Brillouin optical correlation domain analysis at MHz sampling rates using lock-in-free orthogonally polarized probe sidebands
- Authors
- Youn, Jae Hyeong; Kim, Ju Hyeon; Song, Kwang Yong
- Issue Date
- 2023
- Publisher
- Institute of Electrical and Electronics Engineers Inc.
- Keywords
- Amplitude modulation; Brillouin scattering; Correlation; Distributed measurement; Modulation; Optical fiber measurements; Optical fiber sensors; Optical sensors; Probes; Scattering; Sensors; Strain
- Citation
- Journal of Lightwave Technology, pp 1 - 6
- Pages
- 6
- Journal Title
- Journal of Lightwave Technology
- Start Page
- 1
- End Page
- 6
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/72713
- DOI
- 10.1109/JLT.2023.3346503
- ISSN
- 0733-8724
1558-2213
- Abstract
- An extremely high-speed Brillouin optical correlation domain analysis (BOCDA) system is demonstrated through the utilization of lock-in-free balanced detection of orthogonally-polarized probe sidebands. The proposed system achieves a sampling rate exceeding 106 Sa/s (1 MSa/s) with a centimeter-level spatial resolution, surpassing the capabilities of former correlation-domain Brillouin sensors. In test experiments, we demonstrate the polarization-independent measurement of the local Brillouin gain spectrum at a sampling rate of 2 MSa/s with a spatial resolution of 5 cm. In distributed measurements we acquire the full distribution map of Brillouin frequency along a 5.2 m standard single-mode fiber at a 10 kHz repetition rate for 144 points, equivalent to the effect sampling rate of 1.44 MSa/s. This high-speed system allows us to analyze the occurrence and propagation of the axial strain waves in a stretched optical fiber, induced by the popping noise of a powered speaker. IEEE
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Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
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