Event Discrimination Using Phase Correlation in Φ-OTDR System Based on Coherent Detection
We report a novel method of event discrimination using phase correlation in Φ-OTDR system based on coherent detection. The phase change demodulated from the Rayleigh backscattering light is the result of the event acting on the optical fiber. Then, the correlation coefficient between the...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IEEE
2018-01-01
|
| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/8419741/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850093050959757312 |
|---|---|
| author | Zhen Zhong Feng Wang Xuping Zhang |
| author_facet | Zhen Zhong Feng Wang Xuping Zhang |
| author_sort | Zhen Zhong |
| collection | DOAJ |
| description | We report a novel method of event discrimination using phase correlation in Φ-OTDR system based on coherent detection. The phase change demodulated from the Rayleigh backscattering light is the result of the event acting on the optical fiber. Then, the correlation coefficient between the phase change of every point along the fiber and that of the fiber end is obtained. A vibration event acting on the fiber induces the change of the correlation coefficient. So, the number of vibration events is determined by the number of changes of the correlation coefficient. In addition, it proves that our proposed method is able to discriminate two close events even when they are in the range of half-pulsewidth. |
| format | Article |
| id | doaj-art-06e79a7a313d4656ae624bcbdb1ebef8 |
| institution | DOAJ |
| issn | 1943-0655 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-06e79a7a313d4656ae624bcbdb1ebef82025-08-20T02:42:00ZengIEEEIEEE Photonics Journal1943-06552018-01-011051810.1109/JPHOT.2018.28562558419741Event Discrimination Using Phase Correlation in Φ-OTDR System Based on Coherent DetectionZhen Zhong0https://orcid.org/0000-0001-5664-5949Feng Wang1https://orcid.org/0000-0001-7409-217XXuping Zhang2Institute of Optical Communication Engineering, Nanjing University, Jiangsu, ChinaSchool of Electronic Science and Engineering, Nanjing University, Jiangsu, ChinaCollege of Engineering and Applied Sciences, Nanjing University, Jiangsu, ChinaWe report a novel method of event discrimination using phase correlation in Φ-OTDR system based on coherent detection. The phase change demodulated from the Rayleigh backscattering light is the result of the event acting on the optical fiber. Then, the correlation coefficient between the phase change of every point along the fiber and that of the fiber end is obtained. A vibration event acting on the fiber induces the change of the correlation coefficient. So, the number of vibration events is determined by the number of changes of the correlation coefficient. In addition, it proves that our proposed method is able to discriminate two close events even when they are in the range of half-pulsewidth.https://ieeexplore.ieee.org/document/8419741/Event discriminationphase correlationΦ-OTDRspatial resolution limit. |
| spellingShingle | Zhen Zhong Feng Wang Xuping Zhang Event Discrimination Using Phase Correlation in Φ-OTDR System Based on Coherent Detection IEEE Photonics Journal Event discrimination phase correlation Φ-OTDR spatial resolution limit. |
| title | Event Discrimination Using Phase Correlation in Φ-OTDR System Based on Coherent Detection |
| title_full | Event Discrimination Using Phase Correlation in Φ-OTDR System Based on Coherent Detection |
| title_fullStr | Event Discrimination Using Phase Correlation in Φ-OTDR System Based on Coherent Detection |
| title_full_unstemmed | Event Discrimination Using Phase Correlation in Φ-OTDR System Based on Coherent Detection |
| title_short | Event Discrimination Using Phase Correlation in Φ-OTDR System Based on Coherent Detection |
| title_sort | event discrimination using phase correlation in x03a6 otdr system based on coherent detection |
| topic | Event discrimination phase correlation Φ-OTDR spatial resolution limit. |
| url | https://ieeexplore.ieee.org/document/8419741/ |
| work_keys_str_mv | AT zhenzhong eventdiscriminationusingphasecorrelationinx03a6otdrsystembasedoncoherentdetection AT fengwang eventdiscriminationusingphasecorrelationinx03a6otdrsystembasedoncoherentdetection AT xupingzhang eventdiscriminationusingphasecorrelationinx03a6otdrsystembasedoncoherentdetection |