Title :
Elliptical-core two mode optical-fiber sensor implementation methods
Author :
Murphy, Kent A. ; Miller, Mark S. ; Vengsarkar, Ashish M. ; Claus, Richard O.
Author_Institution :
Bradley Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
fDate :
11/1/1990 12:00:00 AM
Abstract :
Experimental methods for the practical implementation of few-mode elliptical-core sensors are described. Techniques for desensitizing the lead-in and lead-out fibers are discussed, and results of a vibration sensor embedded in a graphite-epoxy composite are presented. A scheme using a single-mode elliptical-core fiber as the lead-in fiber and an offset circular-core single-mode fiber as the lead-out fiber is successfully implemented. Detection techniques for few-mode fiber sensors are reviewed, and a novel fringe-counting method to unambiguously detect the amplitude and direction of dynamic strain is reported
Keywords :
fibre optic sensors; vibration measurement; C; amplitude; desensitizing; direction; dynamic strain; elliptical core two mode optical fiber sensor; fringe-counting method; graphite fiber reinforced epoxy reson composite; implementation methods; lead in fibers; lead-out fibers; offset circular-core single-mode fiber; single-mode elliptical-core fiber; vibration sensor; Adaptive optics; Capacitive sensors; Intelligent sensors; Optical fiber couplers; Optical fiber devices; Optical fiber sensors; Optical filters; Optical interferometry; Optical sensors; Optical signal processing;
Journal_Title :
Lightwave Technology, Journal of
