Beating the Standard Sensitivity-Bandwidth Limit of Cavity-Enhanced Interferometers with Internal Squeezed-Light Generation.
Beating the Standard Sensitivity-Bandwidth Limit of Cavity-Enhanced Interferometers with Internal Squeezed-Light Generation.
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DOI：
10.1103/physrevlett.118.143601
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发表时间：
2017-02
影响因子：
8.6
通讯作者：
M. Korobko;L. Kleybolte;S. Ast;H. Miao;Yanbei Chen;R. Schnabel
中科院分区：
文献类型：
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作者：
M. Korobko;L. Kleybolte;S. Ast;H. Miao;Yanbei Chen;R. Schnabel
腔增强干涉测量装置（例如引力波探测器）的散粒噪声限制峰值灵敏度可以通过增加腔精细度来改善，即使在比较固定的腔内光功率时也是如此。对于检测器内部的固定光功率，这是以检测带宽成比例减少为代价的。然而，在大跨度的信号频率上的高灵敏度对于天文观测是必不可少的。利用光场中的非经典相关性可以克服这个标准的灵敏度带宽限制。在这里，我们调查的内部压缩的方法，其中的参量放大过程中创建一个非经典相关直接内部的干涉仪腔。我们从理论上分析了该方法的局限性，并测量了与经典情况相比，灵敏度-带宽乘积增加了36%。据我们所知，这是第一个实验演示的灵敏度带宽产品使用内部压缩的改善，开辟了一个新的一类光机械力传感设备的方式。
The shot-noise limited peak sensitivity of cavity-enhanced interferometric measurement devices, such as gravitational-wave detectors, can be improved by increasing the cavity finesse, even when comparing fixed intracavity light powers. For a fixed light power inside the detector, this comes at the price of a proportional reduction in the detection bandwidth. High sensitivity over a large span of signal frequencies, however, is essential for astronomical observations. It is possible to overcome this standard sensitivity-bandwidth limit using nonclassical correlations in the light field. Here, we investigate the internal squeezing approach, where the parametric amplification process creates a nonclassical correlation directly inside the interferometer cavity. We theoretically analyze the limits of the approach and measure 36% increase in the sensitivity-bandwidth product compared to the classical case. To our knowledge, this is the first experimental demonstration of an improvement in the sensitivity-bandwidth product using internal squeezing, opening the way for a new class of optomechanical force sensing devices.