Journal
OPTICAL FIBER TECHNOLOGY
Volume 57, Issue -, Pages -Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.yofte.2020.102233
Keywords
Tapered multicore fiber; Multimode fiber; Refractive index sensing; Temperature cross-sensitivity
Funding
- National Key Research and Development Program of China [2017YFB0405501]
- Major Technique Innovation Program of Hubei Province of China [2018AAA016]
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An optic fiber refractive index (RI) sensor based on SMF-MMF-TMCF-SMF (SMTmS) structure is proposed. The MMF segment is introduced and confirmed theoretically and experimentally to act as an efficient optical coupler to launch the light from the center core to the cladding. Experimental results demonstrate that SMTmS is highly sensitive (1435.76 nm/RIU) to low surrounding RI in the range of 1.3330- 1.3451. The temperature sensing has been implemented and the total wavelength shift of only 1.83 nm is achieved for the range of 30 degrees C-100 degrees C, implying a relatively low temperature cross-sensitivity of 2.01 x 10(-5) RIU/degrees C. The developed sensor with high RI sensitivity and low temperature cross-sensitivity could be rather suitable and applicable in the fields of seawater sensing and environmental monitoring.
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