Using maximum spectrum of continuous wavelet transform for demodulation of an overlapped spectrum in a fiber Bragg grating sensor network.
Using maximum spectrum of continuous wavelet transform for demodulation of an overlapped spectrum in a fiber Bragg grating sensor network.
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DOI：
10.1364/ao.55.004670
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发表时间：
2016-06
期刊：
影响因子：
1.9
通讯作者：
Yinglong Hu;W. Mo;K. Dong;F. Jin;Junlei Song
中科院分区：
文献类型：
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作者：
Yinglong Hu;W. Mo;K. Dong;F. Jin;Junlei Song
针对光纤布拉格光栅(FBG)传感系统中重叠光谱的中心波长解调问题，提出了利用连续小波变换(MSCWT)的最大谱进行解调的方法。我们描述了MSCWT方法的工作原理。此外，还讨论了两个FBG波长之间的间隔、3分贝带宽和反射光谱的光功率的影响。仿真和实验结果表明，MSCWT能够很好地分辨重叠光谱，并能较高精度地解码中心波长。更重要的是，提出的峰值检测方法可以提高波分复用FBG传感器网络的感知能力。
The maximum spectrum of the continuous wavelet transform (MSCWT) is proposed to demodulate the central wavelengths for the overlapped spectrum in a serial fiber Bragg grating (FBG) sensing system. We describe the operation principle of the MSCWT method. Moreover, the influence of the interval gap between two FBG wavelengths, 3 dB bandwidths, and optical powers of the reflected spectra are discussed. The simulation and experimental results indicate that the MSCWT can resolve an overlapped spectrum and decode the central wavelength with high accuracy. More importantly, the proposed peak detection method can enhance the sensing capacity of a wavelength division multiplexing FBG sensor network.