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U-shaped micro-groove fiber based on femtosecond laser processing for humidity sensing.
- Source :
- Optoelectronics Letters; May2018, Vol. 14 Issue 3, p212-215, 4p
- Publication Year :
- 2018
-
Abstract
- A novel optical fiber sensor with a U-shaped micro-groove structure ablated by femtosecond laser on single-mode fiber for measuring air relative humidity (RH) is reported in this paper. In order to improve the accuracy of sensor, a graphene oxide (GO)/polyvinyl alcohol (PVA) composite film is coated on the surface of micro-groove structure. In the U-shaped micro-groove structure, the remaining core and micro-cavity in the micro-groove make up two major optical propagation paths, forming a Mach-Zehnder interferometer (MZI). The sensor has a good linear response within the RH range of 30%—85%, and the maximum sensitivity can reach 0.638 1 nm/%RH. The effect of temperature on the overall performance of the humidity sensor is also investigated. As a new type of all-fiber device, the sensor shows excellent sensitivity and stability. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 16731905
- Volume :
- 14
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Optoelectronics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 129491817
- Full Text :
- https://doi.org/10.1007/s11801-018-7262-3