetenskapsrådet