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Investigation of Relative Humidity Sensing Using Tapered No-Core Fiber Coated With Graphene Oxide Film
- Source :
- IEEE Access, Vol 8, Pp 220755-220761 (2020)
- Publication Year :
- 2020
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2020.
-
Abstract
- 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.
- Subjects :
- 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
Subjects
Details
- ISSN :
- 21693536
- Volume :
- 8
- Database :
- OpenAIRE
- Journal :
- IEEE Access
- Accession number :
- edsair.doi.dedup.....b8b61abe883bfca195758ac0e48ffc3a