High Sensitivity Refractometer Based on a Tapered-Single Mode-No Core-Single Mode Fiber Structure

We have proposed a novel tapered-single mode-no core-single mode (TSNS) fiber refractometer based on multimode interference. The TSNS structure exhibits a high contrast ratio (＞15 dB) and a uniform interference fringe. The influence of different lengths and diameters of the TSNS on the refractive in...

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Published inSensors (Basel, Switzerland) Vol. 19; no. 7; p. 1722
Main Authors Yang, Wenlei, Zhang, Shuo, Geng, Tao, Li, Le, Li, Guoan, Gong, Yijia, Zhang, Kai, Tong, Chengguo, Lu, Chunlian, Sun, Weimin, Yuan, Libo
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 10.04.2019
MDPI
Subjects
Composite materials
fiber optics sensor
Interference fringes
Light
no core fiber
Optics
refractive index sensor
Refractivity
Sensitivity
Sensors
China
Fiber optics sensor
no core fiber
refractive index sensor
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Summary:We have proposed a novel tapered-single mode-no core-single mode (TSNS) fiber refractometer based on multimode interference. The TSNS structure exhibits a high contrast ratio (＞15 dB) and a uniform interference fringe. The influence of different lengths and diameters of the TSNS on the refractive index unit (RIU) sensitivity was investigated. The experimental investigations indicated a maximum sensitivity of 1517.28 nm/RIU for a refractive index of 1.417 and low-temperature sensitivity (＜10 pm/ºC). The experimental and simulation results are also in good agreement.
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ISSN:1424-8220
1424-8220
DOI:10.3390/s19071722