Open AccessPerformance of humidity sensor based on photonic crystal fiber interferometer
Author(s) -
Hanan J. Taher
Publication year - 2019
Publication title -
iraqi journal of physics
Language(s) - English
Resource type - Journals
eISSN - 2664-5548
pISSN - 2070-4003
DOI - 10.30723/ijp.v14i30.203
Subject(s) - materials science , fusion splicing , photonic crystal fiber , interferometry , relative humidity , astronomical interferometer , fabrication , optical fiber , humidity , optics , optoelectronics , mach–zehnder interferometer , fiber , wavelength , composite material , physics , medicine , alternative medicine , pathology , thermodynamics
Photonic Crystal Fiber Interferometers (PCFIs) are greatly usedfor sensing applications. This work presents the fabrication andcharacterization of a relative humidity sensor based on Mach-Zehnder Interferometer (MZI), which operates in reflection mode.The humidity sensor operation based on the adsorption anddesorption of water vapour at the silica-air interface within the PCF.The fabrication of this sensor is simple, it only includes splicing andcleaving the PCF with SMF.PCF (LMA-10) with a certain lengthspliced to SMF (Corning-28).The spectrum of PCFI exhibits good sensitivity to humidityvariations. The PCFI response is observed for a range of humidityvalues from (27% RH to 85% RH), the position of the interferencepeaks is found to be shifted to longer wavelength with humidityincreasing. In this work, a different length of PCFs are used, and themaximum humidity sensitivity of (5.86 pm / %RH) is achieved with(4.5cm) PCF length, and the rise time of (8sec) is achieved. Thishumidity sensor has distinguished features as that it does not requirethe use of a hygroscopic material, robust, compact size, immunity toelectromagnetic interference, and it has potential applications forhigh humidity environments.