Extending the Measurement of True Dynamic Strain via Chirped-Pulse Phase-Sensitive Optical Time Domain Reflectometry to 100’s of Microstrains

It is experimentally demonstrated that a chirped pulse phase-sensitive OTDR can measure large and fast dynamic strains (~100’s of μe, ~100’s of Hz) with SNR of > 24dB. Signal smoothing and impact of error accumulation are also discussed.