Temperature- and strain-independent torsion sensor using a fiber loop mirror based on suspended twin-core fiber

• Type: Article in International Scientific Journal
• Date: 2010

Authors

O. Frazao (Author) FCUP; R.M. Silva (Author) Other; J. Kobelke (Author) FCUP; K. Schuster (Author) FCUP

Journal

Title: Optics Letters

Vol. 35 No. 16

Pages: 2777-2779

ISSN: 0146-9592

Publisher: Optical Society of America

Indexing

ISI Web of Science

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Abstract (EN): In this Letter, we present a fiber loop mirror configuration based on a suspended twin-core fiber for sensing applications. Using the suspended twin-core fiber, the fringe pattern is due to the differential optical patch of the light in the two cores associated with a refractive index difference of similar to 10(-3), which indicates an advantage of this approach compared with those based on high-birefringent fibers, namely, the possibility of using a small length of fiber. The sensing configuration was characterized for torsion, temperature, and strain. Using the fast Fourier transform technique, it is possible to obtain measurand-induced amplitude variations of the fringe pattern. The results obtained indicate the viability of a temperature- and strain-independent torsion sensor.

Language: English

Type (Professor's evaluation): Scientific