TY - JOUR
T1 - Compensation of noise floor distortion in long-range simplified optical correlation-domain reflectometry without the use of electrical spectrum analyzer
AU - Zhu, Guangtao
AU - Miyamae, Tomoya
AU - Takahashi, Hiroshi
AU - Noda, Kohei
AU - Lee, Heeyoung
AU - Nakamura, Kentaro
AU - Mizuno, Yosuke
N1 - Funding Information:
This work was partially supported by the Japan Society for the Promotion of Science (JSPS) KAKENHI (Grant Nos. 21H04555, 22K14272, and 20J22160) and the research grants from the Takahashi Industrial and Economic Research Foundation, the Yazaki Memorial Foundation for Science and Technology, and the Konica Minolta Science and Technology Foundation.
Publisher Copyright:
© 2023 The Japan Society of Applied Physics.
PY - 2023/1
Y1 - 2023/1
N2 - In simplified optical correlation-domain reflectometry (OCDR) without the use of an electrical spectrum analyzer (ESA), the noise floor of the reflectivity distribution is distorted in long-range measurement, which sometimes causes significant errors in the distributed reflectivity measurement. Herein, we experimentally analyze the distorted noise floor by high-speed ESA-free OCDR and clarify the origin of the noise floor. Then we show that this noise floor can be compensated by appropriate filtering. Consequently, distributed reflectivity measurement over a 1.1 km long sensing fiber is properly performed at a repetition rate of 100 Hz.
AB - In simplified optical correlation-domain reflectometry (OCDR) without the use of an electrical spectrum analyzer (ESA), the noise floor of the reflectivity distribution is distorted in long-range measurement, which sometimes causes significant errors in the distributed reflectivity measurement. Herein, we experimentally analyze the distorted noise floor by high-speed ESA-free OCDR and clarify the origin of the noise floor. Then we show that this noise floor can be compensated by appropriate filtering. Consequently, distributed reflectivity measurement over a 1.1 km long sensing fiber is properly performed at a repetition rate of 100 Hz.
KW - correlation-domain sensing
KW - distributed reflectivity measurement
KW - noise floor
KW - optical fiber sensors
KW - system simplification
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U2 - 10.35848/1882-0786/aca4ba
DO - 10.35848/1882-0786/aca4ba
M3 - Article
AN - SCOPUS:85146722890
SN - 1882-0778
VL - 16
JO - Applied Physics Express
JF - Applied Physics Express
IS - 1
M1 - 012013
ER -