Title :
Dynamic range enhancement in fiber Bragg grating sensors using a multimode laser diode
Author :
Moreira, P.J. ; Ferreira, L.A. ; Santos, J.L. ; Farahi, F.
Author_Institution :
Unidade de Technol. Optoelectron. e Electron., INESC, Porto, Portugal
fDate :
6/1/1999 12:00:00 AM
Abstract :
A signal processing scheme for fiber Bragg grating sensors based on the utilization of adjacent modes of a multimode laser diode light source is demonstrated which allows high sensitivity to be obtained over a large measurement range. For strain measurements, a range of 4800 μ/spl epsi/ is achieved with a resolution of 0.08 μ/spl epsi//Hz, yielding a dynamic range of 95 dB.
Keywords :
Bragg gratings; fibre optic sensors; measurement by laser beam; optical information processing; semiconductor lasers; sensitivity; strain measurement; adjacent modes; dynamic range; dynamic range enhancement; fiber Bragg grating sensors; high sensitivity; large measurement range; multimode laser diode; multimode laser diode light source; resolution; signal processing scheme; train measurements; Bragg gratings; Diode lasers; Dynamic range; Fiber gratings; Optical fiber filters; Optical fiber sensors; Optical interferometry; Optical sensors; Sensor phenomena and characterization; Wavelength measurement;
Journal_Title :
Photonics Technology Letters, IEEE
