Development of optical microfiber sensor for carbon dioxide in different concentrations using a tapering method

Hasbullah, Nur Hanis Suraya (2022) Development of optical microfiber sensor for carbon dioxide in different concentrations using a tapering method. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Fiber optics, commonly referred to as optical fiber, is a medium and system for transmitting information as light pulses over a glass or plastic strand. When light signals are transmitted through fiber optic cable, they bounce off the core and cladding in a sequence of zig-zag bounces, a phenomenon known as total internal reflection. Recently, optical microfiber sensors have received considerable research efforts due to their high sensitivity, detection speed, high flexibility and low optical power consumption. This research will focuses on the optimisation performance of tapered silica microfiber as an sensing platform. The microfiber optics sensor were developed to detect the concentrations of different CO2. The objective of this project was to use microfiber optics as a sensor to detect carbon dioxide (CO2) using a tapering method. Furthermore, the reduced diameter of the tapered section of the optical microfiber can be beneficial when measuring physical parameters. This project requires an understanding, development and analysis on different concentrations of CO2 sensors from optical loop microfibers and needs to know how to perform microfiber splicing, cutting, stripping and methods used. There will be five samples of different concentrations of CO2 tested. The experimental findings will be described in terms of sensitivity, correlation, and graphical determination coefficients, all of which depend entirely on the CO2 concentration and the light source. At the end of the project, an optical microfiber different concentration sensor with high sensitivity readings was formed. Next, the results were analysed using the factorial design method. This will determine which samples of different CO2 concentrations that has the optimum performance in terms of concentration.

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