Peng DING, Jun-bin HUANG, Hong-can GU, Yun-yun WANG, Wen LIU, Jin-song TANG. Demodulation of Weak Fiber Bragg Grating Using a Double Square Wave and B-spline Wavelet[J]. Acta Photonica Sinica, 2020, 49(3): 0306002
- Acta Photonica Sinica
- Vol. 49, Issue 3, 0306002 (2020)
Fig. 1. The experiment setup
Fig. 2. Sequence diagram of double square waves reflected by WFBGs
Fig. 3. The 5-WFBG array setup
Fig. 4. The reflected signal of 5-WFBG array
Fig. 5. The detected intensity and extracted interference signal
Fig. 6. Detection of sine wave signal by four kinds of double square waves with different duty cycles
Fig. 7. The interferometric phase signals and their frequency information
Fig. 8. The interferometric intensity signals and their phase signals
Fig. 9. The phase signals of the interference signals in Area 2 under different amplitudes of sinusoidal sounds
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Table 1. The fitting phase signals of the original interference signals and the ones of the de-noised interference signals
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