Temperature-independent torsion sensor based on "figure-of-eight" fiber loop mirror

• Type: Article in International Scientific Journal
• Date: 2013

Authors

Silva, RM (Author) Other; Ribeiro, ABL (Author) Other; Frazao, O (Author) FCUP

Journal

Title: Photonic Sensors

Vol. 3

Pages: 52-56

ISSN: 1674-9251

Publisher: Springer Nature

Indexing

Scopus - 1 Citation

Other information

Authenticus ID: P-008-8NE

DOI: 10.1007/s13320-012-0082-3

Abstract (EN): An interrogation sensor system combining the "figure-of-eight" fiber loop mirror using a single directional 3×3 fiber optic coupler was proposed. One fiber loop mirror was formed by inserting a length of high birefringent optical fiber at the input ports of the 3×3 coupler. Splicing the output ports of the 3×3 coupler between them created the other fiber loop mirror. The introduction of this second loop gave rise to two polarization states of light with the same frequency but different optical phase. The mechanical torsion sensing head was located at the second loop and was exhibited an average modulus torsion sensitivity of 7.9×10-4 degree/dB. The performance of the sensor was not affected by environmental temperature variations. © 2012 The Author(s).

Language: English

Type (Professor's evaluation): Scientific