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Proceedings Paper

Laser-self-mixing interferometric fiber strain sensor
Author(s): Angela Intermite; Bane Radisavljevic; Simona Ottonelli; Maurizio Dabbicco; Gaetano Scamarcio
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Paper Abstract

A new fiber strain sensor based on the Laser-Self-Mixing effect in Distributed Feedback Laser diodes is presented. Compared with existing fiber strain sensors based on Fiber Bragg Gratings, that are sensitive to local strain, our device achieves comparable sensitivity (~ 1 με) distributed along the whole fiber length and requires a much simpler electronics. The sensor is based on the interferometric principle of the laser-self-mixing in the moderate feedback regime, whereby the fiber strain results in a variation of the optical path-length seen by the radiation reflected by the end facet of the fiber itself. Increasing or decreasing strain recognition is directly provided by the sign of the sawtooth-like fringes derivative.

Paper Details

Date Published: 18 May 2009
PDF: 5 pages
Proc. SPIE 7356, Optical Sensors 2009, 735608 (18 May 2009); doi: 10.1117/12.820338
Show Author Affiliations
Angela Intermite, CNR-INFM Lab. Regionale LIT3 (Italy)
Univ. degli Studi di Bari (Italy)
Bane Radisavljevic, CNR-INFM Lab. Regionale LIT3 (Italy)
Univ. degli Studi di Bari (Italy)
Simona Ottonelli, CNR-INFM Lab. Regionale LIT3 (Italy)
Univ. degli Studi di Bari (Italy)
Maurizio Dabbicco, CNR-INFM Lab. Regionale LIT3 (Italy)
Univ. degli Studi di Bari (Italy)
Gaetano Scamarcio, CNR-INFM Lab. Regionale LIT3 (Italy)
Univ. degli Studi di Bari (Italy)


Published in SPIE Proceedings Vol. 7356:
Optical Sensors 2009
Francesco Baldini; Jiri Homola; Robert A. Lieberman, Editor(s)

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