High-Spatial-Resolution Optical Correlation-Domain Reflectometry with 100-km Measurement Range

TL;DR

This paper presents a high-resolution optical correlation-domain reflectometry method using pseudo-random modulation, achieving precise loss and fault location measurements over 100 km of optical fiber in about 20 seconds.

Contribution

The study introduces a novel OCDR technique with PPRM that significantly improves spatial resolution and measurement range for fiber network maintenance.

Findings

Achieved 19 cm spatial resolution over 100 km fiber

Measured loss distribution and reflection points effectively

Measurement time reduced to approximately 20 seconds

Abstract

In the maintenance of optical fiber networks, there is a growing demand for high-precision measurement of optical loss distribution and fault locations over long distances. In this study, we propose an OCDR method incorporating periodic pseudo-random modulation (PPRM), and demonstrate that it enables the acquisition of loss distribution based on Rayleigh scattering and the positions of reflection points in an approximately 100-km optical fiber, with a spatial resolution of about 19 cm and a measurement time of about 20 seconds.