scholarly journals High speed demodulation method of identical weak fiber Bragg gratings based on wavelength-sweep optical time-domain reflectometry

2016 ◽  
Vol 65 (20) ◽  
pp. 204209
Author(s):  
Wang Yi-Ming ◽  
Hu Chen-Chen ◽  
Liu Quan ◽  
Guo Hui-Yong ◽  
Yin Guang-Lin ◽  
...  
Keyword(s):  
Time Domain ◽  
High Speed ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Time Domain Reflectometry ◽  
Optical Time Domain Reflectometry ◽  
Optical Time ◽  
Demodulation Method

Combined time-wavelength interrogation of fiber-Bragg gratings based on an optical time-domain reflectometry

Laser Physics ◽  
2008 ◽  
Vol 18 (11) ◽  
pp. 1301-1304 ◽  
Author(s):  
Yu. N. Kulchin ◽  
O. B. Vitrik ◽  
A. V. Dyshlyuk ◽  
A. M. Shalagin ◽  
S. A. Babin ◽  
...  
Keyword(s):  
Time Domain ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Time Domain Reflectometry ◽  
Optical Time Domain Reflectometry ◽  
Optical Time

Characterization of Low-Reflectance Bragg Gratings Using Optical Time Domain Reflectometry

1997 ◽  
Vol 3 (2) ◽  
pp. 168-172 ◽  
Author(s):  
N Katcharov ◽  
J Rioublanc ◽  
J.L Auguste ◽  
J.M Blondy ◽  
P Di Bin
Keyword(s):  
Time Domain ◽  
Bragg Gratings ◽  
Time Domain Reflectometry ◽  
Optical Time Domain Reflectometry ◽  
Optical Time

scholarly journals Recent Advances in Phase-Sensitive Optical Time Domain Reflectometry (Ф-OTDR)

2021 ◽  
Vol 11 (1) ◽  
pp. 1-30
Author(s):  
Yunjiang Rao ◽  
Zinan Wang ◽  
Huijuan Wu ◽  
Zengling Ran ◽  
Bing Han
Keyword(s):  
Fiber Optics ◽  
Time Domain ◽  
Acoustic Waves ◽  
Rapid Development ◽  
Development Stage ◽  
Time Domain Reflectometry ◽  
Rayleigh Backscattering ◽  
Optical Time Domain Reflectometry ◽  
Phase Sensitive ◽  
Optical Time

AbstractPhase-sensitive optical time domain reflectometry (Ф-OTDR) is an effective way to detect vibrations and acoustic waves with high sensitivity, by interrogating coherent Rayleigh backscattering light in sensing fiber. In particular, fiber-optic distributed acoustic sensing (DAS) based on the Ф-OTDR with phase demodulation has been extensively studied and widely used in intrusion detection, borehole seismic acquisition, structure health monitoring, etc., in recent years, with superior advantages such as long sensing range, fast response speed, wide sensing bandwidth, low operation cost and long service lifetime. Significant advances in research and development (R&D) of Ф-OTDR have been made since 2014. In this review, we present a historical review of Ф-OTDR and then summarize the recent progress of Ф-OTDR in the Fiber Optics Research Center (FORC) at University of Electronic Science and Technology of China (UESTC), which is the first group to carry out R&D of Ф-OTDR and invent ultra-sensitive DAS (uDAS) seismometer in China which is elected as one of the ten most significant technology advances of PetroChina in 2019. It can be seen that the Ф-OTDR/DAS technology is currently under its rapid development stage and would reach its climax in the next 5 years.

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