Open AccessIn-line Mach-Zehnder Interferometer based on Hybrid Structures for Refractive Index Sensin
Author(s) -
Abdul Nasir,
M.R. Mokhtar,
Noor Shafikah Md Rodzi
Publication year - 2019
Publication title -
international journal of recent technology and engineering
Language(s) - English
Resource type - Journals
ISSN - 2277-3878
DOI - 10.35940/ijrte.c1008.1083s19
Subject(s) - mach–zehnder interferometer , interferometry , fusion splicing , refractive index , materials science , optics , cladding (metalworking) , cladding mode , normalized frequency (unit) , linearity , sensitivity (control systems) , optical fiber , fiber optic sensor , fabrication , optoelectronics , polarization maintaining optical fiber , physics , electronic engineering , engineering , phase noise , phase locked loop , frequency synthesizer , metallurgy , medicine , alternative medicine , pathology
A Mach-Zehnder interferometer (MZI) built using several concatenated different structures is proposed as a refractive index sensor. This sensor is comprised of a microbubble, a section of reduced cladding fiber (RCF) and a core-offset single-mode fiber (SMF). These structures are joined together through specialized arc fusion splicing procedures. The sensor is characterised by immersing it in Cargille oil with refractive index values ranging from 1.30 to 1.39. The sensor exhibits linearity in respect to the refractive index changes, with a good sensitivity of 144.42 nm/RIU. The proposed MZI has the advantages of cost effective, repeatable fabrication, compact size and high sensitivity, which make it a promising sensor.