A. Minardo, E. Catalano, R. Vallifuoco, L. Zeni, R. Bernini, M. Caponero, A. Castaldo, G. de Marzi, A. Masi, C. Mazzotta, A. Polimadei
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Distributed cryogenic temperature sensing through Brillouin optical frequency-domain analysis
We present the results of an experimental campaign aimed at demonstrating the use of a distributed optical fiber sensor based on Brillouin scattering in static and dynamic temperature measurements at cryogenic temperatures (≈ 84 K). The experimental results, obtained through Brillouin Optical Frequency-Domain Analysis (BOFDA) at a spatial resolution of 16 mm, are compared with temperature measurements using thermocouples and fiber Bragg gratings. The distributed sensor is able to capture local temperature variations of ≈ 2 °C at an acquisition rate of 1 Hz.
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