Characterization of a polyimide-coated humidity sensor in a hybrid fibre grating configuration

被引：1
|
作者：
Alwis, Lourdes [1 ]
Sun, Tong [2 ]
Grattan, Kenneth T. V. [2 ,3 ]
机构：
[1] Edinburgh Napier Univ, Sch Engn & Built Environm, Edinburgh, Midlothian, Scotland
[2] City Univ London, Sch Engn & Math Sci, London EC1V 0HB, England
[3] City Univ London, City Grad Sch, London EC1V 0HB, England
来源：
24TH INTERNATIONAL CONFERENCE ON OPTICAL FIBRE SENSORS | 2015年 / 9634卷
关键词：
Fibre Bragg Grating (FBG); Long Period Grating (LPG); Hybrid Sensor (HS); Relative Humidity (RH);
D O I：
10.1117/12.2193678
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：
A Relative Humidity (RH) sensor incorporating a Long Period Grating (LPG) and a Fibre Bragg Grating (FBG) in a series configuration was developed and evaluated. The LPG was coated with polyimide allowing it to respond to humidity changes while the FBG is used for temperature compensation. The hybrid sensor was then tested over the change in RH from 20-95 % and temperature of 20-80 degrees C. The sensitivity of the hybrid sensor to temperature and RH were determined to be 9 pm/degrees C and 0.23 nm/% RH, with negligible hysteresis (<1% RH), showing the value of the dual LPG/FBG approach to optimize sensitivity.
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页数：4
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