Analysis of the beat noise induced by the lock-in detection in Brillouin optical correlation domain analysis
- Analysis of the beat noise induced by the lock-in detection in Brillouin optical correlation domain analysis
- 정지호; 이관일; 송광용; 정제명; 이상배
- laser; beat noise; Brillouin
- Issue Date
- ECOC 2011
- , Tu.6.LeCervin.4
- 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.
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