23 August 2017 Fiber optic refractive index sensor based on tapered thin core fiber
Author Affiliations +
Abstract
In this paper, we propose the design of fiber optic refractive index sensor based on a thin core fiber, sandwiched between an input and output single mode fibers. This structure is characterized by a refractive index sensitivity about 187.98 nm/RIU (refractive index unit). In order to enhance the sensitivity, we designed a tapered single mode-thin core-single mode fiber structure where the sensitivity with different waist-diameters (90, 60 and 30 μm) is investigated. As a result, we obtained an ultra-high sensitivity of the tapered sensor about 783.19 nm/RIU in the refractive index range of 1.3346-1.3899, using sucrose and water mixture solution, achieved for a waist diameter equal to 30 μm and a taper length of 675μm.The designed structure presents the merits of high sensitivity which is 4 times higher than that of the thin core fiber modal interferometer which makes it an excellent candidate for biochemical sensing applications.
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ameni Ben Khalifa, Ameni Ben Khalifa, Amine Ben Salem, Amine Ben Salem, Rim Cherif, Rim Cherif, } "Fiber optic refractive index sensor based on tapered thin core fiber", Proc. SPIE 10382, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XI, 103820D (23 August 2017); doi: 10.1117/12.2273815; https://doi.org/10.1117/12.2273815
PROCEEDINGS
6 PAGES


SHARE
Back to Top