Relative Humidity Sensor using Tungsten Disulfide Coated on Tapered Microfiber
DOI:
https://doi.org/10.53655/joe.s3858hKeywords:
WS2 coating, Humidity Sensing, Tapered Fiber, Flame Brushing TechniqueAbstract
A two-dimensional transition-metal dichalcogenide material like tungsten disulfide (WS2) can be used to increase the sensitivity of a few sensing applications. The impact of WS2 coating on tapered region microfiber (MF) for relative humidity (RH) sensing applications was examined in this work. The typical single-mode fiber (SMF) and waist diameter diameters of Microfiber 3 µm were tapered, using the flame brushing technique. The drop-casting process, a simple deposition technique, was then used to coat the microfiber in WS2. Depositing WS2 onto the tapered zone resulted in high humidity sensor sensitivity because the MF had a strong evanescent field that enabled quick near-field interaction between the directed light and the environment. To demonstrate repeatability and sensor stability, the experiments were repeated three times to quantify the average transmitted power. Different %RH concentration was evaluated with the MF sample size. Additionally, at room temperature and in the %RH range of 40% to 60% RH, the performances of coated and uncoated microfiber were examined. Thus, microfiber coated with WS2 encourages enhancement in the evanescent field effect in optical fiber humidity sensor.
References
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Copyright (c) 2025 Naimah Mat Isa, Muhammad Razin Aiman Rizal, Aziati Husna Awang, Norhafizah Burham
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