Title :
Multi-element Bragg-grating based fibre-laser strain sensor
Author :
Kersey, A.D. ; Morey, W.W.
Author_Institution :
US Naval Res. Lab., Washington, DC, USA
fDate :
5/27/1993 12:00:00 AM
Abstract :
A fibre laser configuration is described which uses multiple fibre Bragg grating sensors as feedback elements. By tuning a wavelength selective filter located within the laser cavity over the gain bandwidth, the laser selectively lases at each of the Bragg wavelengths of the sensors, thus allowing strain induced shifts in the Bragg wavelengths to be monitored. A four sensor system is reported.
Keywords :
diffraction gratings; feedback; fibre lasers; fibre optic sensors; measurement by laser beam; strain measurement; tuning; Bragg wavelengths; feedback elements; fibre-laser strain sensor; four sensor system; laser cavity; multiple fibre Bragg grating; optical fibre; strain induced shifts; tuning; wavelength selective filter;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19930642
