In this paper, we report on the development progress of correlation-based optical time domain reflectometry (OTDR). Substituting the direct detection receiver with a coherent receiver enables to extract the phase and polarization information of the reflected signal. Furthermore, due to the mixing of a weak probe signal with a strong local oscillator the sensitivity of the receiver improved. This improvement was demonstrated by analyzing the reflection from an angled physical contact (APC) connector. To further quantify the improvements, we compare the direct detection correlation OTDR (C-OTDR) with the coherent detection correlation OTDR (CC-OTDR) with respect to the spatial and amplitude resolution.
@article{arxiv.2209.14736,
title = {Distributed Sensing of Single Mode Fibers with Correlation Techniques},
author = {Florian Azendorf and André Sandmann and Michael Eiselt and Bernhard Schmauss},
journal= {arXiv preprint arXiv:2209.14736},
year = {2022}
}
Comments
This work was partly funded by the German Federal Ministry of Education and Research (FKZ16KIS1279K) in the framework of the CELTIC-NEXT project AI-NET-Protect (Project ID C2019/3-4)