Tian Long, Yao Wenxiu, Wu Yimiao, Wang Qingwei, Shen Heng, Zheng Yaohui, Peng Kunchi
Opt Lett. 2023 Aug 1;48(15):3909-3912. doi: 10.1364/OL.487355.
Reversed nonlinear dynamics is predicted to be capable of enhancing the quantum sensing in unprecedented ways. Here, we report the experimental demonstration of a loss-tolerant (external loss) and quantum-enhanced interferometer. Two cascaded optical parametric amplifiers are used to judiciously construct an interferometry with two orthogonal squeezing operation. As a consequence, a weak displacement introduced by a test cavity can be amplified for measurement, and the measured signal-to-noise ratio is better than that of both conventional photon shot-noise limited and squeezed-light assisted interferometers. We further confirm its superior loss-tolerant performance by varying the external losses and comparing with both conventional photon shot-noise limited and squeezed-light assisted configurations, illustrating the potential application in gravitational wave detection.
预计反向非线性动力学能够以前所未有的方式增强量子传感。在此，我们报告了一种抗损耗（外部损耗）且量子增强型干涉仪的实验演示。使用两个级联光学参量放大器精心构建具有两种正交压缩操作的干涉测量法。结果，由测试腔引入的微弱位移可以被放大用于测量，并且测量的信噪比优于传统光子散粒噪声极限干涉仪和压缩光辅助干涉仪。我们通过改变外部损耗并与传统光子散粒噪声极限干涉仪和压缩光辅助配置进行比较，进一步证实了其卓越的抗损耗性能，说明了其在引力波探测中的潜在应用。
