Long-Term Latency Measurement of Deployed Fiber

TL;DR

This paper presents a method using Correlation-OTDR to measure the latency of deployed fiber optic cables and analyze how temperature variations affect their performance over time.

Contribution

It introduces a novel approach for long-term latency measurement and temperature coefficient estimation of deployed fiber using Correlation-OTDR technology.

Findings

Annual temperature variation of 25K estimated for deployed fiber

Latency measurement technique demonstrated effectiveness over long periods

Temperature changes significantly impact fiber latency

Abstract

Using a Correlation-OTDR we measured the latency of fibers in a deployed cable and calculated the time coefficient of the fiber temperature changes. Annual temperature variations of 25K were estimated for the deployed fiber.