Investigation of Relative Humidity Sensing Using Tapered No-Core Fiber Coated With Graphene Oxide Film
| Autor: | Xingdao He, Lichun Ma, Andrew R. Pike, Bin Liu, Zhen Yi, Chaowei Luo, Shengpeng Wan, Juan Liu, Qiang Wu, Yong Qing Fu, Hua Yang |
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| Rok vydání: | 2020 |
| Předmět: |
Optical fiber
Materials science business.product_category General Computer Science Oxide 02 engineering and technology 01 natural sciences law.invention 010309 optics chemistry.chemical_compound no-core fiber law 0103 physical sciences Microfiber microfiber interference General Materials Science Relative humidity Fiber Composite material Graphene General Engineering Humidity sensor 021001 nanoscience & nanotechnology Core (optical fiber) chemistry graphene oxide lcsh:Electrical engineering. Electronics. Nuclear engineering 0210 nano-technology business lcsh:TK1-9971 Refractive index |
| Zdroj: | IEEE Access, Vol 8, Pp 220755-220761 (2020) |
| ISSN: | 2169-3536 |
| DOI: | 10.1109/access.2020.3041507 |
| Popis: | A microfiber interferometer based on a single-mode tapered-no-core single-mode (STNCS) fiber structure coated with a thin layer of graphene oxide (GO) was proposed and demonstrated as a relative humidity (RH) sensor. The STNCS fiber structure has a strong evanescent field, which can sensitively response to changes in the surrounding refractive index. The moisture-sensitive material GO was used to form the film on the no-core fiber by a dip impregnation method. The effects of GO concentration and the tapered waist diameter on RH sensitivity were studied experimentally. The experimental results showed that a thinner waist diameter provides higher RH sensitivity. When the concentration of GO solution is 0.01 mg/mL, the STNCS fiber structure with a waist diameter of 2.9 μm performs better in RH sensing; a high sensitivity of 0.461 nm/%RH in the range of 40-98% was achieved. The sensor has good stability with wavelength fluctuations of ±0.009 nm and ±0.008 nm over 60 mins at RHs of 50% and 80%, respectively. The proposed fiber optic humidity sensor has a high sensitivity over a wide measurement range and offers good stability showing promising potential application in the field of RH sensing. |
| Databáze: | OpenAIRE |
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