title: Real-time distributed fiber microphone based on phase-OTDR.
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.
authors.forename: Carolina
authors.initials: C
authors.lastname: Franciscangelis
authors.forename: Walter
authors.initials: W
authors.lastname: Margulis
authors.forename: Leif
authors.initials: L
authors.lastname: Kjellberg
authors.forename: Ingemar
authors.initials: I
authors.lastname: Soderquist
authors.forename: Fabiano
authors.initials: F
authors.lastname: Fruett