Abstract
In this present work we report fabrication of fiber optic liquid refractive index (RI) measurement sensor based on Michelson Interferometer method. This sensor was assembled by using graded index multimode (MM) fiber with core diameter 50 µm and the cladding of fiber was removed by simple chemical method. To perform this experiment a 2×2 3dB coupler is used. The fiber ends are then immersed in solvent and solution to provide reference and refractive index measurements, respectively. This method was successfully used to measure refractive index of Sodium Chloride (NaCl)-Water solution at different concentrations. The fringe contrast sensitivity of device is 92.90 dB/RIU measured in the RI range from 1.34 to 1.42 which is better than Mach-Zehnder Interferometer sensor [1] and Fabry perot based sensor [2]. The fabrication of sensor is simple, low cost and highly sensitive. © 2015 AIP Publishing LLC.

Abstract
In this paper we fabricate a hetro core optical fiber sensor for concentration measurement. The obtained sensitivity for 10% to 45% is 0.24 dBm/% and for 45% to 100% It is 0.14 dBm/%. © OSA 2016.

Abstract

Abstract
In this paper, a hexagonal structure of ethanol filled solid core photonic crystal fiber having dispersion shifted properties is presented. The guiding properties, like effective mode area and dispersion, of the ethanol filled photonic crystal fiber are studied by using the full vectorial finite element method. The numerical simulation results show that the selectively filling of the ethanol in the cladding holes of photonic crystal fiber shifts the zero dispersion wavelength from near infrared region (0.98 µm) to mid infrared region (1.55 µm). This kind of photonic crystal fiber structure is very useful for dispersion compensating tool, sensing applications, fiber laser devices and non-linear applications like supercontinuum generation. © 2017 Elsevier GmbH

Abstract

Abstract
We report a magnetic field sensor based on dual core photonic crystal fiber. By using coupled mode theory, the sensing characteristics of the sensor investigated. The sensitivity of the proposed sensor is of 172.54 pm/Oe. © OSA 2016.