2 June 2014 Characterization of fast acoustic wave propagation using OFDR with double interrogation and frequency tracking
Author Affiliations +
Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91576R (2014) https://doi.org/10.1117/12.2059601
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain
Abstract
A highly sensitive OFDR system capable of detecting and tracking fast acoustic wave propagation is described. The system was tested by dropping a screw (50gr) and a paperclip (<5gr) at one end of an 18m PVC pipe. The sensing fiber detected the wave propagation (v ≈ 1750m/s) along the entire pipe. Fast phase variations due to the impact of the screw led to a transient shift in the frequency of the interrogating light which corrupted the observed response. By tracking the beat frequencies of predefined reflectors and extracting their amplitudes significant improvement in the system's output was obtained.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Haniel Gabai, Haniel Gabai, Avishay Eyal, Avishay Eyal, } "Characterization of fast acoustic wave propagation using OFDR with double interrogation and frequency tracking", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91576R (2 June 2014); doi: 10.1117/12.2059601; https://doi.org/10.1117/12.2059601
PROCEEDINGS
4 PAGES


SHARE
Back to Top