Title :
Photorefractive volume holographic demodulation of in-fiber Bragg grating sensors
Author :
James, S.W. ; Dockney, M.L. ; Tatam, R.P.
Author_Institution :
Center for Photonics & Opt. Eng., Cranfield Univ., Bedford, UK
fDate :
5/1/1996 12:00:00 AM
Abstract :
A demodulation scheme for an in-fiber Bragg grating sensor using a volume holographic filter formed in photorefractive BaTiO3 is proposed and demonstrated. A strain range of 2500 μstrain, with minimum detectable strain of 4 μstrain//spl radic/Hz, is measured. Extension of the technique to allow demodulation of arrays of sensors is discussed.
Keywords :
arrays; barium compounds; demodulation; demultiplexing; fibre optic sensors; holographic gratings; holographic optical elements; optical fibre filters; optical fibres; photorefractive materials; strain measurement; strain sensors; BaTiO/sub 3/; demodulation scheme; in-fiber Bragg grating sensors; minimum detectable strain; photorefractive volume holographic demodulation; sensor array demodulation; strain range; volume holographic filter; Bragg gratings; Demodulation; Diffraction gratings; Filter bank; Holography; Optical recording; Photorefractive materials; Sensor arrays; Wavelength measurement; Writing;
Journal_Title :
Photonics Technology Letters, IEEE
