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Volume 26 - ICOP & ICPET 2020
ICOP & ICPET _ INPC _ ICOFS 2020, 26 - ICOP & ICPET 2020: 1109-1112 |
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Ansari M, Moravvej-Farshi M K, Gordi Armaki M. Relative Humidity Sensor Based on Tapered Optical Fiber Coated with Silica-Gel. ICOP & ICPET _ INPC _ ICOFS 2020; 26 :1109-1112
URL: http://opsi.ir/article-1-2215-en.html
URL: http://opsi.ir/article-1-2215-en.html
1- Faculty of Electrical and Computer Engineering, Nano Plasmo-Photonic Research Group, Tarbiat Modares University, Tehran, Iran
Abstract: (1576 Views)
We have fabricated and characterized a relative humidity (RH) sensor, by tapering the mid-region of a piece of multimode-fiber (MMF) and coating it with a layer of silica-gel as the sensing layer. The experimental results show that the device sensitivity depends on the presence of silica-gel layer. The sensor response to the fluctuations of relative humidity in the environment is determined through measuring the changing in fiber transmission power. The experimental results also show that the device sensitivity increases as the diameter of the fiber, in the tapered region, decreases down to a certain size. The same results show that the highest linear sensitivity of 0.39 dB/%RH can be achieved for a tapered region of the MMF with 4-μm waist diameter coated with silica gel.
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