Title :
Distributed feedback fiber laser sensor for hydrostatic pressure
Author :
Frank, A. ; Bohnert, K. ; Haroud, K. ; Brändle, H. ; Poulsen, C.V. ; Pedersen, J.E. ; Patscheider, J.
Author_Institution :
Corporate Res., ABB Switzerland Ltd., Baden, Switzerland
Abstract :
A polarimetric distributed feedback fiber laser sensor for the measurement of fluid pressure up to 50 MPa is investigated between room temperature and 250/spl deg/C. The isotropic pressure acts directly on the fiber, which eliminates the need of a mechanical transducer. A pressure resolution of about 20 kPa (0.2 bar) is demonstrated. Furthermore, the protection of the silica fiber against deterioration by the fluid and the thermomechanical effects of various fiber coatings on the sensor response are studied.
Keywords :
distributed feedback lasers; fibre lasers; fibre optic sensors; pressure sensors; pressure transducers; 20 to 250 C; 50 MPa; distributed feedback fiber laser sensor; fiber coatings; hydrostatic pressure; pressure resolution; sensor response; thermomechanical effects; Distributed feedback devices; Fiber lasers; Laser feedback; Mechanical sensors; Optical fiber sensors; Pressure measurement; Protection; Silicon compounds; Temperature sensors; Transducers;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2003.819717
