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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Malathy Batumalay is a professor at INTI International University, Malaysia. She received her Ph.D. degree in photonics engineering from the University Malaya, Malaysia. Her research focuses on lasers, fiber optics, and fiber sensors. E-mail: malathy.batumalay@newinti.edu.my
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Zain, H.A., Batumalay, M., Johari, M.A.M. et al. Graphene oxide-coated microbottle resonators for relative humidity sensing. Optoelectron. Lett. 20, 400–405 (2024). https://doi.org/10.1007/s11801-024-3107-4
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DOI: https://doi.org/10.1007/s11801-024-3107-4