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Ultra-Sensitive Refractive Index Sensor With Slightly Tapered Photonic Crystal Fiber

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5 Author(s)
Cheng Li ; National Laboratory of Solid State Microstructures and the College of Engineering and Applied Sciences, Nanjing University, Nanjing, China ; Sun-Jie Qiu ; Ye Chen ; Fei Xu
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We fabricate a miniature ultra-sensitive refractive index sensor based on a tapered photonic crystal fiber (PCF) modal interferometer. The PCF is slightly tapered and a little elongated to keep the size compact. The total length is ~ 2 cm, and the potential sensitivity is more than 1600 nm/RIU (refractive index unit), which is nearly eight times as high as that of an untapered PCF interferometer.

Published in:

IEEE Photonics Technology Letters  (Volume:24 ,  Issue: 19 )