  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.
