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.