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- Title
Chromogenic Approach for Oxygen Sensing Using Tapered Coreless Optical Fibre Coated with Methylene Blue.
- Authors
Kumar, Rahul; Wight, Neil
- Abstract
In this paper, a Methylene Blue (MB)-coated tapered coreless (TCL) optical fibre sensor is proposed and experimentally investigated for oxygen sensing in the near-infrared (NIR) wavelength range of 993.5 nm. The effect of TCL diameter and MB sol–gel coating thickness on the sensitivity of the sensor was also investigated. A maximum sensitivity of 0.19 dB/O2% in the oxygen concentration range of 0–37.5% was achieved for a TCL fibre sensor with a 2 µm taper waist diameter and a 0.86 µm MB sol–gel coating thickness, with a response time of 4 min. The sensor provides reproducible results even after 7 days and is shown to be highly selective to oxygen compared to argon and ethanol at the same concentration.
- Subjects
OXYGEN detectors; METHYLENE blue; OPTICAL fibers; WAVELENGTHS; SOL-gel processes
- Publication
Metrology, 2024, Vol 4, Issue 2, p295
- ISSN
2673-8244
- Publication type
Article
- DOI
10.3390/metrology4020018