Implementation of Pressure Sensor of Optical Fiber Using Optical Interferometer

Abstract

In present work, two types of Interferometric Fiber Optic Sensor (Fabry – Perot & Modal Sensor) have been demonstrate and investigated. The main parameter studied of this contribute is the sensitivity, the strain could be induced by make a stress on the optical fiber. The strain effect at the fiber due to variation of the intensity in the output of the optical fiber. Then, the modes of electromagnetic waves that propagate in the fiber could be analyzed to determine the sensitivity depend on fringe rates. I conclude from this study the Extrinsic Fabry – Perot Interferometry structure is more sensitive than Modal Sensor.

Hydrogel-integrated optical fiber sensors and their applications: a comprehensive review

“…Interferometry-based fiber optic sensors involving hydrogels have experienced rapid growth due to their highly accurate measurements in various fields to sense physical phenomena such as temperature, pressure, pH, and curvature. [248][249][250][251] A novel optical fiber sensor with a spherical sensing region was developed utilizing the Fabry-Perot interferometric technique for examining the swelling degrees in different salt solutions using acrylamide-integrated hydrogels with the cationic monomer N-(3-dimethylaminopropyl) acrylamide. 252 A similar methodology also has been utilized for pH sensing; 252,253 however, maintaining a spherical shape while cross-linking brought difficulty in the fabrication process.…”