Distributed force-sensing optical fiber using forward time-division multiplexing

Marcos Kleinerman; Peter W. Kelleher

doi:10.1117/12.56508

1 January 1992 Distributed force-sensing optical fiber using forward time-division multiplexing

Marcos Kleinerman, Peter W. Kelleher

Proceedings Volume 1586, Distributed and Multiplexed Fiber Optic Sensors; (1992) https://doi.org/10.1117/12.56508
Event: OE Fiber, 1991, Boston, MA, United States

Abstract

A new optical fiber capable of sensing distributed forces along its continuous length comprises a small central core and a noncontiguous second light-guiding region of longer optical path length. When interrogated with sufficiently short light pulses launched into the central core at the fiber launch end, mechanical forces acting at different points along the fiber cause the deflection of a fraction of the intensity of the interrogating light pulses propagating along the fiber at each point from the central core to the second light-guiding region, where they generate positive pulsed light signals reaching the fiber distal end separated in the time domain from the interrogating light pulses and from the signals generated at other sensing points along the fiber, and with an intensity several order of magnitude stronger than that of Rayleigh- backscatter signals. In addition to its potential use as a distributed force sensor, the fiber could serve as a telecommunications line allowing the noninvasive coupling of information at many points, simultaneously or in any arbitrary sequence, without the need for time-sharing protocols.

Citation Download Citation

Marcos Kleinerman and Peter W. Kelleher "Distributed force-sensing optical fiber using forward time-division multiplexing", Proc. SPIE 1586, Distributed and Multiplexed Fiber Optic Sensors, (1 January 1992); https://doi.org/10.1117/12.56508

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