Simultaneous measurement of multiparameters using a Sagnac interferometer with polarization maintaining side-hole fiber

• Type: Article in International Scientific Journal
• Date: 2008

Authors

Frazao, O (Author) Other; Silva, SO (Author) Other; Baptista, JM (Author) Other; Santos, JL (Author) FCUP; Statkiewicz Barabach, G (Author) Other; Urbanczyk, W (Author) Other; Wojcik, J (Author) Other

Journal

Title: Applied Optics

Vol. 47

Pages: 4841-4848

ISSN: 1559-128X

Publisher: Optical Society of America

Indexing

ISI Web of Knowledge - 84 Citations

Scopus - 99 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-003-W54

DOI: 10.1364/ao.47.004841

Abstract (EN): A Sagnac interferometer with a section of a polarization maintaining side-hole fiber for multiparameter measurement is proposed. The sensor was experimentally demonstrated to be sensitive to torsion, temperature, and longitudinal strain, simultaneously The birefringence in the investigated side-hole fiber is induced simultaneously by the elliptical shape of a germanium-doped core and by field overlap with the air holes surrounding the core. The latter effect is purely geometrical and causes high chromatic dispersion of the group birefringence in the long wavelength range, which results in a different period of spectral interference fringes. A different wavelength response is obtained for each interference fringe peak when the fiber is subjected to torsion, temperature, or longitudinal strain. A matrix equation for simultaneous measurement of the three parameters-torsion, temperature, and longitudinal strain-is also proposed. (C) 2008 Optical Society of America

Language: English

Type (Professor's evaluation): Scientific