Fiber Optic Hybrid Device for Simultaneous Measurement of Humidity and Temperature

被引：39
作者：
Mathew, Jinesh [1 ]
Semenova, Yuliya [1 ,2 ]
Farrell, Gerald [1 ,2 ]
机构：
[1] Dublin Inst Technol, Photon Res Ctr, Dublin, Ireland
[2] Dublin Inst Technol, Sch Elect & Commun Engn, Dublin, Ireland
来源：
IEEE SENSORS JOURNAL | 2013年 / 13卷 / 05期
关键词：
Agarose; Bragg gratings optical fiber devices; humidity measurement; modal interferometer; optical fiber sensors; photonics crystal fiber; temperature sensors; SENSOR;
D O I：
10.1109/JSEN.2013.2238229
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 novel fiber optic hybrid device for simultaneously measuring temperature and relative humidity (RH) is proposed and demonstrated in this paper. The device is composed of a fiber Bragg grating (FBG) and a reflection type photonic crystal fiber interferometer (PCFI) infiltrated with humidity sensitive material Agarose. The Agarose infiltrated PCFI is used to monitor the RH and an in-line FBG is used to monitor the temperature. The temperature is measured by detecting the shift in the Bragg wavelength and the humidity is measured by monitoring the change in the optical power of the reflected spectrum. The sensor shows a temperature sensitivity of 9.8 pm/degrees C and an optical power variation of >7 dB for an RH change of 75 %, with less cross sensitivity.
引用
收藏
页码：1632 / 1636
页数：5
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