Quantitative Analysis of φ-OTDR Spatial Resolution Influenced by NLM Parameters
Abstract
:1. Introduction
2. Processing Steps for Signal SR Affected by NLM Parameters
2.1. -OTDR Signal
2.2. NLM Parameters
2.3. Steps for Obtaining the Relationship between FWHM and NLM Parameters
- Input a noisy signal;
- Calculate the FWHM and AM of the reference signal;
- Denoise the noisy signal with SIWS = 10, SEWS = 100, and the GSP increasing from 0.02 with a step of 0.001;
- Calculate the FWHM and AM of the denoised signal;
- Repeat steps 3 to 4 until the GSP reaches 0.1;
- Calculate the FWHM/FWHM and AM/AM.
3. SR of Simulated Signals Varies with the NLM Parameters
3.1. FWHM Varies with NLM Parameters
3.2. AM Varies with NLM Parameters
3.3. Analysis
4. SR of -OTDR Signals Varies with NLM Parameters
4.1. FWHM Varies with NLM Parameters
4.2. AM Varies with NLM Parameters
4.3. Analysis
5. Discussion
6. Conclusions
- 1.55% (SIWS) > 0.72% (SEWS) > 0.29% (GSP);
- 2.77% (SIWS) > 0.06% (SEWS) 0.09% (GSP).
- 9.55% (GSP) > 0.05% (SIWS) 0.04% (SEWS);
- 13.51% (GSP) > 0.08% (SIWS) > 0.03% (SEWS).
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Parameter | FWHM/FWHM | AM/AM | FCL-ACF |
---|---|---|---|
GSP | 100.29% | 90.45% | 0.9888 |
SIWS | 101.84% | 90.79% | 0.9963 |
SEWS | 102.56% | 90.75% | 0.9978 |
Parameter | FWHM/FWHM | AM/AM | FCL-ACF |
---|---|---|---|
GSP | 99.91% | 86.49% | 0.372 |
SIWS | 102.68% | 86.41% | 0.422 |
SEWS | 102.74% | 86.38% | 0.445 |
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Chen, Y.; Zhu, S.; Yu, K.; Wu, M.; Feng, L.; Zhu, P.; Chen, W. Quantitative Analysis of φ-OTDR Spatial Resolution Influenced by NLM Parameters. Photonics 2023, 10, 529. https://doi.org/10.3390/photonics10050529
Chen Y, Zhu S, Yu K, Wu M, Feng L, Zhu P, Chen W. Quantitative Analysis of φ-OTDR Spatial Resolution Influenced by NLM Parameters. Photonics. 2023; 10(5):529. https://doi.org/10.3390/photonics10050529
Chicago/Turabian StyleChen, Yunfei, Shuhan Zhu, Kaimin Yu, Minfeng Wu, Lei Feng, Peibin Zhu, and Wen Chen. 2023. "Quantitative Analysis of φ-OTDR Spatial Resolution Influenced by NLM Parameters" Photonics 10, no. 5: 529. https://doi.org/10.3390/photonics10050529