Strain and Temperature Discrimination Using High-Birefringence Erbium-Doped Fiber Loop Mirror With High Pump Power Laser

Author

Frazão, Orlando ; Egypto, Diogo ; Aragão-Bittencourt, Lucas ; Giraldi, Maria T M R ; Marques, Manuel B.

Author_Institution

INESC Porto, Porto

Volume

20

Issue

12

fYear

2008

fDate

6/15/2008 12:00:00 AM

Firstpage

1033

Lastpage

1035

Abstract

This work presents a method to tune the sensitivity of the sensor in a highly birefringent erbium-doped fiber loop mirror (FLM) when it is pumped. This concept was used for simultaneous measurement of strain and temperature. The FLM is sequentially pumped and unpumped by a high pump laser at 980 nm to change the erbium-doped fiber properties. The sensing head changes its sensitivity when subjected to strain and/or temperature variations due to thermal effects originated by the pump laser.

Keywords

erbium; fibre lasers; fibre optic sensors; laser mirrors; strain measurement; temperature measurement; high pump power laser; high-birefringence erbium-doped fiber loop mirror; optical fiber sensors; sensitivity; strain; temperature; thermal effects; wavelength 980 nm; Capacitive sensors; Erbium-doped fiber lasers; Laser excitation; Laser tuning; Mirrors; Optical fiber sensors; Power lasers; Pump lasers; Strain measurement; Temperature sensors; Erbium-doped fiber; fiber loop mirror (FLM); high pump laser; optical fiber sensors;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2008.924181

Filename

4529236