Dual channel double wavelength method in optical fiber-based gas sensor for carbon dioxide detection

• Main Authors: Razali, Muda, Norhana, Arsad, Nur Hazliza, Ariffin, Amran, Abdul Hadi
• Format: Article
• Language: English
• Published: UTeM 2018
• Subjects: TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://umpir.ump.edu.my/id/eprint/20993/1/Dual%20channel%20double%20wavelength%20method%20in%20optical%20fiber.pdf; http://umpir.ump.edu.my/id/eprint/20993/; http://journal.utem.edu.my/index.php/jtec/article/view/3504

A novel double wavelength strategy in optical fiberbased sensor for detection of carbon dioxide (CO2) gas is presented. The detection strategy works based on an open-path direct absorption spectroscopy in the mid-infrared (mid-IR) wavelength range. The sensor system comprises of a broadband filament emitter acting as the Infrared (IR) light source, Chalcogenide Infrared (CIR) Optical Fibers, two Pyroelectric detectors which been fitted built- in with a limited bandpass CO2 channel and a reference channel. The sensor additionally uses calcium fluoride (CaF2) limit bandpass (NBP) channel for recognition of CO2 gas without cross-sensitivity to different gasses exist in the surrounding environment. The correlation amongst test and computed sensor yields are additionally exhibited.