The effect of pulse duration on the Brillouin frequency shift accuracy in the differential cross-spectrum BOTDR (DCS-BOTDR) fiber sensor

Zan M.S.D.; Almoosa A.S.K.; Ibrahim M.F.Hamzah A.E.Arsad N.Mokhtar M.H.H.Bakar A.A.A.Elgaud M.M.

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The effect of pulse duration on the Brillouin frequency shift accuracy in the differential cross-spectrum BOTDR (DCS-BOTDR) fiber sensor

机译：The effect of pulse duration on the Brillouin frequency shift accuracy in the differential cross-spectrum BOTDR (DCS-BOTDR) fiber sensor

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? 2022 Elsevier Inc.In this paper, we report the effect of pulse duration on the Brillouin frequency shift (BFS) accuracy measurement in our previously proposed differential cross-spectrum Brillouin optical time domain reflectometry (DCS-BOTDR) fiber sensing technique. The DCS-BOTDR uses a pair of optical pulsed probes generated via intensity modulation scheme, in which the first probe consists of a long- and short duration of pulses separated by a short interval, while the second probe only has the long pulse with the same duration as the first one. From the experimental analysis, by varying the duration of the long pulse between 6 and 60 ns, we found that an optimum range of the long pulse duration between 14 and 22 ns provided good measurement of BFS accuracy around 5.3 MHz. Furthermore, by heating up a 2 m fiber section at the end of a 4 km test fiber, by using long- and short pulse durations of 18 ns and 4 ns respectively, we have successfully demonstrated 40 cm spatial resolution and 4 °C of temperature resolution measurement.

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《Optical fiber technology》 |2022年第9期|1.1-1.8|共8页
作者
Zan M.S.D.; Almoosa A.S.K.; Ibrahim M.F.Hamzah A.E.Arsad N.Mokhtar M.H.H.Bakar A.A.A.Elgaud M.M.;
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作者单位

Department of Electrical Electronic and Systems Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia (UKM);

Department of Electrical Electronic and Systems Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia (UKM)||Department of Electronic Technologies Basra Technical Institute Southern Technical University;

College of Electrical and Electronic Technology;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
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关键词
BFS accuracy; BOTDR; Cross-correlation; Signal differential;

The effect of pulse duration on the Brillouin frequency shift accuracy in the differential cross-spectrum BOTDR (DCS-BOTDR) fiber sensor

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