.Highly sensitive FBG temperature measurement based on a wavelength pumped multiplexing filter and two optical channels[J].Optoelectronics Letters,2010,6(4):306-309 Highly sensitive FBG temperature measurement based on a wavelength pumped multiplexing filter and two optical channels 蒋奇 School of Control Science and Engineering,Shandong University； Abstract:       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 °C in repeated testing. Hits: 3851 Download times: 176 View Full Text    Download reader