Intermodal interferometer for strain and temperature sensing fabricated in birefringent boron doped microstructured fiber

• Type: Article in International Scientific Journal
• Date: 2011

Authors

Statkiewicz Barabach, G (Author) Other; Carvalho, JP (Author) Other; Frazao, O (Author) FCUP; Olszewski, J (Author) Other; Mergo, P (Author) Other; Santos, JL (Author) FCUP; Urbanczyk, W (Author) Other

Journal

Title: Applied Optics

Vol. 50

Pages: 3742-3749

ISSN: 1559-128X

Publisher: Optical Society of America

Indexing

ISI Web of Knowledge - 15 Citations

Scopus - 19 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-002-PMV

DOI: 10.1364/ao.50.003742

Abstract (EN): We present a compact in-line fiber interferometric sensor fabricated in a boron doped two-mode highly birefringent microstructured fiber using a CO2 laser. The intermodal interference arises at the fiber output due to coupling between the fundamental and the first order modes occurring at two fiber tapers distant by a few millimeters. The visibility of intermodal interference fringes is modulated by a polarimetric differential signal and varies in response to measurand changes. The proposed interferometer was tested for measurements of the strain and temperature, respectively, in the range of 20-700 degrees C and 0-17 mstrain. The sensitivity coefficients corresponding to fringe displacement and contrast variations are equal respectively for strain -2.51 nm/mstrain and -0.02561/mstrain and for temperature 16.7 pm/degrees C and 5.74 x 10(-5) 1/degrees C. This allows for simultaneous measurements of the two parameters by interrogation of the visibility and the displacement of interference fringes. (C) 2011 Optical Society of America

Language: English

Type (Professor's evaluation): Scientific