Dynamic BOTDA measurements based on Brillouin phase-shift and RF demodulation.

Citation data:

Optics express, ISSN: 1094-4087, Vol: 20, Issue: 24, Page: 26942-9

Publication Year:
2012
Usage 5
Abstract Views 5
Citations 80
Citation Indexes 80
PMID:
23187549
DOI:
10.1364/oe.20.026942
Author(s):
Urricelqui, Javier; Zornoza, Ander; Sagues, Mikel; Loayssa, Alayn
Publisher(s):
The Optical Society
Tags:
Physics and Astronomy
article description
We demonstrate a novel dynamic BOTDA sensor based, for the first time to our knowledge, on the use of the Brillouin phase-shift in addition to the conventional Brillouin gain. This provides the advantage of measurements that are largely immune to variations in fiber attenuation or changes in pump pulse power. Furthermore, the optical detection deployed leads to an enhanced precision or measurement time and to the broadening of the measurement range. Proof-of-concept experiments demonstrate 1.66-kHz measurement rate with 1-m resolution over a 160 m sensing fiber length. Moreover, a measurement range of 2560 µε with a precision of 20 µε is successfully proved.