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Asian Journal of Physics Vol 31, Nos 9 – 10 (2022) 999-1004

Optical fiber Bragg Grating in self-focusing control and pH sensor

Lorenzo Dinia1, Fabio Mangini1, Darren Hayes2 and, Fabrizio Frezza1
1Department of Information Engineering, Electronics and Telecommunications, 
“La Sapienza” University of Rome, Via Eudossiana 18, 00184 Rome, Italy.
2Seidenberg School of Computer Science & Information Systems, Pace University, One Pace Plaza, New York, NY 10038, USA

The transmission of light through optical fibers continues to be a major focus for researchers. This study centers on optical fiber Bragg grating (FBG) constituted of cladding and core in two configurations, consequently, for two applications. These two systems contain a Bragg grating placed in the core center. The first optical fiber has FBG within the center of the core and its response is studied through a laser beam with a Gaussian shape propagating along the core. Since the fiber core has an intensity-dependent refractive index, the highest value will be reached at the center of fibers focusing the beam. This phenomenon is known as self-focusing. The integrated FBG aims to spatially influence the self-focusing effect. FBG in the second fiber optic sensor is combined with a pH-responsive polymer coating to monitor the pH of examined solutions. These two systems provide promising sensors for pH, strain, and temperature monitoring. The optical sensors arrangements are modeled through the Wave Optics Module in Comsol Multiphysics environment, which is based on the Finite Element Method (FEM) solver. © Anita Publications. All rights reserved.
Keywords: Holographic replay, 3D imaging, Image reconstruction, Sparse optimization.

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Method: Single- anonymous; Screened for Plagiarism? Yes
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