Title :
Multiparameter Sensor Based on Single High-Order Fiber Bragg Grating Made With IR-Femtosecond Radiation in Single-Mode Fibers
Author :
Grobnic, Dan ; Mihailov, Stephen J. ; Smelser, Christopher W. ; Walker, Robert B.
Author_Institution :
Commun. Res. Centre Canada, Ottawa, ON
fDate :
7/1/2008 12:00:00 AM
Abstract :
Narrowband multiple high-order Bragg resonances from a single Bragg grating structure inscribed using a femtosecond IR laser and a 4.28 mum pitched phase mask are used to demonstrate a multiparameter sensor in standard low cutoff wavelength optical fiber. Six high reflectivity resonances that are observed in the wavelength range from 1 to 2 mum can be used to monitor up to six sensing parameters. Temperature and strain coefficients of the grating at each of the high-order Bragg resonances are evaluated.
Keywords :
Bragg gratings; fibre optic sensors; high-speed optical techniques; laser materials processing; optical fibre fabrication; phase shifting masks; strain measurement; strain sensors; temperature measurement; temperature sensors; IR-femtosecond radiation; femtosecond IR laser; grating temperature; multiparameter sensor; narrowband multiple high-order Bragg resonance; phase mask; single high-order fiber Bragg grating; single-mode fibers; strain coefficient; wavelength 1 mum to 2 mum; Bragg gratings; Fiber gratings; Fiber lasers; Infrared sensors; Laser beam cutting; Narrowband; Optical fiber sensors; Optical sensors; Resonance; Ultrafast optics; Bragg grating; high-order spectra; multiparameter sensing; sensor; strain; temperature; ultrafast optics;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2008.926186
