Journal
APPLIED OPTICS
Volume 51, Issue 26, Pages 6282-6289Publisher
OPTICAL SOC AMER
DOI: 10.1364/AO.51.006282
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Funding
- National Science Foundation [CMMI-0644681, CMMI-0900564, CMMI-1109971]
- Department of Energy [DE-FE0003859]
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1054652] Funding Source: National Science Foundation
- Div Of Industrial Innovation & Partnersh
- Directorate For Engineering [0956816] Funding Source: National Science Foundation
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We present a continuous liquid level sensing system for both room temperature and cryogenic fluids with millimeter spatial resolution. Change of in-fiber Rayleigh backscattering signal from the distinct thermal response of the heated sensing fiber in liquid and in air were interrogated and spatially resolved using the optical frequency domain reflectometry. Both electrical and optical heating techniques were investigated for cryogenic liquid applications at 4 K, 77 K, and the room temperature. The successful combination of self-heated fiber and wavelength-swept Rayleigh scattering interferometry provides, for the first time to our best knowledge, a truly distributed fuel gauge with high spatial resolution for cryogenic fuel storage, transportation, and management on ground and in space. (C) 2012 Optical Society of America
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