Title :
Nonlinear thermal sensitivity of a long-period grating
Author :
Costa, Rita Zanlorensi Visneck ; Kamikawachi, Ricardo Canute ; Possetti, Gustavo Rafael Collere ; Muller, Marcia ; Fabris, José Luís
Author_Institution :
Fed. Univ. of Technol., Curitiba
fDate :
Oct. 29 2007-Nov. 1 2007
Abstract :
This work shows the thermal sensitivity of a long period grating immersed in six different external media, with refractive indices ranging from 1.0000 to 1.4315, corresponding to air, water, ethanol, thinner, turpentine and kerosene. Changes of thermal sensitivity from negative to positive values were quantified, with behaviors transitioning from linear to nonlinear, depending on the refractive index of surroundings. Values for grating refractive index sensitivity and coupling thermo-optic coefficient are also determined.
Keywords :
diffraction gratings; fibre optic sensors; refractive index; sensitivity; thermo-optical effects; fiber sensors; long-period fiber grating; nonlinear thermal sensitivity; refractive index; thermo-optic coupling coefficient; Capacitive sensors; Fiber gratings; Optical attenuators; Optical fiber devices; Optical fiber sensors; Optical fiber theory; Optical recording; Optical refraction; Refractive index; Temperature sensors; Fiber gratings; fiber sensors; long period gratings; non-linear thermal sensitivity;
Conference_Titel :
Microwave and Optoelectronics Conference, 2007. IMOC 2007. SBMO/IEEE MTT-S International
Conference_Location :
Brazil
Print_ISBN :
978-1-4244-0661-6
Electronic_ISBN :
978-1-4244-0661-6
DOI :
10.1109/IMOC.2007.4404356
