Keywords
Fiber optics, Optical detectors
Abstract
A fiber optic fluid level sensor based on light transmission attenuation due to bending losses is designed, built and tested.
Fibers formed with reverse curvatures of decreasing radii will induce and increasing amount of lower order mode light loss to the cladding as the light propagates along the step index multimode fiber. The sensor is arranged in the fluid in a vertical position such that the light travels along the fiber from the bottom or low fluid point to the top or full point. As the fluid covers increasing lengths of the exposed fiber, it strips even more power from the cladding (assuming the fluid refractive index is greater than the cladding refractive index). Data taken with a sensor of this configuration show a monotonic decrease of the output intensity as a function of increasing fluid level. As much as a 14 dB change occurs over a one-foot fluid level change. A mathematical model, based on both field theory and geometrical optics, is developed to evaluate and predict the performance of this fiber optic fluid level sensor. Comparisons of the theoretical predictions and the experimental results under laboratory conditions show very good agreement.
Notes
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Graduation Date
1985
Semester
Fall
Advisor
Belkerdid, Madjid A.
Degree
Master of Science (M.S.)
College
College of Engineering
Department
Engineering
Degree Program
Engineering
Format
Language
English
Rights
Public Domain
Length of Campus-only Access
None
Access Status
Masters Thesis (Open Access)
Identifier
DP0017014
STARS Citation
Ghandeharioun, Navid, "Fiber Optic Fluid Level Sensor" (1985). Retrospective Theses and Dissertations. 4767.
https://stars.library.ucf.edu/rtd/4767
Contributor (Linked data)
Madjid A. Belkerdid (Q57743535)
University of Central Florida. College of Engineering [VIAF]
Accessibility Status
Searchable text