Accurate Single-Ended Measurement of Propagation Delay in Fiber Using Correlation Optical Time Domain Reflectometry

A correlation optical time-domain reflectometry (C-OTDR) method is presented, which measures the propagation delay with an accuracy of a few picoseconds. This accuracy is achieved using a test signal data rate of 10 Gbit/s and employing cross-correlation and pulse fitting techniques. In this paper w...

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Bibliographic Details
Published in:Journal of lightwave technology 2021-09, Vol.39 (18), p.5744-5752
Main Authors: Azendorf, Florian, Dochhan, Annika, Eiselt, Michael H.
Format: Article
Language:English
Subjects:
Accuracy
Correlation
Cross correlation
Delay
Delays
Fiber characterization
group delay
latency
Long fibers
Optical fiber amplifiers
Optical fiber dispersion
optical performance monitoring
optical time domain reflectometry (OTDR)
Optical variables measurement
Propagation
Reflection
Reflectometry
Signal processing
Signal to noise ratio
temperature
Time domain analysis
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Description
Summary:A correlation optical time-domain reflectometry (C-OTDR) method is presented, which measures the propagation delay with an accuracy of a few picoseconds. This accuracy is achieved using a test signal data rate of 10 Gbit/s and employing cross-correlation and pulse fitting techniques. In this paper we introduce and evaluate the basic signal processing steps, investigate the measurement accuracy, and discuss applications for monitoring link delay and chromatic dispersion of long fiber spans as well as temperature sensing applications.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2021.3094247