TY - JOUR
T1 - Research on Photonic Crystal Fiber Sensor Network Based on Fast Fourier Transform Bandpass Filtering
AU - Liu, Qiang
AU - Xia, Yongwei
AU - Xue, Pingsheng
AU - Lu, Cai
AU - Wu, Qiang
AU - Fu, Yongqing
N1 - Funding information: This research was funded by the National Natural Science Foundation of China (Grant No. 51907017), the Key Science and Technology Research Projects of Higher Education Institutions in Hebei Province of China (Grant No. ZD2019304), Hebei Natural Science Foundation (Grant No. F2020501040), the Fundamental Research Funds for the Central Universities of China (Grant No. N2123012).
PY - 2023/5/30
Y1 - 2023/5/30
N2 - In this article, we have solved the problem that the cascaded photonic crystal fiber interferometers (PCFIs) built by fusion splicing are difficult to demodulate. In order to reduce the demodulation difficulty of the sensor network, we find that controlling the lengths of the collapsed regions can make the output spectra of partial interferometers more sinusoidal. We perform fast Fourier transform (FFT) processing on individual interferometer and select interferometers that can be used in cascade through frequency division multiplexing (FDM). In order to simplify and increase the accuracy of demodulation, this article adopts the method of combining FFT and FFT bandpass filtering technology, and finally realizes the separate demodulation of strain for five cascaded interferometers. This method can be applied in the demodulation of any composed spectrum with arbitrary waveform formed by the cascaded sensors. Finally, it is experimentally verified that the interferometer is not subject to temperature crosstalk.
AB - In this article, we have solved the problem that the cascaded photonic crystal fiber interferometers (PCFIs) built by fusion splicing are difficult to demodulate. In order to reduce the demodulation difficulty of the sensor network, we find that controlling the lengths of the collapsed regions can make the output spectra of partial interferometers more sinusoidal. We perform fast Fourier transform (FFT) processing on individual interferometer and select interferometers that can be used in cascade through frequency division multiplexing (FDM). In order to simplify and increase the accuracy of demodulation, this article adopts the method of combining FFT and FFT bandpass filtering technology, and finally realizes the separate demodulation of strain for five cascaded interferometers. This method can be applied in the demodulation of any composed spectrum with arbitrary waveform formed by the cascaded sensors. Finally, it is experimentally verified that the interferometer is not subject to temperature crosstalk.
KW - Fast Fourier transform (FFT) bandpass filtering
KW - photonic crystal fiber (PCF)
KW - sensor network
UR - http://www.scopus.com/inward/record.url?scp=85161637452&partnerID=8YFLogxK
U2 - 10.1109/TIM.2023.3276005
DO - 10.1109/TIM.2023.3276005
M3 - Article
SN - 0018-9456
VL - 72
SP - 1
EP - 8
JO - IEEE Transactions on Instrumentation and Measurement
JF - IEEE Transactions on Instrumentation and Measurement
M1 - 9507608
ER -