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Optics Letters

Optics Letters


  • Vol. 30, Iss. 6 — Mar. 15, 2005
  • pp: 601–603

Two-loop-based low-coherence multiplexing fiber-optic sensor network with a Michelson optical path demodulator

Libo Yuan and Jun Yang  »View Author Affiliations

Optics Letters, Vol. 30, Issue 6, pp. 601-603 (2005)

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A two-loop-based low-coherence multiplexing fiber-optic sensor network is proposed and demonstrated. It greatly extends the multiplexing capacity of this kind of sensor. A practical implementation of this scheme uses a popular amplified spontaneous emission light source and standard single-mode fiber, which are commonly used in the communications industry. The sensor's two-loop topology is completely passive. Absolute length measurements can be obtained for each sensing fiber segment for use in measuring the quasi-distribution strain or temperature. For large-scale smart structures this technique not only extends the multiplexing potential but also provides a redundancy for the sensing system. This means that the two-loop sensor network can break down at several points and the sensing system will still work even if some of the embedded two-loop sensors have been destroyed. The robustness of the nine-sensor two-loop sensing network is investigated and discussed.

© 2005 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.4230) Fiber optics and optical communications : Multiplexing

Libo Yuan and Jun Yang, "Two-loop-based low-coherence multiplexing fiber-optic sensor network with a Michelson optical path demodulator," Opt. Lett. 30, 601-603 (2005)

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