Quantitative Amplitude Measuring φ-OTDR using a Sequence of Frequency Shifted Pulses

Brandon Redding; Matthew J. Murray

doi:10.1364/OFS.2020.T3.15

Optical Fiber Sensors Conference 2020 Special Edition
OSA Technical Digest (Optica Publishing Group, 2020),
paper T3.15
•https://doi.org/10.1364/OFS.2020.T3.15

Quantitative Amplitude Measuring φ-OTDR using a Sequence of Frequency Shifted Pulses

Brandon Redding and Matthew J. Murray

Optical Fiber Sensors 2020

Washington, DC United States
8–12 June 2020
ISBN: 978-1-55752-307-5

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Poster Session I (T3)

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B. Redding and M. J. Murray, "Quantitative Amplitude Measuring φ-OTDR using a Sequence of Frequency Shifted Pulses," in Optical Fiber Sensors Conference 2020 Special Edition, G. Cranch, A. Wang, M. Digonnet, and P. Dragic, eds., OSA Technical Digest (Optica Publishing Group, 2020), paper T3.15.

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Abstract

We present a -OTDR sensor that recovers quantitative strain information from the Rayleigh backscattering ϕ amplitude of a sequence of frequency-shifted pulses. This approach allows for higher launch power, enabling low-noise $(1.3 p ε / \sqrt{Hz})$ dynamic strain sensing.

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