Noise analysis in direct detection and coherent detection phase-sensitive optical time-domain reflectometry systems

被引：7

作者：

Vidal-Moreno, Pedro J. ^{[1
]}

Becerril, Carlos ^{[1
]}

Fernandez-Ruiz, Maria R. ^{[1
]}

Martins, Hugo ^{[2
]}

Martin-Lopez, Sonia ^{[1
]}

Gonzalez-Herraez, Miguel ^{[1
]}

机构：

[1] Univ Alcala, Dept Elect, Madrid, Spain

[2] Daza de Valdes Inst Opt IO CSIC, Serrano St 121, Madrid 28006, Spain

来源：

OPTICS EXPRESS | 2023年 / 31卷 / 17期

关键词：

STRAIN; SENSOR; TEMPERATURE; RANGE; OTDR;

D O I：

10.1364/OE.487978

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

This study compares noise and signal-to-noise ratio (SNR) in direct detection and coherent detection fiber-based distributed acoustic sensing (DAS) systems. Both detection schemes employ the dynamic analysis of Rayleigh-backscattered light in phase-sensitive optical time-domain reflectometry (& phi;OTDR) systems. Through theoretical and experimental analysis, it is determined that for photodetection filters with a sufficiently narrow bandwidth, the SNR performance of both detection schemes is comparable. However, for filters with poor selectivity, coherent detection was found to exhibit superior performance. These findings provide crucial guidelines for the design of high-performance time-domain DAS systems.

引用

页码：27450 / 27461

页数：12

共 23 条

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