CGCRI Central Glass and Ceramics Research Institute

Kolkata, India

CGCRI Central Glass and Ceramics Research Institute

Kolkata, India
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Nascimento I.M.,INESC Porto | Nascimento I.M.,University of Porto | Gouveia C.,INESC Porto | Gouveia C.,University of Madeira | And 8 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2013

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. © 2013 SPIE.

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