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Improving Accuracy and Sensitivity of a Tilted Fiber Bragg Grating Refractometer using Cladding Mode Envelope Derivative
Zhixiang Huang1; Ning Yang1; Jiwei Xie1; Xile Han1; Xiangyu Yan1; Daotong You2; Kaiwei Li2; Mang I Vai3; Kam-Weng Tam4; Tuan Guo2; Gaozhi Xiao1
2022-05
Source PublicationJournal of Lightwave Technology
ISSN0733-8724
Abstract

Tilted fiber Bragg grating (TFBG) sensors are widely used in biochemical and electrochemical sensing due to their high sensitivity to refractive index (RI) of the surrounding medium. Ability of TFBGs to measure small RI change is currently limited due to the discrete spectral characteristics of TFBG cladding modes. Here we propose a novel method to measure both small and large RI changes with high accuracy and sensitivity by measuring the derivative of the intensity of the entire cladding mode envelope. The peak of the derivative curve provides a continuous and linear response to the RI change, which overcomes the problem of “cut-off mode hopping” that, until now, has limited the resolution of RI measurement using TFBGs. Experimental results demonstrate that, for small RI change (less than 0.002 RIU), the cladding envelope derivative method improves the interrogation sensitivity from tens of nm/RIU (using cut-off mode) to hundreds of nm/RIU (this method) together with a linear response (better than 98%),Moreover, such method provides the ability of temperature crosstalk calibration, offering a powerful new tool for biochemical detection.

Indexed BySCIE
Language英語English
Document TypeJournal article
CollectionDEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Faculty of Science and Technology
Affiliation1.Institute of Photonics Technology, Jinan University, Guangzhou 510632, China
2.Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China
3.State Key Laboratory of Analog and Mixed-Signal VLSI, University of Macau, 59193 Taipa, Macau, China
4.Faculty of Science and Technology, University of Macau, Macau, China.
Recommended Citation
GB/T 7714
Zhixiang Huang,Ning Yang,Jiwei Xie,et al. Improving Accuracy and Sensitivity of a Tilted Fiber Bragg Grating Refractometer using Cladding Mode Envelope Derivative[J]. Journal of Lightwave Technology,2022.
APA Zhixiang Huang,Ning Yang,Jiwei Xie,Xile Han,Xiangyu Yan,Daotong You,Kaiwei Li,Mang I Vai,Kam-Weng Tam,Tuan Guo,&Gaozhi Xiao.(2022).Improving Accuracy and Sensitivity of a Tilted Fiber Bragg Grating Refractometer using Cladding Mode Envelope Derivative.Journal of Lightwave Technology.
MLA Zhixiang Huang,et al."Improving Accuracy and Sensitivity of a Tilted Fiber Bragg Grating Refractometer using Cladding Mode Envelope Derivative".Journal of Lightwave Technology (2022).
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