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Proceedings Paper

High refractive index and temperature sensitivity LPGs for high temperature operation
Author(s): I. M. Nascimento; C. Gouveia; Surnimal Jana; Susanta Bera; J. M. Baptista; Paulo Moreira; Palas Biwas; Somnath Bandyopadhyay; Pedro A. S. Jorge
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Paper Abstract

A fiber optic sensor for high sensitivity refractive index and temperature measurement able to withstand temperature up to 450 °C is reported. Two identical LPG gratings were fabricated, whereas one was coated with a high refractive index (~1.78) sol-gel thin film in order to increase its sensitivity to the external refractive index. The two sensors were characterized and compared in refractive index and temperature. Sensitivities of 1063 nm/RIU (1.338 – 1.348) and 260 pm/°C were achieved for refractive index and temperature, respectively.

Paper Details

Date Published: 18 November 2013
PDF: 5 pages
Proc. SPIE 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications, 8785FE (18 November 2013); doi: 10.1117/12.2027573
Show Author Affiliations
I. M. Nascimento, INESC Porto (Portugal)
Univ. do Porto (Portugal)
C. Gouveia, INESC Porto (Portugal)
Univ. da Madeira (Portugal)
Surnimal Jana, Central Glass and Ceramic Research Institute (India)
Susanta Bera, Central Glass and Ceramic Research Institute (India)
J. M. Baptista, INESC Porto (Portugal)
Univ. da Madeira (Portugal)
Paulo Moreira, INESC Porto (Portugal)
Palas Biwas, Central Glass and Ceramic Research Institute (India)
Somnath Bandyopadhyay, Central Glass and Ceramic Research Institute (India)
Pedro A. S. Jorge, INESC Porto (Portugal)


Published in SPIE Proceedings Vol. 8785:
8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications
Manuel Filipe P. C. Martins Costa, Editor(s)

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