Enhancement of sensing performance for yeast cell using tapered optical fibre

• Published in: AIP Conference Proceedings
• Main Author: Burham N.; Bachok N.N.; Isa N.M.; Arsad N.
• Format: Conference paper
• Language: English
• Published: American Institute of Physics Inc. 2024
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85185789909&doi=10.1063%2f5.0192088&partnerID=40&md5=fcc7779ec7a98ed5c433be65eedd4319

This paper demonstrates a simple optical sensor to sense yeast cells using a multimode tapered fibre optic. The sensitivity of various yeast cell concentrations is analysed by comparing two devices which are a spectrometer and an optical power meter. The experiment starts with tapering the optical fibre using a Vytran glass processing workstation to achieve waist diameter and length of 40 μm and 20 mm. Various yeast concentrations of 5% - 25% were used to observe the maximum absorption peak and sensitivity using the optical power meter and spectrometer. The result shows that the maximum absorption wavelength for yeast is 650 nm at 5% concentration. The sensitivity of detecting yeast is 0.005 a.u/% and 0.8931 dBm/% and was analysed by plotting the absorbance peak and output power meter. The growth and sensitivity of live yeast cells can be detected and monitored using an optical sensor and can be applied for food technology applications. © 2024 Author(s).