Digital coherent detection research on Brillouin optical time domain reflectometry with simplex pulse codes
The digital coherent detection technique has been investigated without any frequency-scanning device in the Brillouin optical time domain reflectometry （BOTDR）, where the simplex pulse codes are applied in the sensing system. The time domain signal of every code sequence is collected by the data acq...
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| Published in | Chinese physics B Vol. 23; no. 11; pp. 253 - 256 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.11.2014
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1674-1056 2058-3834 1741-4199 |
| DOI | 10.1088/1674-1056/23/11/110703 |
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| Abstract | The digital coherent detection technique has been investigated without any frequency-scanning device in the Brillouin optical time domain reflectometry （BOTDR）, where the simplex pulse codes are applied in the sensing system. The time domain signal of every code sequence is collected by the data acquisition card （DAQ）. A shift-averaging technique is applied in the frequency domain for the reason that the local oscillator （LO） in the coherent detection is fix-frequency deviated from the primary source. With the 31-bit simplex code, the signal-to-noise ratio （SNR） has 3.5-dB enhancement with the same single pulse traces, accordant with the theoretical analysis. The frequency fluctuation for simplex codes is 14.01 MHz less than that for a single pulse as to 4-m spatial resolution. The results are believed to be beneficial for the BOTDR performance improvement. |
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| AbstractList | The digital coherent detection technique has been investigated without any frequency-scanning device in the Brillouin optical time domain reflectometry (BOTDR), where the simplex pulse codes are applied in the sensing system. The time domain signal of every code sequence is collected by the data acquisition card (DAQ). A shift-averaging technique is applied in the frequency domain for the reason that the local oscillator (LO) in the coherent detection is fix-frequency deviated from the primary source. With the 31-bit simplex code, the signal-to-noise ratio (SNR) has 3.5-dB enhancement with the same single pulse traces, accordant with the theoretical analysis. The frequency fluctuation for simplex codes is 14.01 MHz less than that for a single pulse as to 4-m spatial resolution. The results are believed to be beneficial for the BOTDR performance improvement. The digital coherent detection technique has been investigated without any frequency-scanning device in the Brillouin optical time domain reflectometry （BOTDR）, where the simplex pulse codes are applied in the sensing system. The time domain signal of every code sequence is collected by the data acquisition card （DAQ）. A shift-averaging technique is applied in the frequency domain for the reason that the local oscillator （LO） in the coherent detection is fix-frequency deviated from the primary source. With the 31-bit simplex code, the signal-to-noise ratio （SNR） has 3.5-dB enhancement with the same single pulse traces, accordant with the theoretical analysis. The frequency fluctuation for simplex codes is 14.01 MHz less than that for a single pulse as to 4-m spatial resolution. The results are believed to be beneficial for the BOTDR performance improvement. |
| Author | 郝蕴琦 叶青 潘政清 蔡海文 瞿荣辉 |
| AuthorAffiliation | College of Physics and Electronics Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China Shanghai S ynet Optics Technology Corporation, Shanghai 201203, China. |
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| Cites_doi | 10.1109/LPT.2011.2107551 10.1364/OE.16.019097 10.1088/1674-1056/22/7/074214 10.1109/50.17729 10.1364/AO.29.002219 10.1364/JOSAB.22.001321 10.1016/j.optcom.2005.05.040 10.1364/OL.35.000259 10.1109/LPT.2009.2012874 10.1109/JPHOT.2012.2213243 10.1109/LPT.2004.836916 10.1016/j.optcom.2011.09.030 10.1109/68.229819 10.1109/50.400684 |
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| DocumentTitleAlternate | Digital coherent detection research on Brillouin optical time domain reflectometry with simplex pulse codes |
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| Notes | Brillouin optical time domain reflectometry, digital coherent detection, simplex pulse codes,signal-to-noise ratio Hao Yun-Qi, Ye Qing, Pan Zheng-Qing, Cai Hai-Wen and Qu Rong-Hui（ a） College of Physics and Electronics Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China b） Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China c ） shanghai S ynet Optics Technology Corporation, Shanghai 201203, China. 11-5639/O4 The digital coherent detection technique has been investigated without any frequency-scanning device in the Brillouin optical time domain reflectometry （BOTDR）, where the simplex pulse codes are applied in the sensing system. The time domain signal of every code sequence is collected by the data acquisition card （DAQ）. A shift-averaging technique is applied in the frequency domain for the reason that the local oscillator （LO） in the coherent detection is fix-frequency deviated from the primary source. With the 31-bit simplex code, the signal-to-noise ratio （SNR） has 3.5-dB enhancement with the same single pulse traces, accordant with the theoretical analysis. The frequency fluctuation for simplex codes is 14.01 MHz less than that for a single pulse as to 4-m spatial resolution. The results are believed to be beneficial for the BOTDR performance improvement. ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
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| References | 11 12 13 14 15 17 18 19 Kurashi T (1) 1992 2 Lee D (16) 2004 4 5 6 Hao Y Q (3) 2013; 22 7 Lu Y G (8) 2010 9 10 |
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| SubjectTerms | BOTDR Brillouin zone Coherence Devices Digital Fluctuation Oscillators Reflectometry Signal to noise ratio Time domain 单脉冲跟踪 布里渊光时域反射计 数据采集卡 时域信号 检测技术 相干检测 频率波动 |
| Title | Digital coherent detection research on Brillouin optical time domain reflectometry with simplex pulse codes |
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