Quantum Noise Limited Temperature-Change Estimation for Phase-OTDR Employing Coherent Detection

TL;DR

This paper establishes the fundamental quantum limit for temperature-change estimation in phase-OTDR sensing systems using coherent detection, highlighting the ultimate precision bound imposed by quantum noise.

Contribution

It derives and demonstrates the first quantum limit specifically for temperature-change estimation in coherent phase-OTDR systems, advancing the understanding of quantum noise constraints.

Findings

Derived the quantum limit for temperature estimation in phase-OTDR.

Demonstrated the quantum limit through theoretical analysis.

Highlights the fundamental noise bound in quantum sensing systems.

Abstract

The quantum limit is a fundamental lower bound on the uncertainty when estimating a parameter in a system dominated by the minimum amount of noise (quantum noise). For the first time, we derive and demonstrate a quantum limit for temperature-change estimation for coherent phase-OTDR sensing-systems.