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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 26 — Sep. 10, 2012
  • pp: 6282–6289

Distributed liquid level sensors using self-heated optical fibers for cryogenic liquid management

Tong Chen, Qingqing Wang, Rongzhang Chen, Botao Zhang, Yuankun Lin, and Kevin P. Chen  »View Author Affiliations


Applied Optics, Vol. 51, Issue 26, pp. 6282-6289 (2012)
http://dx.doi.org/10.1364/AO.51.006282


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Abstract

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.

© 2012 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.5820) Instrumentation, measurement, and metrology : Scattering measurements
(120.6810) Instrumentation, measurement, and metrology : Thermal effects
(060.4005) Fiber optics and optical communications : Microstructured fibers

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: May 10, 2012
Revised Manuscript: August 4, 2012
Manuscript Accepted: August 6, 2012
Published: September 5, 2012

Citation
Tong Chen, Qingqing Wang, Rongzhang Chen, Botao Zhang, Yuankun Lin, and Kevin P. Chen, "Distributed liquid level sensors using self-heated optical fibers for cryogenic liquid management," Appl. Opt. 51, 6282-6289 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-26-6282


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