Title :
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
fDate :
6/15/2008 12:00:00 AM
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;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2008.924181
