Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/107149
Title: | Improving the spatial resolution of a BOTDA sensor using deconvolution algorithm | Authors: | Shen, L Zhao, Z Zhao, C Wu, H Lu, C Tang, M |
Issue Date: | 1-Apr-2021 | Source: | Journal of lightwave technology, 1 Apr. 2021, v. 39, no. 7, p. 2215-2222 | Abstract: | Spatial resolution improvement from an acquired measurement using long pulse is developed for Brillouin optical time domain analysis (BOTDA) systems based on the total variation deconvolution algorithm. The frequency dependency of Brillouin gain temporal envelope is investigated by simulation, and its impact on the recovered results of deconvolution algorithm is thoroughly analyzed. To implement a reliable deconvolution process, differential pulse-width pair (DPP) technique is utilized to effectively eliminate the systematic Brillouin frequency shift (BFS) distortion stemming from the frequency dependency of temporal envelope. The width of the pulse pairs should be larger than 40 ns as is analyzed theoretically and verified experimentally. It has been demonstrated that the proposed method can realize flexible adjustment of spatial resolution with enhanced signal-to-noise ratio (SNR) from an established measurement with long pump pulse. In the experiment, the spatial resolution is increased to 0.5 m and 1 m with high measurement accuracy by using the deconvolution algorithm from the measurement of 60/40 ns DPP signals. Compared with the raw DPP results with the same spatial resolution, 7.9 dB and 5.9 dB SNR improvements are obtained for 0.5 m and 1 m spatial resolution respectively, thanks to the denoising capability of the total variation deconvolution algorithm. The impact of sampling rate on the recovery results is also studied. The proposed sensing system allows for distortion-free Brillouin distributed sensing with higher spatial resolution and enhanced SNR from the conventional DPP setup with long pulse pairs. | Keywords: | Brillouin scattering Deconvolution Distributed optical fiber sensors Signal processing |
Publisher: | Institute of Electrical and Electronics Engineers | Journal: | Journal of lightwave technology | ISSN: | 0733-8724 | EISSN: | 1558-2213 | DOI: | 10.1109/JLT.2020.3047504 | Rights: | © 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The following publication L. Shen, Z. Zhao, C. Zhao, H. Wu, C. Lu and M. Tang, "Improving the Spatial Resolution of a BOTDA Sensor Using Deconvolution Algorithm," in Journal of Lightwave Technology, vol. 39, no. 7, pp. 2215-2222, 1 April 2021 is available at https://doi.org/10.1109/JLT.2020.3047504. |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Zhao_Improving_Spatial_Resolution.pdf | Pre-Published version | 1.45 MB | Adobe PDF | View/Open |
Page views
1
Citations as of Jun 30, 2024
Downloads
1
Citations as of Jun 30, 2024
SCOPUSTM
Citations
16
Citations as of Jun 21, 2024
WEB OF SCIENCETM
Citations
14
Citations as of Jun 27, 2024
![](/image/google_scholar.jpg)
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.