Frequency-Scanning BOTDA With Ultimately Fast Acquisition Speed

Frequency-Scanning BOTDA With Ultimately Fast Acquisition Speed

A polarization-independent fast and distributed frequency-scanning Brillouin optical time-domain analysis (BOTDA) technique is presented, capable of acquiring the full Brillouin gain spectrum at a speed limited only by the fiber length and the employed frequency scanning granularity. For a 145-m lon...

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Veröffentlicht in:IEEE photonics technology letters 2015-07, Vol.27 (13), p.1426-1429
Hauptverfasser: Sovran, Ido, Motil, Avi, Tur, Moshe
Format: Artikel
Sprache:eng
Schlagworte:
Brillouin scattering
Brillouin zone
Dynamic range
Frequency measurement
Frequency scanning
Gain
Marketing
nonlinear optics
Optical fiber polarization
Optical fiber sensors
Optical fibers
Probes
Scattering
Strain
Time domain analysis
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Zusammenfassung:A polarization-independent fast and distributed frequency-scanning Brillouin optical time-domain analysis (BOTDA) technique is presented, capable of acquiring the full Brillouin gain spectrum at a speed limited only by the fiber length and the employed frequency scanning granularity. For a 145-m long fiber and 71 interrogating frequencies, the ultimate measurement speed of 9700 [full-fiber-Brillouin-gain-spectra]/second is demonstrated, covering a strain dynamic range of 4200 με with an accuracy of ±10 με. Dynamic measurements with a spatial resolution of 10 cm are also demonstrated by combining the technique with the double pulse pair BOTDA method.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2015.2424271