Chalcogenide Glass-Capped Fiber-Optic Sensor for Real-Time Temperature Monitoring in Extreme Environments

Bahareh Badamchi, Al-Amin Ahmed Simon, Maria Mitkova, Harish Subbaraman

Research output: Contribution to journalArticlepeer-review

Abstract

We demonstrate a novel chalcogenide glass (ChG)-capped optical fiber temperature sensor capable of operating within harsh environment. The sensor architecture utilizes the heat-induced phase change (amorphous-to-crystalline) property of ChGs, which rapidly (80–100 ns) changes the optical properties of the material. The sensor response to temperature variation around the phase change of the ChG cap at the tip of the fiber provides abrupt changes in the reflected power intensity. This temperature is indicative of the temperature at the sensing node. We present the sensing performance of six different compositions of ChGs and a method to interpret the temperature profile between 440 °C and 600 °C in real-time using an array structure. The unique radiationhardness property of ChGs makes the devices compatible with high-temperature and high-radiation environments, such as monitoring the cladding temperature of Light Water (LWR) or Sodium-cooled Fast (SFR) reactors.

Original languageAmerican English
JournalElectrical and Computer Engineering Faculty Publications and Presentations
StatePublished - 1 Mar 2021

Keywords

  • chalcogenide glass
  • optical fiber
  • temperature sensor

EGS Disciplines

  • Electrical and Computer Engineering

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