TY - JOUR
T1 - Recent progress in slope-assisted Brillouin optical correlation-domain reflectometry
AU - Lee, Heeyoung
AU - Nakamura, Kentaro
AU - Mizuno, Yosuke
N1 - Funding Information:
This work was partly supported by JSPS KAKENHI Grant Numbers 17H04930 and 17J07226 and by research grants from the Noguchi Institute and the Telecommunications Advancement Foundation .
Publisher Copyright:
© 2020 Elsevier Inc.
PY - 2020/10
Y1 - 2020/10
N2 - Brillouin optical correlation-domain reflectometry (BOCDR) is one of the fiber-optic Brillouin-based distributed sensing techniques for strain and temperature with single-end accessibility. Since the first proposal of the basic concept in 2008, the performance of BOCDR has been drastically improved from a variety of aspects including high-speed operation. Here, we focus on one of the high-speed BOCDR configurations referred to as slope-assisted (SA-) BOCDR. In this configuration, instead of observing the whole Brillouin gain spectrum, only the spectral power at a certain frequency on the spectrum is detected, leading to frequency-sweep-free high-speed operation and some unique features. In this review paper, we describe the recent advances of SA-BOCDR technology from its principle to characterization and applications. We also discuss the current issues of SA-BOCDR and present a concluding remark.
AB - Brillouin optical correlation-domain reflectometry (BOCDR) is one of the fiber-optic Brillouin-based distributed sensing techniques for strain and temperature with single-end accessibility. Since the first proposal of the basic concept in 2008, the performance of BOCDR has been drastically improved from a variety of aspects including high-speed operation. Here, we focus on one of the high-speed BOCDR configurations referred to as slope-assisted (SA-) BOCDR. In this configuration, instead of observing the whole Brillouin gain spectrum, only the spectral power at a certain frequency on the spectrum is detected, leading to frequency-sweep-free high-speed operation and some unique features. In this review paper, we describe the recent advances of SA-BOCDR technology from its principle to characterization and applications. We also discuss the current issues of SA-BOCDR and present a concluding remark.
KW - Brillouin scattering
KW - Correlation-domain technique
KW - Distributed sensing
KW - Optical fiber sensors
KW - Optical reflectometry
KW - Structural health monitoring
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U2 - 10.1016/j.yofte.2020.102312
DO - 10.1016/j.yofte.2020.102312
M3 - Article
AN - SCOPUS:85088639070
SN - 1068-5200
VL - 59
JO - Optical Fiber Technology
JF - Optical Fiber Technology
M1 - 102312
ER -