Titanium dioxide coating microfiber for humidity sensor application / Syed Mohammad Ammar Haeder

Syed Mohammad Ammar , Haeder (2019) Titanium dioxide coating microfiber for humidity sensor application / Syed Mohammad Ammar Haeder. Masters thesis, Universiti Malaya.

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      Abstract

      In this project, the effects of Titanium dioxide coating and fiber diameter on the performance of optical fiber humidity sensor were investigated. To start off, each fiber is tapered with the help of flame brushing on the waist region in order to reduce the fiber diameter. Then, each tapered fiber is sealed in a humidity chamber with RH increased from 45% to 90% and the power output against this change is noted. In the first experiment, the 7 μm coated sample was compared with a 7 μm non-coated sample to see the effects the titanium dioxide coat brings. The coated sample showed displayed better performance as it showed greater sensitivity and greater linearity. For the second experiment, three diameters 3 μm, 7 μm and 10 μm respectively and all coated with titanium dioxide in order to check the result of varying diameter on sensor performance. The smallest diameter (3 μm) was found to show greatest sensitivity and linearity, followed by 7 μm whereas the 10 μm had the least numbers of the three. Hence, the 3 μm sample was considered as ideal choice as a RH sensor.

      Item Type: Thesis (Masters)
      Additional Information: Research Report (M.A.) – Faculty of Engineering, Universiti Malaya, 2019.
      Uncontrolled Keywords: Titanium dioxide; Optical fiber humidity sensor; Greater linearity; Non-coated; Multi mode fiber
      Subjects: T Technology > TA Engineering (General). Civil engineering (General)
      Divisions: Faculty of Engineering
      Depositing User: Mr Mohd Safri Tahir
      Date Deposited: 14 Mar 2022 07:02
      Last Modified: 14 Mar 2022 07:02
      URI: http://studentsrepo.um.edu.my/id/eprint/12973

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