TY - JOUR
T1 - Wide-Dynamic-Range Brillouin Optical Correlation-Domain Reflectometry With 20-kHz Sampling Rate
AU - Zhu, Guangtao
AU - Kishizawa, Kazuya
AU - Noda, Kohei
AU - Lee, Heeyoung
AU - Nakamura, Kentaro
AU - Mizuno, Yosuke
N1 - Funding Information:
This work was supported in part by the Japan Society for the Promotion of Science (JSPS) KAKENHI under Grant 20J22160, Grant 20K22417, and Grant 21H04555; and in part by the research grants from the Noguchi Institute, the Murata Science Foundation, the Telecommunications Advancement Foundation, the Takahashi Industrial and Economic Research Foundation, and the Yazaki Memorial Foundation for Science and Technology
Publisher Copyright:
© 2001-2012 IEEE.
PY - 2022/4/1
Y1 - 2022/4/1
N2 - Brillouin optical correlation-domain reflectometry (BOCDR) is known as one of the distributed fiber-optic strain/temperature sensing techniques. Recently, a high-speed BOCDR configuration with no measurable strain limit has been developed, but only a sampling rate of 50 Hz has been experimentally demonstrated, limited by the use of a commercial microwave frequency sweeper (MFS). In this work, by replacing the MFS with an independent voltage-controlled oscillator driven by a function generator, we experimentally show via vibration detection that this system can achieve a sampling rate of up to 20 kHz. We newly observe the systematic noise peculiar to such high-speed operation, which is found to originate from the unintended intensity modulation of the laser output. We also demonstrate the suppression of this noise by band-elimination filtering.
AB - Brillouin optical correlation-domain reflectometry (BOCDR) is known as one of the distributed fiber-optic strain/temperature sensing techniques. Recently, a high-speed BOCDR configuration with no measurable strain limit has been developed, but only a sampling rate of 50 Hz has been experimentally demonstrated, limited by the use of a commercial microwave frequency sweeper (MFS). In this work, by replacing the MFS with an independent voltage-controlled oscillator driven by a function generator, we experimentally show via vibration detection that this system can achieve a sampling rate of up to 20 kHz. We newly observe the systematic noise peculiar to such high-speed operation, which is found to originate from the unintended intensity modulation of the laser output. We also demonstrate the suppression of this noise by band-elimination filtering.
KW - Brillouin scattering
KW - Optical fiber sensors
KW - dynamic range
KW - high-speed sampling
KW - strain sensing
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U2 - 10.1109/JSEN.2022.3153169
DO - 10.1109/JSEN.2022.3153169
M3 - Article
AN - SCOPUS:85125328338
SN - 1530-437X
VL - 22
SP - 6644
EP - 6650
JO - IEEE Sensors Journal
JF - IEEE Sensors Journal
IS - 7
ER -