TY - JOUR
T1 - Trade-off relation between strain dynamic range and spatial resolution in slope-assisted Brillouin optical correlation-domain reflectometry
AU - Lee, Heeyoung
AU - Noda, Kohei
AU - Mizuno, Yosuke
AU - Nakamura, Kentaro
N1 - Publisher Copyright:
© 2019 IOP Publishing Ltd.
PY - 2019/6/4
Y1 - 2019/6/4
N2 - Slope-assisted Brillouin optical correlation-domain reflectometry (SA-BOCDR) is one of the high-speed distributed strain sensing techniques, but its strain dynamic range has been limited to approximately 0.15%, which is far from being sufficient for some practical applications. In this paper, we clarify that, unlike widely used time-domain techniques, SA-BOCDR has a trade-off relation between the strain dynamic range and the spatial resolution. This trade-off originates from the unique bell-shaped noise floor inherently involved in the Brillouin gain spectrum observed with correlation-domain techniques. We experimentally show that, at the cost of three times lowered spatial resolution, the strain dynamic range of >0.6% can be achieved.
AB - Slope-assisted Brillouin optical correlation-domain reflectometry (SA-BOCDR) is one of the high-speed distributed strain sensing techniques, but its strain dynamic range has been limited to approximately 0.15%, which is far from being sufficient for some practical applications. In this paper, we clarify that, unlike widely used time-domain techniques, SA-BOCDR has a trade-off relation between the strain dynamic range and the spatial resolution. This trade-off originates from the unique bell-shaped noise floor inherently involved in the Brillouin gain spectrum observed with correlation-domain techniques. We experimentally show that, at the cost of three times lowered spatial resolution, the strain dynamic range of >0.6% can be achieved.
KW - Brillouin scattering
KW - distributed optical fiber sensor
KW - strain dynamic range
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U2 - 10.1088/1361-6501/ab22ec
DO - 10.1088/1361-6501/ab22ec
M3 - Article
AN - SCOPUS:85068958818
VL - 30
JO - Measurement Science and Technology
JF - Measurement Science and Technology
SN - 0957-0233
IS - 7
M1 - 075204
ER -