A Robust Interferometry Against Imperfections Base on Weak Value Amplification

TL;DR

This paper introduces a novel interferometry scheme combining weak measurement with standard techniques, significantly improving noise robustness and signal quality in high-precision optical measurements.

Contribution

The paper presents a new interferometry method leveraging weak value amplification to enhance noise suppression and robustness against optical imperfections.

Findings

Outperforms standard interferometry in signal-to-noise ratio

Demonstrates robustness against reflection-induced noise

Validates the amplification theory through experiments

Abstract

The optical interferometry has been widely used in various high precision applications. Usually, the minimum precision of an interferometry is limited by various technique noises in practice. To suppress such kind of noises, we propose a novel scheme, which combines the weak measurement with the standard interferometry. The proposed scheme dramatically outperforms the standard interferometry in the signal noise ratio and the robustness against noises caused by the optical elements' reflections and the offset fluctuation between two paths. A proof-of-principle experiment is demonstrated to validate the amplification theory.