Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7929440 | Optics Communications | 2015 | 5 Pages |
Abstract
A method for precise measurement of the liquid-level by using a fiber loop ring-down technique incorporating a short section of etched fiber is proposed and experimentally demonstrated. The change of liquid-level is obtained by recording the ring-down time Ï of light in the fiber loop. The experimental results show that the liquid-level has a well defined linear relationship with the inverse of Ï over the range of 1 cm; the relative standard deviation of Ï is about 0.21% and correspondingly the least detectable liquid-level change is about 4 µm by using an etched fiber with diameter of 25.1 µm. Moreover, this method has low temperature cross-sensitivity when the refractive index of liquid is higher than that of the fiber cladding, so it can be employed for liquid-level measurement with high resolution.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Yajun Jiang, Wei Jiang, Biqiang Jiang, Abdul Rauf, Chuan Qin, Jianlin Zhao,