Graphene oxide-coated microbottle resonators for relative humidity sensing
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1. Department of Electrical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia;2. Faculty of Data Science and Information Technology, INTI International University, Nilai 71800, Malaysia;3. Faculty of Electrical and Electronic Engineering Technology, Universiti Teknikal Malaysia Melaka, Melaka 76100, Malaysia;4. Faculty of Electronic and Computer Engineering, Universiti Teknikal Malaysia Melaka, Melaka 76100, Malaysia

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    Abstract:

    Graphene oxide (GO) is a 2D coating material used to improve fiber optics sensors’ response to relative humidity. Microbottle resonators (MBRs) have garnered more attention as sensing media structures. An MBR with a 190 µm diameter was coated with GO. Then, tapered fiber light coupling was used to investigate the relative humidity sensing performance in the range of 35—70%RH at 25 °C. The MBR showed a higher Q factor before and after GO coating. The sensitivity of 0.115 dB/%RH was recorded with the 190 µm GO-coated MBR sample compared to a sensitivity of 0.022 dB/%RH for the uncoated MBR sample. These results show that the MBR can be used in fiber optic sensing applications for environmental sensing.

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Huda Adnan Zain, Malathy Batumalay, Md Ashadi Md Johari, Hazli Rafis Abdul Rahim, Sulaiman Wadi Harun. Graphene oxide-coated microbottle resonators for relative humidity sensing[J]. Optoelectronics Letters,2024,20(7):400-405

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History
  • Received:June 19,2023
  • Revised:November 18,2023
  • Online: May 28,2024
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