Torsion sensor based on a figure-of-eight cavity fibre laser

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

Authors

Ferreira, MS (Author) Other; Santos, JL (Author) FCUP; Mergo, P (Author) Other; Frazao, O (Author) FCUP

Journal

Title: Laser Physics Letters

Vol. 10

Final page: 045105

ISSN: 1612-2011

Publisher: Institute of Physics Publishing

Indexing

ISI Web of Knowledge - 6 Citations

Scopus - 7 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-005-1X0

DOI: 10.1088/1612-2011/10/4/045105

Abstract (EN): A figure-of-eight based fibre laser cavity is proposed for the measurement of torsion. In one of the loops a section of photonic crystal fibre is inserted, acting both as an optical filter and the sensing head. The laser emission depends on the optical filter polarization and length. A single lasing band is achieved with a full width at half maximum of similar to 1.72 nm. The proposed sensor presents sensitivity to torsion of 7.13 pm/degree over a range of 180 degrees. This configuration can also be used to measure optical power variations. Besides, due to the properties of the optical filter this sensor presents low sensitivity to temperature.

Language: English

Type (Professor's evaluation): Scientific