Sensitivity Enhancement in U-Shaped Evanescent Wave Fiber Sensor
Mohd Ashraf, Mainuddin Mainuddin, Mirza Tariq Beg, Fiza Moin, R. Rajesh, Gaurav Singhal
Abstract
In this article, sensitivity enhancement in U-shaped evanescent wave fiber optic sensor (EWFS) has been reported. The overall effect of surface roughness, material deformation, and probe geometry on the sensitivity of U-shaped fiber optic EWFS has been investigated. The experimental results of the developed sensors demonstrate that rough-surfaced fiber probe has <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\sim $ </tex-math></inline-formula> 7% enhancement in sensitivity compared with smooth fiber probes. Index Evanescent wave (EW), plastic optical fiber (POF), sensor, surface roughness, U-bent fiber.