Title :
Dual wavelength fibre interferometer with wavelength selection via fibre Bragg grating elements
Author :
Kersey, A.D. ; Berkoff, T.A.
Author_Institution :
US Naval Res. Lab., Washington, DC, USA
fDate :
6/18/1992 12:00:00 AM
Abstract :
The use of intra-core fibre gratings to provide the selection of two stable, closely spaced wavelength-components at the output of a fibre interferometer is reported. An unambiguous sensing range in the optical path difference of an interferometer of +or-0.49 mm is demonstrated using two gratings spaced by 2.5 nm.
Keywords :
diffraction gratings; fibre optic sensors; light interferometers; Mach Zehnder interferometer; dual wavelength fibre interferometer; fibre Bragg grating elements; intra-core fibre gratings; optical path difference; strain detection; unambiguous sensing range; wavelength selection;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19920767
