Ultracompact Vernier-effect-improved sensor by a single microfiber-knot resonator

被引：8
|
作者：
Yu, Yang [1 ]
Yu, Ya-nan [1 ]
Chen, Zhao-kun [1 ]
Li, Chun-ran [1 ]
Tian, Nong [1 ]
Yan, Hao-chen [2 ]
Luo, Jian-yi [1 ]
Xiao, Ting-hui [3 ,4 ]
机构：
[1] Wuyi Univ, Sch Appl Phys & Mat, Jiangmen 529020, Guangdong, Peoples R China
[2] Max Planck Inst Sci Light, Staudtstr 2, D-91058 Erlangen, Germany
[3] Zhengzhou Univ, Sch Phys & Microelect, Henan Key Lab Diamond Optoelect Mat & Devices, Key Lab Mat Phys,Minist Educ, Daxue Rd 75, Zhengzhou 450052, Peoples R China
[4] Univ Tokyo, Dept Chem, Tokyo 1130033, Japan
来源：
OPTICS EXPRESS | 2023年 / 31卷 / 04期
基金：
中国国家自然科学基金; 日本学术振兴会;
关键词：
PHOTONIC CRYSTAL FIBER; INTERFEROMETER; CAVITY; GUIDE; BAND;
D O I：
10.1364/OE.481253
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Fiber-optic sensors are an indispensable element of modern sensing technologies by virtue of their low cost, excellent electromagnetic immunity, and remote sensing capability. Optical Vernier effect is widely used to enhance sensitivity of fiber-optic sensors but requires bulky and complex cascaded interferometers. Here we propose and experimentally demonstrate an ultracompact (-2 mm by -2 mm) Vernier-effect-improved sensor by only using a single microfiber-knot resonator. With the Vernier effect achieved by controlling the optical beating with the spectral ripple of a super light emitting diode (SLED), we show -20x sensitivity enhancement for quantitative temperature monitoring. Our sensor creates a new practical method to realize Vernier effect in fiber-optic sensors and beyond.
引用
收藏
页码：6917 / 6924
页数：8
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