Phase noise mitigation by a realistic optical parametric oscillator

TL;DR

This paper explores how a realistic optical parametric oscillator (OPO) can be used to mitigate phase noise in optical fields, improving phase measurement and quantum estimation in noisy environments.

Contribution

It demonstrates that a practical OPO can partially or fully compensate phase noise in two common quantum optics scenarios.

Findings

OPO can mitigate phase diffusion in phase measurement.

OPO can improve quantum phase estimation accuracy.

Partial or full noise compensation achieved with realistic OPOs.

Abstract

We address the exploitation of an optical parametric oscillator (OPO) in the task of mitigating, at least partially, phase noise produced by phase diffusion. In particular, we analyze two scenarios where phase diffusion is typically present. The first one is the measurement of the phase of a noisy optical field, while the second involves a quantum estimation scheme of a phase shift imposed on a noisy probe. In both cases, we prove that an OPO may lead to a partial or full compensation of the noise.