High refractive index and temperature sensitivity LPGs for high temperature operation

I. M. Nascimento; C. Gouveia; Surnimal Jana; Susanta Bera; J. M. Baptista; Paulo Moreira; Palas Biwas; Somnath Bandyopadhyay; Pedro A. S. Jorge

doi:10.1117/12.2027573

18 November 2013 High refractive index and temperature sensitivity LPGs for high temperature operation

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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Proceedings Volume 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications; 8785FE (2013) https://doi.org/10.1117/12.2027573
Event: 8th Ibero American Optics Meeting/11th Latin American Meeting on Optics, Lasers, and Applications, 2013, Porto, Portugal

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.

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I. M. Nascimento, C. Gouveia, Surnimal Jana, Susanta Bera, J. M. Baptista, Paulo Moreira, Palas Biwas, Somnath Bandyopadhyay, and Pedro A. S. Jorge "High refractive index and temperature sensitivity LPGs for high temperature operation", Proc. SPIE 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications, 8785FE (18 November 2013); https://doi.org/10.1117/12.2027573

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