High Sensitivity Refractometer Based on a Tapered-Single Mode-No Core-Single Mode Fiber Structure
Wenlei Yang,
Shuo Zhang,
Tao Geng,
Le Li,
Guoan Li,
Yijia Gong,
Kai Zhang,
Chengguo Tong,
Chunlian Lu,
Weimin Sun,
Libo Yuan
Affiliations
Wenlei Yang
Key Lab of In-fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin 150001, China
Shuo Zhang
Key Lab of In-fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin 150001, China
Tao Geng
Key Lab of In-fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin 150001, China
Le Li
Centre for Composite Materials and Structures, Key Laboratory of Science and Technology for National Defence, Harbin Institute of Technology (HIT), Harbin 150080, China
Guoan Li
Key Lab of In-fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin 150001, China
Yijia Gong
Key Lab of In-fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin 150001, China
Kai Zhang
Key Lab of In-fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin 150001, China
Chengguo Tong
School of Electronic Engineering and Automation, Guilin University of Electronic Technology, Guilin 541004, China
Chunlian Lu
Key Lab of In-fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin 150001, China
Weimin Sun
Key Lab of In-fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin 150001, China
Libo Yuan
School of Electronic Engineering and Automation, Guilin University of Electronic Technology, Guilin 541004, China
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/°C). The experimental and simulation results are also in good agreement.
