Title :
A passive wavelength demodulation system for guided-wave Bragg grating sensors
Author :
Melle, Serge M. ; Liu, Kexing ; Measures, Raymond M.
Author_Institution :
Inst. for Aerosp. Studies, Toronto Univ., Ont., Canada
fDate :
5/1/1992 12:00:00 AM
Abstract :
A novel, passive, and self-referencing wavelength detection system (WDS) that measures the wavelength of the narrowband back-reflected spectrum of guided-wave Bragg gratings is described. This letter also reports on the use of such a detection system with fiber-optic Bragg gratings used as absolute strain sensors. The wavelength detection system demonstrated a 1% strain resolution of the total strain measurement range.<>
Keywords :
demodulation; diffraction gratings; fibre optic sensors; integrated optics; optical modulation; optical waveguides; strain gauges; absolute strain sensors; fiber-optic Bragg gratings; fibre couplers; guided-wave Bragg grating sensors; narrowband back-reflected spectrum; optical filters; passive wavelength demodulation system; self-referencing wavelength detection system; strain resolution; total strain measurement range; Bragg gratings; Capacitive sensors; Demodulation; Fiber gratings; Filters; Narrowband; Optical fibers; Sensor systems; Strain measurement; Wavelength measurement;
Journal_Title :
Photonics Technology Letters, IEEE
