Brillouin Distributed Fiber Sensors: An Overview and Applications

Galindez-Jamioy, Carlos Augusto; López‐Higuera, J. M.

doi:10.1155/2012/204121

Cited by 167 publications

(86 citation statements)

References 82 publications

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“…An example for the BS dependency of temperature and strain into a standard Single Mode Fiber (SMF) with BFS about 10 to 11 Ghz at 1550nm is showed in Figure 4 [7].…”

Section: General Informationmentioning

confidence: 99%

“…This light is launched into OF for generating spontaneous BS. As illustrated in Figure 6 [7], back-propagated light is measured with a coherent receiver by mixing the spread signal and local oscillator (LO) signal [11]. Because the back scattered signal power is small, the The 40 th ARA Proceedings attenuation of the fiber can cause a negative effect on the quality of the measurement.…”

Section: Brillouin Optical Time-domain Reflectometrymentioning

confidence: 99%

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Distributed Brillouin Sensors for Simultaneous Temperature and Strain Sensing

Popa¹,

Jderu²,

Livede³

et al. 2016

ARA 40th Congress Proceedings

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Abstract:This work makes an overview of Distribute Brillouin Sensors (DBS) with Optical Fiber (OF) aiming specifically at their applications for the temperatures and strain measuring in different structures. Firstly, Brillouin Scattering (BS) effect of light waves through OF, Stimulated Brillouin scattering (SBS) Stokes and anti-Stokes are described. It continues with the DBS networks presentation, the studied methods and techniques, inventorying their main practical applications. It ends with a comparative presentation of the basic parameters for the presented different techniques followed by conclusions.

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“…An example for the BS dependency of temperature and strain into a standard Single Mode Fiber (SMF) with BFS about 10 to 11 Ghz at 1550nm is showed in Figure 4 [7].…”

Section: General Informationmentioning

confidence: 99%

Section: Brillouin Optical Time-domain Reflectometrymentioning

confidence: 99%

Distributed Brillouin Sensors for Simultaneous Temperature and Strain Sensing

Popa¹,

Jderu²,

Livede³

et al. 2016

ARA 40th Congress Proceedings

View full text Add to dashboard Cite

show abstract

“…Since the power in the backscatterd Brillouin signal is small, it can induce a negative effect on the quality of the measurements. To compensate this drawback a coherent detection is used (Galindez-Jamioy et al 2012). The principal aim of coherent detection is fading noise to obtain better quality of data (Kurashima et al 1997).…”

Section: Brillouin Optical Time Domain Reflectometer (Botdr)mentioning

confidence: 99%

SHM by DOFS in civil engineering: a review

Rodríguez¹,

Casas²,

Villalba³

2015

Structural Monitoring and Maintenance

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Abstract. This paper provides an overview of the use of different Distributed Optical Fiber Sensor systems (DOFSs) to perform Structural Health Monitoring (SHM) in the specific case of civil engineering structures. Nowadays, there are several methods available for extracting distributed measurements from optical fiber, and their use have to be according with the aims of the SHM performance. The continuous-in-space data is the common advantage of the different DOFSs over other conventional health monitoring systems and, depending on the particular characteristics of each DOFS, a global and/or local health structural evaluation is possible with different accuracy. Firstly, the fundamentals of different DOFSs and their principal advantages and disadvantages are presented. Then, laboratory and field tests using different DOFSs systems to measure strain in structural elements and civil structures are presented and discussed. Finally, based on the current applications, conclusions and future trends of DOFSs in SHM in civil structures are proposed.

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“…These sensors provide high precision distributed temperature and strain measurements along hundreds of thousands of measurement positions over large structures. This renders BOTDA sensors highly useful for a number of structural health applications in several industrial sectors, such as ensuring the integrity of oil and gas pipelines, the structural health of bridges, tunnels, roads, railways and dams, the detection of fire in tunnels and industrial facilities, or assessing the temperature of sub-sea and underground electric power cables [2].…”

Section: Introductionmentioning

confidence: 99%

Non-Local Effects in Brillouin Optical Time-Domain Analysis Sensors

et al. 2017

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Brillouin optical time-domain analysis (BOTDA) sensors have great potential to provide distributed measurements of temperature and strain over large structures with high spatial resolution and measurement precision. However, their performance ultimately depends on the amount of probe and pump pulse power that can be injected into the sensing fiber, which determines the signal-to-noise ratio of the detected measurement signal. The probe wave power is constrained by the generation of noise induced by spontaneous Brillouin scattering and at lower power by the so-called non-local effects. In this work, we focus on the latter. We review the physical origins of non-local effects and analyze the performance impairments that they bring. In addition, we discuss the different methods that have been proposed to counteract these effects comparing their relative merits and ultimate performance. Particularly, we focus on a technique that we have devised to compensate non-local effects which is based on introducing an optical frequency modulation or dithering to the probe wave. This method is shown to provide a comprehensive solution to most of the impairments associated with non-local effects and also to enable some side benefits, such as amplification of the pump pulses to compensate the attenuation of the fiber.

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Brillouin Distributed Fiber Sensors: An Overview and Applications

Cited by 167 publications

References 82 publications

Distributed Brillouin Sensors for Simultaneous Temperature and Strain Sensing

Distributed Brillouin Sensors for Simultaneous Temperature and Strain Sensing

SHM by DOFS in civil engineering: a review

Non-Local Effects in Brillouin Optical Time-Domain Analysis Sensors

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