Ring fibre laser with interferometer based in long period grating for sensing applications

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

Authors

Frazao, O (Author) Other; Correia, C (Author) Other; Baptista, JM (Author) Other; Marques, MB (Author) FCUP; Santos, JL (Author) FCUP

Journal

Title: Optics Communications

Vol. 281

Pages: 5601-5604

ISSN: 0030-4018

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 5 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-003-TX7

DOI: 10.1016/j.optcom.2008.08.004

Abstract (EN): This work presents two distinct configurations based on phase-wavelength conversion using a ring fibre laser with two different long period gratings interferometer topologies. The sensors are interrogated by analysing the wavelength change of the emission laser, which is directly dependent on the interferometer phase change. The first configuration integrates a Mach-Zehnder interferometer, which is based on a pair of long period gratings and is used as sensing head for bending radius and longitudinal strain measurement. The second configuration, comprehends a Michelson interferometer, which is based on a single LPG and a fibre end mirror and is used as a liquid level sensor or as an optical refractometer.

Language: English

Type (Professor's evaluation): Scientific