Enhanced Sensitivity of the FBG Temperature Sensor Based on the PbO-GeO$_{2}$-SiO$_{2}$ Glass Optical Fiber

Abstract

We developed and demonstrated a highly sensitive fiber Bragg grating (FBG) temperature sensor by using the PbO-GeO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> -SiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> glass optical fiber. Temperature sensitivity of the FBG sensor based on the PbO-GeO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> -SiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> glass optical fiber was about 40% improved to the 0.0173 nm/°C by the thermal expansion increase of the fiber.