Analysis of the beat noise induced by the lock-in detection in Brillouin optical correlation domain analysis

Title
Analysis of the beat noise induced by the lock-in detection in Brillouin optical correlation domain analysis
Authors
정지호이관일송광용정제명이상배
Keywords
laser; beat noise; Brillouin
Issue Date
2011-09
Publisher
ECOC 2011
Citation
, Tu.6.LeCervin.4
Abstract
We present theoretical and experimental analysis of the beat noise occurring in distributed fiber sensors based on Brillouin optical correlation domain analysis (BOCDA). The origin of the beat noise turns out to lie in the variation of the Brillouin gain induced by the chopping of the intensity-modulated pump wave in the lock-in detection applied for the signal processing of a BOCDA system. Additionally, a variable-frequency lock-in detection technique is suggested as an effective way of the noise suppression.
URI
http://pubs.kist.re.kr/handle/201004/40808
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KIST Publication > Conference Paper
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