High-Spatial-Resolution Fast BOTDA for Dynamic Strain Measurement Based on Differential Double-Pulse and Second-Order Sideband of Modulation

Dong, Yongkang; Ba, Dexin; Jiang, Taofei; Zhou, Dengwang; Zhang, Hongying; Zhu, Chengyu; Lü, Zhiwei; Li, Hui; Chen, Liang; Bao, Xiaoyi

doi:10.1109/jphot.2013.2267532

Cited by 84 publications

(23 citation statements)

References 15 publications

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“…For the classical BOTDA scheme, the temperature or strain measurement time is usually several seconds to several minutes long, which limits its applications to a static or a slowly-varying measurement. Based on References [32][33][34], the expression of the maximum sampling rate can be modified to become the equation below.…”

Section: The Speed Limitations Of the Distributed Measurement For Thementioning

confidence: 99%

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Recent Progress in Fast Distributed Brillouin Optical Fiber Sensing

et al. 2018

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Brillouin-based optical fiber sensing has been regarded as a good distributed measurement tool for the modern large geometrical structure and the industrial facilities because it can demodulate the distributed environment information (e.g., temperature and strain) along the sensing fiber. Brillouin optical time domain analysis (BOTDA), which is an excellent and attractive scheme, has been widely developed thanks to its high performance in a signal-to-noise ratio, a spatial resolution, and sensing distance. However, the sampling rate of the classical BOTDA is severely limited by several factors (especially the serially frequency-sweeping process) so that it cannot be suitable for the quickly distributed measurement. In this work, we summarize some promising breakthroughs about the fast BOTDA, which can be named as an optical frequency comb technique, an optical frequency-agile technique, a slope-assisted technique, and an optical chirp chain technique.

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Section: The Speed Limitations Of the Distributed Measurement For Thementioning

confidence: 99%

“…For instance, this value should be set to 2 for the differential double-pulse (DPP) BOTDA scheme [32] while it depends on the encoding bits and rules for the coding approach [33]. N aνe is the times of the averaging.…”

Section: The Speed Limitations Of the Distributed Measurement For Thementioning

confidence: 99%

Recent Progress in Fast Distributed Brillouin Optical Fiber Sensing

et al. 2018

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“…It's capability to provide highly precise and distributed measurements of strain and temperature profiles has been demonstrated [5,6]. However, due to the frequency-scanning nature, the acquisition time and post-processing time of most existing BOTDAs can vary from seconds to minutes when sensing ranges and spatial resolutions changes [7][8][9][10], which limits its development in the field of fast distributed monitoring systems, such as a vibration measuring system for long sensing range and high spatial resolution for civil or aeronautic structures applications [11,12].…”

Section: Introductionmentioning

confidence: 99%

Fast Frame Synchronization Design and FPGA Implementation in SF-BOTDA

et al. 2020

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To address the issues of high time consumption of frame synchronization involved in a scanning-free Brillouin optical time-domain analysis (SF-BOTDA) system, a fast frame synchronization algorithm based on incremental updating was proposed. In comparison to the standard frame synchronization algorithm, the proposed one significantly reduced the processing time required for the BOTDA system frame synchronization by about 98%. In addition, to further accelerate the real-time performance of frame synchronization, a field programmable gate array (FPGA) hardware implementation architecture based on parallel processing and pipelining mechanisms was also proposed. Compared with the software implementation, it further raised the processing speed by 13.41 times. The proposed approach could lay a foundation for the BOTDA system in the field with the associated high real-time requirements.

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“…Sensing technology of strain and temperature using optical fibers has been an active area of research for many decades, and a wide variety of configurations have been developed thus far. They operate based on fiber Bragg gratings [1,2,3], long-period gratings [4,5], Brillouin scattering [6,7,8,9], Raman scattering [10,11], optical interference [12,13,14,15,16,17,18,19,20,21,22,23,24], and many others. Among numerous types of interference-based sensors, those based on intermodal interference in multimode fibers (MMFs) have recently attracted a considerable attention owing to their system simplicity and cost efficiency.…”

Section: Introductionmentioning

confidence: 99%

Observation of multimodal interference in millimeter-long polymer optical fibers

Mizuno

Hagiwara

Matsutani

et al. 2019

IEICE Electron. Express

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We observe multimodal interference in single-mode-multimodesingle-mode sensors comprising short polymer optical fibers (POFs) with lengths from 100 mm down to 7 mm. Characteristic spectral peaks/dips are observed not in the conventionally used telecom band but around 1000 nm. We find that the dip wavelength depends on temperature but that the sensitivity is much lower than those obtained in the longer wavelength range when longer POFs are used. We discuss the possibility that, even with the reduced sensitivity, our success in observing multimodal interference in millimeter-long optical fibers will be a basis toward the combined use of frequency and intensity information in conventional fiber-optic single-point sensors for discriminative measurement of multiple physical parameters.

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High-Spatial-Resolution Fast BOTDA for Dynamic Strain Measurement Based on Differential Double-Pulse and Second-Order Sideband of Modulation

Cited by 84 publications

References 15 publications

Recent Progress in Fast Distributed Brillouin Optical Fiber Sensing

Recent Progress in Fast Distributed Brillouin Optical Fiber Sensing

Fast Frame Synchronization Design and FPGA Implementation in SF-BOTDA

Observation of multimodal interference in millimeter-long polymer optical fibers

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