Highly sensitive FBG temperature measurement based on a wavelength pumped multiplexing filter and two optical channels  

作　　者：蒋奇 康彦深 

机构地区：[1]School of Control Science and Engineering,Shandong University

出　　处：《Optoelectronics Letters》2010年第4期306-309,共4页光电子快报（英文版）

基　　金：supported by the Natural Science Foundation of Shandong Province (No. Q2007F06);the Independent Innovation Foundationof Shandong University (No. 2009TS044)

摘　　要：An improved demodulation system for fiber Bragg grating(FBG) sensors based on the wavelength pumped multiplexing(WPM) filter is presented.Double photoelectric measurement channels are exploited to compensate the surrounding and light source interference including temperature influence.Temperature testing is employed to prove the demodulation system capacity and characteristics.The digital thermometer and one free FBG are simultaneously introduced in the constant-temperature water tank for the comparison study.The results show that the demodulation scheme can measure temperature with a high resolution,stability and reliability.Its sensitivity of temperature measurement can reach 0.05 oC in repeated testing.An improved demodulation system for fiber Bragg grating（FBG） sensors based on the wavelength pumped multiplexing（WPM） filter is presented.Double photoelectric measurement channels are exploited to compensate the surrounding and light source interference including temperature influence.Temperature testing is employed to prove the demodulation system capacity and characteristics.The digital thermometer and one free FBG are simultaneously introduced in the constant-temperature water tank for the comparison study.The results show that the demodulation scheme can measure temperature with a high resolution,stability and reliability.Its sensitivity of temperature measurement can reach 0.05 oC in repeated testing.

关 键 词：数字温度计 光纤光栅 高灵敏度 测量通道 多路复用器 测量波长 泵浦光 光纤BRAGG光栅 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]