High-sensitivity, high-spatial-resolution distributed strain sensing based on a poly(methyl methacrylate) chirped fiber Bragg grating

Chengang Lyu; Ziqi Liu; Ziqiang Huo; Chunfeng Ge; Xin Cheng; Haw-Yaw Tam

doi:doi:10.1364/PRJ.391160

Photonics Research, 2020, 8 (7): 07001134, Published Online: Jun. 4, 2020

High-sensitivity, high-spatial-resolution distributed strain sensing based on a poly(methyl methacrylate) chirped fiber Bragg grating Download： 644次

Chengang Lyu ¹Ziqi Liu ¹Ziqiang Huo ¹Chunfeng Ge ²Xin Cheng ^3,*Haw-Yaw Tam ³

Author Affiliations

¹ School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China

² School of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China

³ Photonics Research Center, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China

Figures & Tables

Fig. 1. Frequency relationship between the CFBG and FRM and corresponding beat frequencies. Inset: differential frequency offset δf(λA) of the CFBG under strain. SG, grating section.

下载图片查看原文

Fig. 2. Schematic of the experimental setup. Inset: beat frequency relationship between the time and position. The blue dotted line is the linear fit, which reflects the distance-induced beat frequency, while the black spots show the DFO. SS, swept laser source; PD, photodiode; PA, power amplifier; DAQ, data acquisition; DSP, digital signal processor.

下载图片查看原文

Fig. 3. Optical setup for chirped grating inscription.

下载图片查看原文

Fig. 4. Microwave spectrogram calculated by STFT without strain. (a) Silica fiber. (b) PMMA fiber. Insets: (i) measured reflection spectrum and (ii) measured initial temporal interference waveform.

下载图片查看原文

Fig. 5. Microwave spectrogram calculated by STFT under strain. (a) Silica fiber. (b) PMMA fiber. Insets: reflection spectra of the (i) silica and (ii) PMMA fibers under stress.

下载图片查看原文

Fig. 6. DFO at various strains. The insets show spectrograms of the temporal interference patterns at uniform strains of 4060 and 5540 με.

下载图片查看原文

Fig. 7. Characterization of the system by applying various uniform strains at distances of (a) 4 mm, (b) 3 mm, (c) 2 mm, and (d) 1 mm.

下载图片查看原文

Fig. 8. Comparison of theoretical and experimental values of spatial resolution.

下载图片查看原文

Chengang Lyu, Ziqi Liu, Ziqiang Huo, Chunfeng Ge, Xin Cheng, Haw-Yaw Tam. High-sensitivity, high-spatial-resolution distributed strain sensing based on a poly(methyl methacrylate) chirped fiber Bragg grating[J]. Photonics Research, 2020, 8(7): 07001134.

High-sensitivity, high-spatial-resolution distributed strain sensing based on a poly(methyl methacrylate) chirped fiber Bragg grating Download： 644次

Fig. 1. Frequency relationship between the CFBG and FRM and corresponding beat frequencies. Inset: differential frequency offset δf(λA) of the CFBG under strain. SG, grating section.

Fig. 3. Optical setup for chirped grating inscription.

Fig. 4. Microwave spectrogram calculated by STFT without strain. (a) Silica fiber. (b) PMMA fiber. Insets: (i) measured reflection spectrum and (ii) measured initial temporal interference waveform.

Fig. 5. Microwave spectrogram calculated by STFT under strain. (a) Silica fiber. (b) PMMA fiber. Insets: reflection spectra of the (i) silica and (ii) PMMA fibers under stress.

Fig. 6. DFO at various strains. The insets show spectrograms of the temporal interference patterns at uniform strains of 4060 and 5540 με.

Fig. 7. Characterization of the system by applying various uniform strains at distances of (a) 4 mm, (b) 3 mm, (c) 2 mm, and (d) 1 mm.

Fig. 8. Comparison of theoretical and experimental values of spatial resolution.

关于本站 Cookie 的使用提示

全站搜索

High-sensitivity, high-spatial-resolution distributed strain sensing based on a poly(methyl methacrylate) chirped fiber Bragg grating Download： 644次

Fig. 1. Frequency relationship between the CFBG and FRM and corresponding beat frequencies. Inset: differential frequency offset δf(λA) of the CFBG under strain. SG, grating section.

Fig. 3. Optical setup for chirped grating inscription.

Fig. 4. Microwave spectrogram calculated by STFT without strain. (a) Silica fiber. (b) PMMA fiber. Insets: (i) measured reflection spectrum and (ii) measured initial temporal interference waveform.

Fig. 5. Microwave spectrogram calculated by STFT under strain. (a) Silica fiber. (b) PMMA fiber. Insets: reflection spectra of the (i) silica and (ii) PMMA fibers under stress.

Fig. 6. DFO at various strains. The insets show spectrograms of the temporal interference patterns at uniform strains of 4060 and 5540 με.

Fig. 7. Characterization of the system by applying various uniform strains at distances of (a) 4 mm, (b) 3 mm, (c) 2 mm, and (d) 1 mm.

Fig. 8. Comparison of theoretical and experimental values of spatial resolution.

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索