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Proceedings Paper

Resolution enhancement in Brillouin optical correlation domain analysis by differential lock-in detection
Author(s): Ji Ho Jeong; Kwanil Lee; Kwang Yong Song; Je-Myung Jeong; Sang Bae Lee
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Paper Abstract

We newly propose and experimentally demonstrate a differential lock-in detection scheme for the enhancement of Brillouin optical correlation domain analysis (BOCDA), where additional phase modulation is applied to the Brillouin pump wave and the on-off control on which is used for data acquisition. The theoretical model and the experimental results show that at least three-fold improvement is obtained in the spatial resolution of the distributed measurements and the Brillouin gain spectrum (BGS) with much narrower 3dB bandwidth than that of conventional BOCDA systems is acquired by the differential lock-in detection.

Paper Details

Date Published: 7 November 2012
PDF: 4 pages
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 8421BB (7 November 2012); doi: 10.1117/12.974973
Show Author Affiliations
Ji Ho Jeong, Korea Institute of Science and Technology (Korea, Republic of)
Hanyang Univ. (Korea, Republic of)
Kwanil Lee, Korea Institute of Science and Technology (Korea, Republic of)
Kwang Yong Song, Chung-Ang Univ. (Korea, Republic of)
Je-Myung Jeong, Hanyang Univ. (Korea, Republic of)
Sang Bae Lee, Korea Institute of Science and Technology (Korea, Republic of)


Published in SPIE Proceedings Vol. 8421:
OFS2012 22nd International Conference on Optical Fiber Sensors
Yanbiao Liao; Wei Jin; David D. Sampson; Ryozo Yamauchi; Youngjoo Chung; Kentaro Nakamura; Yunjiang Rao, Editor(s)

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