Lukens Joseph M, Peters Nicholas A, Pooser Raphael C
Opt Lett. 2016 Dec 1;41(23):5438-5441. doi: 10.1364/OL.41.005438.
Interferometers measure a wide variety of dynamic processes by converting a phase change into an intensity change. Nonlinear interferometers, making use of nonlinear media in lieu of beamsplitters, promise substantial improvement in the quest to reach the ultimate sensitivity limits. Here we demonstrate a new nonlinear interferometer utilizing a single parametric amplifier for mode mixing-conceptually, a nonlinear version of the conventional Michelson interferometer with its arms collapsed together. We observe up to 99.9% interference visibility and find evidence for noise reduction based on phase-sensitive gain. Our configuration utilizes fewer components than previous demonstrations and requires no active stabilization, offering new capabilities for practical nonlinear interferometric-based sensors.
干涉仪通过将相位变化转换为强度变化来测量各种各样的动态过程。非线性干涉仪利用非线性介质代替分束器，有望在追求达到极限灵敏度方面取得显著进展。在此，我们展示了一种新型非线性干涉仪，它利用单个参量放大器进行模式混合——从概念上讲，是传统迈克尔逊干涉仪的非线性版本，其臂合并在一起。我们观察到高达99.9%的干涉可见度，并找到了基于相敏增益的降噪证据。我们的配置比以前的演示使用的组件更少，并且不需要主动稳定，为基于非线性干涉测量的实际传感器提供了新功能。
