Differential measurement scheme for Brillouin Optical Correlation Domain Analysis
- Differential measurement scheme for Brillouin Optical Correlation Domain Analysis
- 정지호; 이관일; 송광용; 정제명; 이상배
- Issue Date
- Optics express
- VOL 19, NO 24, 27094-27101
- We newly propose and experimentally demonstrate a differential
measurement scheme for Brillouin optical correlation domain analysis,
where the difference between Brillouin gain spectra constructed by a
normal and a phase-modulated Brillouin pump waves are analyzed to
measure local Brillouin frequencies in optical fibers. In experiments, a fivefold
enhancement in the spatial resolution is obtained compared to an
ordinary BOCDA system under the same modulation parameters, as a result
of the improved dynamic range by the suppression of background noises.
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