A stress optical fiber sensor was manufactured and tested. It uses light coupling between two parallel and laterally fused, all-silica multimode optical fibers along a cladding length of a few centimeters. This sensor is dedicated to the measurement of high values of stress. A theoretical model was developed using the mode coupling and the perturbation theory to calculate the global coupling coefficient of light. A serial optical fiber sensor network interrogated by the time-division multiplexing method was realized and tested. The major applications of this sensor are control and monitoring of civil engineering structures and concretes.
© 1998 Optical Society of America
Rachid Gafsi, Pierre Lecoy, and Abdelrafik Malki, "Stress Optical Fiber Sensor Using Light Coupling Between Two Laterally Fused Multimode Optical Fibers," Appl. Opt. 37, 3417-3425 (1998)