Development of Taper-in-Taper-Based Optical Fiber Sensors for Chemical and Biological Sensing

This paper presents the development of taper-in-taper fiber (TITF)–optical fiber-based sensors for chemical and biological detection. TITF structure is a fiber structure formed by fabricating a taper again on the taper region of the traditional taper fiber. The experimental results show that the TIT...

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Main Authors: Fei Liu, Wen Zhang, Xianzheng Lang, Xuecheng Liu, Ragini Singh, Guoru Li, Yiyan Xie, Bingyuan Zhang, Santosh Kumar
Format: Article
Language:English
Published: MDPI AG 2023-05-01
Series:Photonics
Subjects:
Online Access:https://www.mdpi.com/2304-6732/10/5/567
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author Fei Liu
Wen Zhang
Xianzheng Lang
Xuecheng Liu
Ragini Singh
Guoru Li
Yiyan Xie
Bingyuan Zhang
Santosh Kumar
author_facet Fei Liu
Wen Zhang
Xianzheng Lang
Xuecheng Liu
Ragini Singh
Guoru Li
Yiyan Xie
Bingyuan Zhang
Santosh Kumar
author_sort Fei Liu
collection DOAJ
description This paper presents the development of taper-in-taper fiber (TITF)–optical fiber-based sensors for chemical and biological detection. TITF structure is a fiber structure formed by fabricating a taper again on the taper region of the traditional taper fiber. The experimental results show that the TITF structure has a lower transmitted intensity than the common taper fiber structure. It is demonstrated that the structure of TITF is more conducive to evanescent waves, thereby making it more sensitive to changes in the refractive index (RI) of the external environment. To confirm this, measurements of ethanol solutions with different water contents are taken using the TITF structure to showcase the chemical sensing, thus verifying its sensitivity to RI changes in the external environment. The sensor can measure ethanol solutions from 0 to 100% with a sensitivity of 4.06 a.u./%. Thereafter, the TITF sensor is modified with ZnO-NPs to enhance its sensitivity for biological sensing (creatinine detection). The transmitted intensity of different concentrations of creatinine solution (0–2000 μM) is measured using the proposed sensor. The sensor showed good linearity and a high sensitivity of 0.11 a.u./μM for creatinine solution. Therefore, it is demonstrated that the TITF sensor with ZnO-NPs can be used for effective biological sensing.
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spelling doaj.art-7df25b9cd8f443b596c31844ada76cc52023-11-18T02:54:35ZengMDPI AGPhotonics2304-67322023-05-0110556710.3390/photonics10050567Development of Taper-in-Taper-Based Optical Fiber Sensors for Chemical and Biological SensingFei Liu0Wen Zhang1Xianzheng Lang2Xuecheng Liu3Ragini Singh4Guoru Li5Yiyan Xie6Bingyuan Zhang7Santosh Kumar8Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, ChinaShandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, ChinaShandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, ChinaShandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, ChinaCollege of Agronomy, Liaocheng University, Liaocheng 252059, ChinaShandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, ChinaShandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, ChinaShandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, ChinaShandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, ChinaThis paper presents the development of taper-in-taper fiber (TITF)–optical fiber-based sensors for chemical and biological detection. TITF structure is a fiber structure formed by fabricating a taper again on the taper region of the traditional taper fiber. The experimental results show that the TITF structure has a lower transmitted intensity than the common taper fiber structure. It is demonstrated that the structure of TITF is more conducive to evanescent waves, thereby making it more sensitive to changes in the refractive index (RI) of the external environment. To confirm this, measurements of ethanol solutions with different water contents are taken using the TITF structure to showcase the chemical sensing, thus verifying its sensitivity to RI changes in the external environment. The sensor can measure ethanol solutions from 0 to 100% with a sensitivity of 4.06 a.u./%. Thereafter, the TITF sensor is modified with ZnO-NPs to enhance its sensitivity for biological sensing (creatinine detection). The transmitted intensity of different concentrations of creatinine solution (0–2000 μM) is measured using the proposed sensor. The sensor showed good linearity and a high sensitivity of 0.11 a.u./μM for creatinine solution. Therefore, it is demonstrated that the TITF sensor with ZnO-NPs can be used for effective biological sensing.https://www.mdpi.com/2304-6732/10/5/567evanescent wavesfiber optic sensortaper-in-taper fiberrefractive indexzinc oxide nanoparticles
spellingShingle Fei Liu
Wen Zhang
Xianzheng Lang
Xuecheng Liu
Ragini Singh
Guoru Li
Yiyan Xie
Bingyuan Zhang
Santosh Kumar
Development of Taper-in-Taper-Based Optical Fiber Sensors for Chemical and Biological Sensing
Photonics
evanescent waves
fiber optic sensor
taper-in-taper fiber
refractive index
zinc oxide nanoparticles
title Development of Taper-in-Taper-Based Optical Fiber Sensors for Chemical and Biological Sensing
title_full Development of Taper-in-Taper-Based Optical Fiber Sensors for Chemical and Biological Sensing
title_fullStr Development of Taper-in-Taper-Based Optical Fiber Sensors for Chemical and Biological Sensing
title_full_unstemmed Development of Taper-in-Taper-Based Optical Fiber Sensors for Chemical and Biological Sensing
title_short Development of Taper-in-Taper-Based Optical Fiber Sensors for Chemical and Biological Sensing
title_sort development of taper in taper based optical fiber sensors for chemical and biological sensing
topic evanescent waves
fiber optic sensor
taper-in-taper fiber
refractive index
zinc oxide nanoparticles
url https://www.mdpi.com/2304-6732/10/5/567
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