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Zhao X, Yao N, Zhang X, Zhang L, Tao G, Li Z, Liu Q, Zhao X, Xu Y. Optimizing Evanescent Efficiency of Chalcogenide Tapered Fiber. MATERIALS 2022; 15:ma15113834. [PMID: 35683134 PMCID: PMC9181228 DOI: 10.3390/ma15113834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 05/18/2022] [Accepted: 05/24/2022] [Indexed: 12/10/2022]
Abstract
Evanescent wave absorption-based mid-infrared chalcogenide fiber sensors have prominent advantages in multicomponent liquid and gas detection. In this work, a new approach of tapered-fiber geometry optimization was proposed, and the evanescent efficiency was also theoretically calculated to evaluate sensing performance. The influence of fiber geometry (waist radius (Rw), taper length (Lt), waist deformation) on the mode distribution, light transmittance (T), evanescent proportion (TO) and evanescent efficiency (τ) is discussed. Remarkably, the calculated results show that the evanescent efficiency can be over 10% via optimizing the waist radius and taper length. Generally, a better sensing performance based on tapered fiber can be achieved if the proportion of the LP11-like mode becomes higher or Rw becomes smaller. Furthermore, the radius of the waist boundary (RL) was introduced to analyze the waist deformation. Mode proportion is almost unchanged as the RL increases, while τ is halved. In addition, the larger the micro taper is, the easier the taper process is. Herein, a longer waist can be obtained, resulting in larger sensing area which increases sensitivity greatly.
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Affiliation(s)
- Xudong Zhao
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China; (X.Z.); (X.Z.); (Z.L.); (Q.L.); (X.Z.)
| | - Ni Yao
- Research Center for Intelligent Sensing, Zhejiang Laboratory, Hangzhou 311121, China;
- Correspondence: (N.Y.); (Y.X.)
| | - Xianghua Zhang
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China; (X.Z.); (X.Z.); (Z.L.); (Q.L.); (X.Z.)
- Laboratoire des Verres et Céramiques, UMR-CNRS 6226, Sciences Chimiques de Rennes, Université de Rennes 1, 35042 Rennes, France
| | - Lei Zhang
- Research Center for Intelligent Sensing, Zhejiang Laboratory, Hangzhou 311121, China;
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Guangming Tao
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China;
| | - Zijian Li
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China; (X.Z.); (X.Z.); (Z.L.); (Q.L.); (X.Z.)
| | - Quan Liu
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China; (X.Z.); (X.Z.); (Z.L.); (Q.L.); (X.Z.)
| | - Xiujian Zhao
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China; (X.Z.); (X.Z.); (Z.L.); (Q.L.); (X.Z.)
| | - Yinsheng Xu
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China; (X.Z.); (X.Z.); (Z.L.); (Q.L.); (X.Z.)
- Correspondence: (N.Y.); (Y.X.)
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