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Fast and high spatial resolution distributed optical fiber sensor
Esmailzadeh Noghani, F ; Sharif University of Technology | 2019
476
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- Type of Document: Article
- DOI: 10.1016/j.optlastec.2019.02.033
- Publisher: Elsevier Ltd , 2019
- Abstract:
- Distributed optical fiber sensors (DOFS) based on stimulated Brillouin scattering (SBS) are increasingly gaining popularity due to their vast practical applications. There have been a lot of Brillouin-based distributed fiber sensing methods proposed so far but they suffer from a trade-off between spatial resolution, dynamic range and measurement time. In this paper, we propose a scanning-free Brillouin optical time domain analyzer (BOTDA) based on multiple short pulse stimulated Brillouin scattering. The accumulation of acoustic phonons which are stimulated due to the passage of successive pico-second pulses along the sensing fiber causes the sub-centimeter spatial resolution and kilometer dynamic range can be achieved simultaneously in our proposed technique called multiple short pulse BOTDA (MSP-BOTDA). Moreover, since the effective Brillouin gain bandwidth of pump pulse train is more than the natural SBS bandwidth, a wider range of temperature/strain changes can be detectable by MSP-BOTDA technique compared to conventional BOTDA method. © 2019 Elsevier Ltd
- Keywords:
- Fiber optics sensors ; Scattering ; Stimulated Brillouin ; Bandwidth ; Composite structures ; Economic and social effects ; Image resolution ; Optical fibers ; Optical pumping ; Scattering ; Time domain analysis ; Brillouin optical timedomain analyzer (BOTDA) ; Centimeter spatial resolution ; Distributed fiber sensing ; Distributed optical fiber sensors ; Fiber optics sensors ; High spatial resolution ; Stimulated Brillouin ; Stimulated Brillouin Scattering (SBS) ; Stimulated Brillouin scattering
- Source: Optics and Laser Technology ; Volume 115 , 2019 , Pages 277-288 ; 00303992 (ISSN)
- URL: https://www.sciencedirect.com/science/article/abs/pii/S0030399218310089