High-frequency distributed acoustic sensing faster than repetition limit with frequency-multiplexed phase-OTDR

Iida, Daisuke; Toge, Kunihiro; Manabe, Tetsuya

doi:10.1364/ofc.2016.m2d.6

Cited by 17 publications

(7 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A FDM Φ-OTDR system performing better than the one described previously has been suggested by Iida et al [44]. For their experiment, the authors used a 1.25 GHz/s DAQ as the signal receiver and the pulse sequence was made of n =16 frequency components with the caution to prevent the SBS.…”

Section: φ-Otdr Systems With Frequency Response Bandwidth Higher Tmentioning

confidence: 99%

Recent Progress in the Performance Enhancement of Phase-Sensitive OTDR Vibration Sensing Systems

Zinsou

Liu

Wang

et al. 2019

Sensors

View full text Add to dashboard Cite

Recently, phase-sensitive Optical Time-Domain Reflectometry (Φ-OTDR)-based vibration sensor systems have gained the interest of many researchers and some efforts have been undertaken to push the performance limitations of Φ-OTDR sensor systems. Thus, progress in different areas of their performance evaluation factors such as improvement of the signal-to-noise ratio (SNR), spatial resolution (SR) in the sub-meter range, enlargement of the sensing range, increased frequency response bandwidth over the conventional limits, phase signal demodulation and chirped-pulse Φ-OTDR for quantitative measurement have been realized. This paper presents an overview of the recent progress in Φ-OTDR-based vibration sensing systems in the different areas mentioned above.

show abstract

Section: φ-Otdr Systems With Frequency Response Bandwidth Higher Tmentioning

confidence: 99%

Recent Progress in the Performance Enhancement of Phase-Sensitive OTDR Vibration Sensing Systems

Zinsou

Liu

Wang

et al. 2019

Sensors

View full text Add to dashboard Cite

show abstract

“…Another venue in which investigation has been done is in extending the measurable vibration frequency in a ϕ-OTDR beyond the conventional limit set by the round-trip time (RTT) given by (3). To this end, a system which uses multiple pulses having different frequencies within a single RTT has been demonstrated [29]. The principle of operation is illustrated in Figure 6, where in the left side acquisitions of backscattering traces from pulses having multiple "colored" frequency components are used to probe the fiber, with the element A ij representing the amplitude of the ith pulse at the jth acquisition.…”

Section: Das Sensitivity and Configurations For High-speed Vibration mentioning

confidence: 99%

Recent Advances in Distributed Acoustic Sensing Based on Phase-Sensitive Optical Time Domain Reflectometry

Muanenda

2018

Journal of Sensors

120

View full text Add to dashboard Cite

Distributed acoustic sensing (DAS) using coherent Rayleigh backscattering in an optical fiber has become a ubiquitous technique for monitoring multiple dynamic events in real time. It has continued to constitute a steadily increasing share of the fiber-optic sensor market, thanks to its interesting applications in many safety, security, and integrity monitoring systems. In this contribution, an overview of the recent advances of research in DAS based on phase-sensitive optical time domain reflectometry (ϕ-OTDR) is provided. Some advanced techniques used to enhance the performance of ϕ-OTDR sensors for measuring backscattering intensity changes through reduction of measurement noise are presented, in addition to methods used to increase the dynamic measurement capacity of ϕ-OTDR schemes beyond conventional limits set by the sensing distance. Recent ϕ-OTDR configurations which significantly enhance the measurement spatial resolution, including those which decouple it from the probing pulse width, are also discussed. Finally, a review of recent advances in more precise quantitative measurement of an external impact based on frequency shift and phase demodulation methods using simple direct detection ϕ-OTDR schemes is given.

show abstract

“…To produce the probe pulse sequence light, an EOM driven by an electrical signal with its frequency changing in a staircase pattern generates at its output a multi-frequency signal which is in turn pulse-modulated by an AOM. A FDM Φ-OTDR system performing better than the one described previously has been suggested by D. Iida et al [44]. For their experiment, the authors used a 1.25GHz/S DAQ as the signal receiver and the pulse sequence was made of n=16 frequency components with the caution to prevent the SBS.…”

Section: φ-Otdr System With Frequency Response Bandwidth Higher Than mentioning

confidence: 99%

Recent Progress in the Performance Enhancement of Phase-Sensitive OTDR Vibration Sensing System

Zinsou¹,

Liu²,

Wang³

et al. 2019

Preprint

View full text Add to dashboard Cite

Recently, the phase-sensitive OTDR (Φ-OTDR) based vibration sensor system has gained the focus of many researchers and some efforts have been undertaken to push further the limitations imposed on the performance of the Φ-OTDR sensor system. Then, progress in the different areas of its performance evaluation factors such as: improvement of the signal-to-noise ratio (SNR), spatial resolution (SR) in the sub-meter range, enlargement of the sensing range, frequency response bandwidth over the conventional limit and phase signal demodulation for quantitative measurement have been realized. This paper presents an overview of the recent progress in the Φ-OTDR based vibration sensing system in the different areas mentioned above.

show abstract

High-frequency distributed acoustic sensing faster than repetition limit with frequency-multiplexed phase-OTDR

Cited by 17 publications

References 1 publication

Recent Progress in the Performance Enhancement of Phase-Sensitive OTDR Vibration Sensing Systems

Recent Progress in the Performance Enhancement of Phase-Sensitive OTDR Vibration Sensing Systems

Recent Advances in Distributed Acoustic Sensing Based on Phase-Sensitive Optical Time Domain Reflectometry

Recent Progress in the Performance Enhancement of Phase-Sensitive OTDR Vibration Sensing System

Contact Info

Product

Resources

About