TY - GEN
T1 - Quasi-distributed fiber sensing via perfect periodic Legendre codes
AU - Arbel, N.
AU - Shiloh, L.
AU - Levanon, N.
AU - Eyal, A.
N1 - Publisher Copyright:
© 2021 The Author(s).
PY - 2020
Y1 - 2020
N2 - Long-range Rayleigh-based Distributed Acoustic Sensing (DAS) systems are often limited in their sensitivity and bandwidth. The former limitation is a result of the low backscattered power and poor dynamic-strain to optical-phase transduction efficiency. The latter constraint results from the trade-off between range and scan-rate which limits the sampling interval to the longest delay in the sensing fiber. Quasi-DAS (Q-DAS) can yield enhanced sensitivity but may still suffer from low backscattered power and low scan-rate for longhaul, many-sensor, systems. In this work we study the use of Perfect Periodic Correlation codes for interrogating a long-haul Q-DAS system. It is shown that judicious choice of the code parameters allows order of magnitude increase in detection bandwidths and in the power reflected from each sensor.
AB - Long-range Rayleigh-based Distributed Acoustic Sensing (DAS) systems are often limited in their sensitivity and bandwidth. The former limitation is a result of the low backscattered power and poor dynamic-strain to optical-phase transduction efficiency. The latter constraint results from the trade-off between range and scan-rate which limits the sampling interval to the longest delay in the sensing fiber. Quasi-DAS (Q-DAS) can yield enhanced sensitivity but may still suffer from low backscattered power and low scan-rate for longhaul, many-sensor, systems. In this work we study the use of Perfect Periodic Correlation codes for interrogating a long-haul Q-DAS system. It is shown that judicious choice of the code parameters allows order of magnitude increase in detection bandwidths and in the power reflected from each sensor.
UR - http://www.scopus.com/inward/record.url?scp=85136826041&partnerID=8YFLogxK
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AN - SCOPUS:85136826041
T3 - Optics InfoBase Conference Papers
BT - Optical Fiber Sensors, OFS 2020
PB - Optica Publishing Group (formerly OSA)
T2 - 27th International Conference on Optical Fiber Sensors, OFS 2020
Y2 - 8 June 2020 through 12 June 2020
ER -