Structural sensing using a fiber laser strain sensor

Serge Melle; Trenton G. Coroy; Shawn E. Karr; A. Tino Alavie; Raymond M. Measures

doi:10.1117/12.141327

26 March 1993 Structural sensing using a fiber laser strain sensor

Serge Melle, Trenton G. Coroy, Shawn E. Karr, A. Tino Alavie, Raymond M. Measures

Proceedings Volume 1798, Fiber Optic Smart Structures and Skins V; (1993) https://doi.org/10.1117/12.141327
Event: Fibers '92, 1992, Boston, MA, United States

Abstract

The development of a fiber laser sensor which permits efficient interrogation of Bragg grating sensors is reported. The fiber laser is linewidth-narrowed and tuned by a remotely located, sensing Bragg grating that is surface adhered to a structure under test. The Bragg grating- tuned fiber laser is used in conjunction with a passive wavelength demodulation system (WDS) to form a fiber laser strain sensor system (FLS³), which was used to track both static and dynamic strains on an aluminum beam. The FLS³ could measure strains with a resolution of approximately 4 (mu) (epsilon) and a bandwidth of 13.0 kHz. The viability of the laser strain sensor concept lends itself to the development of a compact, potentially embeddable smart sensor that would output demodulated sensing data directly to the user.

Citation Download Citation

Serge Melle, Trenton G. Coroy, Shawn E. Karr, A. Tino Alavie, and Raymond M. Measures "Structural sensing using a fiber laser strain sensor", Proc. SPIE 1798, Fiber Optic Smart Structures and Skins V, (26 March 1993); https://doi.org/10.1117/12.141327

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