Study of Optical Fiber Sensors for Cryogenic Temperature Measurements

• Published in: Sensors (Basel, Switzerland) Vol. 17; no. 12; p. 2773
• Main Authors: De Miguel-Soto, Veronica, Leandro, Daniel, Lopez-Aldaba, Aitor, Beato-López, Juan Jesus, Pérez-Landazábal, José Ignacio, Auguste, Jean-Louis, Jamier, Raphael, Roy, Philippe, Lopez-Amo, Manuel
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 30-11-2017; MDPI
• Subjects: Backscattering; Cryogenic engineering; Cryogenic temperature; Crystal fibers; Fiber lasers; Interferometers; interferometric sensor; optical backscatter reflectometer; optical fiber sensor; Optical fibers; Optics; Photonic crystals; Physics; random distributed feedback fiber lasers; Sensors; thermometry; optical backscatter reflectometer; cryogenic temperature; optical fiber sensor; random distributed feedback fiber lasers; thermometry; interferometric sensor
• ISSN: 1424-8220; 1424-8220
• DOI: 10.3390/s17122773

In this work, the performance of five different fiber optic sensors at cryogenic temperatures has been analyzed. A photonic crystal fiber Fabry-Pérot interferometer, two Sagnac interferometers, a commercial fiber Bragg grating (FBG), and a π-phase shifted fiber Bragg grating interrogated in a random distributed feedback fiber laser have been studied. Their sensitivities and resolutions as sensors for cryogenic temperatures have been compared regarding their advantages and disadvantages. Additionally, the results have been compared with the given by a commercial optical backscatter reflectometer that allowed for distributed temperature measurements of a single mode fiber.