Title :
Application of correlation-based continuous-wave technique for fiber Brillouin sensing to measurement of strain distribution on a small size material
Author :
Tanaka, Masato ; Hotate, Kazuo
Author_Institution :
Tokyo Univ., Japan
fDate :
5/1/2002 12:00:00 AM
Abstract :
In this letter, we demonstrate a smart material using our technique utilizing correlation between pump-and-probe lightwaves for fiber optic distributed strain sensing with Brillouin scattering. This technique enables centimeter-order spatial resolution, which is 100 times higher than that in conventional pulsed-lightwave techniques. This letter describes verification of usefulness of the correlation-based continuous-wave technique for smart material applications. Strain distribution on the surface of a small ring is obtained with 1-cm spatial resolution.
Keywords :
distributed sensors; fibre optic sensors; intelligent sensors; intelligent structures; stimulated Brillouin scattering; strain sensors; correlation-based continuous-wave technique; fiber Brillouin sensing; fiber-optic distributed sensing; gain spectrum; pump-and-probe; pump-and-probe lightwaves; small size material; smart material; spatial resolution; strain distribution measurement; Acoustic pulses; Brillouin scattering; Capacitive sensors; Frequency modulation; Optical fiber sensors; Optical fibers; Optical materials; Pulse measurements; Spatial resolution; Strain measurement;
Journal_Title :
Photonics Technology Letters, IEEE
