Lorentzian demodulation algorithm for multimode polymer optical fiber Bragg gratings
Lorentzian demodulation algorithm for multimode polymer optical fiber Bragg gratings
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DOI：
10.7567/1347-4065/aaf897
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发表时间：
2019-01
影响因子：
1.5
通讯作者：
Y. Mizuno;Tianyi Ma;R. Ishikawa;Heeyoung Lee;A. Theodosiou;K. Kalli;Kentaro Nakamura
中科院分区：
文献类型：
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作者：
Y. Mizuno;Tianyi Ma;R. Ishikawa;Heeyoung Lee;A. Theodosiou;K. Kalli;Kentaro Nakamura
针对应变传感应用，提出了一种简单、准确的多模光纤中光纤布拉格光栅(FBG)的洛伦兹解调算法。由于多模光纤布拉格光栅的频谱通常表现为多个峰值，当应变较大时，简单地跟踪某些特定的频谱峰值(即†，即最大检测)会导致测量失败。本文利用全氟化梯度折射率多模聚合物光纤中的FBG，通过与其他解调算法(如最大值检测法和质心检测法)的性能比较，对新方法进行了实验评估。最后，利用该方法对应变进行了精确测量，测量精度可达1.0%。
For strain sensing applications, we develop a simple and accurate Lorentzian demodulation algorithm for fiber Bragg gratings (FBGs) inscribed in multimode optical fibers. As multimode FBG spectra generally exhibit multiple peaks, simply tracking some particular spectral peaks (i.†e., maximum detection) results in measurement failure when the strain is large. Here, using an FBG inscribed in a perfluorinated graded-index multimode polymer optical fiber, we experimentally evaluate the new method by comparing its performance with those of other demodulation algorithms, such as the maximum and centroid detection methods. Finally, using this method, we demonstrate the accurate measurement of strain of up to 1.0%.