Quasi-distributed sol-gel coated fiber optic oxygen sensing probe

• Published in: Optical fiber technology Vol. 41; pp. 109 - 117
• Main Authors: Zolkapli, Maizatul, Saharudin, Suhairi, Herman, Sukreen Hana, Abdullah, Wan Fazlida Hanim
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.03.2018
• Subjects: Optical fiber oxygen sensor; PdTFPP; PtOEP; Quasi-distributed sensor; Ru(dpp)32; Sol-gel; Ru(dpp)32; PdTFPP; PtOEP; Quasi-distributed sensor; Sol-gel; Optical fiber oxygen sensor
• ISSN: 1068-5200; 1095-9912
• DOI: 10.1016/j.yofte.2017.12.016

•Low cost, easy-to-fabricate and sensitive quasi-distributed fiber optic oxygen sensor is presented.•Oxygen sensitive sensing elements were coated on fiber optic based on sol-gel method.•Sensing mechanism relies on the evanescent wave interaction. In the field of aquaculture, optical sensor technology is beginning to provide alternatives to the conventional electrical sensor. Hence, the development and characterization of a multipoint quasi-distributed optical fiber sensor for oxygen measurement is reported. The system is based on 1 mm core diameter plastic optical fiber where sections of cladding have been removed and replaced with three metal complexes sol-gel films to form sensing points. The sensing locations utilize luminophores that have emission peaks at 385 nm, 405 nm and 465 nm which associated with each of the sensing points. Interrogation of the optical sensor system is through a fiber optic spectrometer incorporating narrow bandpass emission optical filter. The sensors showed comparable sensitivity and repeatability, as well as fast response and recovery towards oxygen.