Concentration sensor based on a tilted fiber Bragg grating for anions monitoring

被引：62

作者：

Melo, L. B. ^{[1
]}

Rodrigues, J. M. M. ^{[2
]}

Farinha, A. S. F. ^{[2
]}

Marques, C. A. ^{[1
]}

Bilro, L. ^{[1
]}

Alberto, N. ^{[1
]}

Tome, J. P. C. ^{[2
]}

Nogueira, R. N. ^{[1
]}

机构：

[1] Inst Telecomunicacoes, P-3810193 Aveiro, Portugal

[2] Univ Aveiro, Dept Chem, QOPNA, P-3810193 Aveiro, Portugal

来源：

OPTICAL FIBER TECHNOLOGY | 2014年 / 20卷 / 04期

关键词：

Sensors; Chemical sensors; Tilted fiber Bragg gratings; Bio-chemical compounds; Anions; Refractive index; ACETATE ANIONS; REFRACTOMETER; CATION;

D O I：

10.1016/j.yofte.2014.05.002

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The ubiquity and importance of anions in many crucial roles accounts for the current high interest in the design and preparation of effective sensors for these species. Therefore, a tilted fiber Bragg grating sensor was fabricated to investigate individual detection of different anion concentrations in ethyl acetate, namely acetate, fluoride and chloride. The influence of the refractive index on the transmission spectrum of a tilted fiber Bragg grating was determined by developing a new demodulation method. This is based on the calculation of the standard deviation between the cladding modes of the transmission spectrum and its smoothing function. The standard deviation method was used to monitor concentrations of different anions. The sensor resolution obtained for the anion acetate, fluoride and chloride is 79 x 10(-5) mol/dm(3), 119 x 10(-5) mol/dm(3) and 78 x 10(-5) mol/dm(3), respectively, within the concentration range of (39-396) x 10(-5) mol/dm(3). (C) 2014 Elsevier Inc. All rights reserved.

引用

页码：422 / 427

页数：6

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