A high-stable self-referenced PGC demodulation algorithm for fiber-optic interferometric sensor

Yuan, Yonggui; Li, Jin; Zhu, Yao; Tian, Shuaifei; Zhu, Yunlong; Zhu, Zheng; Zhang, Xiaojun; Jiang, Fuqiang; Dang, Fanyang; Yang, Jun

doi:10.1016/j.yofte.2023.103249

Cited by 11 publications

(2 citation statements)

References 30 publications

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“…After the output signal of the interferometer is converted into the electrical signal, the PGC-DCM algorithm with the advantages of good linearity and high phase measurement accuracy is used for demodulation. 44 3 Experimental Setup…”

Section: Principle Of the Hydrogen Detection Systemmentioning

confidence: 99%

“…The output signal of the interferometer is 43 I(t)=A+B cos[C cos(w0t)+ψ(t)],where A is the DC component, B is the amplitude of the AC component, B=κA, κ≤1, C cos(w0t) is the modulating signal, and ψ(t) is the phase change that is affected by the temperature change caused by the reaction of hydrogen with Pt-WO3. After the output signal of the interferometer is converted into the electrical signal, the PGC-DCM algorithm with the advantages of good linearity and high phase measurement accuracy is used for demodulation 44 …”

Section: Sensing Principlementioning

confidence: 99%

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Construction of trace hydrogen detection system based on distributed feedback fiber laser

Chu,

Sun,

Bian

et al. 2024

Opt. Eng.

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This paper proposes a trace hydrogen sensing system based on distributed feedback fiber laser (DFB-FL). The sensor head was fabricated by inserting the DFB-FL into a glass capillary coated with hydrogen sensitive material. The wavelength of the DFB-FL changed under the exothermic reaction of Pt-WO 3 with hydrogen and was demodulated by a Michelson interferometer. The experimental results at hydrogen concentration of 50 to 3800 ppm show that the hydrogen sensitivity of the system is 0.0386 pm∕ppm and the linearity index R 2 is >0.99. The repeatability of the system is 99.4% and the accuracy is 97.43% at hydrogen concentration of 50 ppm. The figure of merit of the system is 0.0385. The proposed DFB-FL sensor with good repeatability and anti-electronic interference has application prospects in many fields such as the detection of trace hydrogen in transformer oil.

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Section: Principle Of the Hydrogen Detection Systemmentioning

confidence: 99%