Nonlinear response in polymer optical fibre Bragg grating based sensors

被引：2
|
作者：
Zhang, W. [1 ]
Webb, D. J. [1 ]
Peng, G. -D. [2 ]
机构：
[1] Aston Univ, Aston Inst Photon Technol, Birmingham B4 7ET, W Midlands, England
[2] Univ New S Wales, Sch Elect Engn & Telecommunicat, Sydney, NSW 2052, Australia
来源：
22ND INTERNATIONAL CONFERENCE ON OPTICAL FIBER SENSORS, PTS 1-3 | 2012年 / 8421卷
关键词：
Polymers optical fibre; PMMA; fibre Bragg grating; humidity; temperature; concentration; Osmosis effect;
D O I：
10.1117/12.974937
中图分类号：
TP7 [遥感技术];
学科分类号：
081102 ; 0816 ; 081602 ; 083002 ; 1404 ;
摘要：
PMMA based polymer optical fibre Bragg gratings have been used for humidity, temperature and concentration sensing. Due to the water affinity of PMMA, the characteristic wavelength of the grating is largely modulated by the water content in the fibre. The rate of water transportation between fibre and surrounding depends on the permeability coefficient for PMMA, which is a function of surrounding temperature and humidity. This leads to increased water content with increasing humidity and temperature. Consequently the wavelength of the grating shows a nonlinear change over varying humidity and temperature. This nonlinearity needs to be calibrated prior to sensor application.
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页数：4
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