Journal
OPTICS COMMUNICATIONS
Volume 431, Issue -, Pages 88-92Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2018.08.062
Keywords
Optical fiber sensor; Relative humidity measurement; Microfiber knot resonator
Categories
Funding
- National Natural Science Foundation of China (NSFC) [61327012, 61377087]
- National High Technology Research and Development Program 863, China [2009AA06Z203]
- Ministry of Education Project of Science and Technology Innovation, China [Z08119]
- Ministry of Science and Technology Project of International Cooperation, China [2008CR1063]
- Shaanxi Province Project of Science and Technology Innovation, China [2008ZDGC-14, 2009ZKC01-19]
- ShaanXi Young Scientist Star Program, China [2016 KJXX-04]
- Projects of Scientific Research Plan of ShaanXi Education Department, China [15JK1751]
- Northwest University (NWU) Young Scientist Support Program [NJ00089]
- Fellow of the Royal Geographical Society (RGS), United Kingdom
- Ministry of Education Malaysia FRGS, Malaysia [FP033-2017A]
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In this work, we experimentally demonstrated a microfiber knot resonator (MKR) for ambient relative humidity (RH) measurement. The microfiber device was manufactured by forming a ring from a low-loss microfiber, fabricated from a single-mode fiber (SMF) by using flame-heating technique. The resonator was successfully formed when a periodic output resonance spectrum was achieved. Without employing any coating hygroscopic material, the MKR was observed to highly sensitive to the variation of ambient RH ranging from of 30% RH to 94% RH. The proposed device is an extremely compact and fast response sensor, useful for a wide spectrum of industrial applications.
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