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Generation and application of strongly squeezed vacuum states of light

强压缩真空光态的产生及应用

基本信息

批准号：
269638877
负责人：
Dr. Henning Vahlbruch
金额：
--
依托单位：
Institut für Gravitationsphysik
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2015
资助国家：
德国
起止时间：
2014-12-31 至 2017-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/269638877?language=en
关键词：
Generation application strongly squeezed vacuum

项目摘要

Squeezed vacuum states of light have been used in a variety of proof-of-principle experiments to reduce the photon counting noise (shot noise). The first long-term application of squeezed-light in quantum metrology has been ongoing since more than two years now in the gravitational wave detector GEO600, Hannover, Germany. This successful squeezed-light application has proven it´s general importance but also indicates the demand for higher generated squeezing levels produced in a less complex and therefore more reliable squeezed-light source setup.This project proposes the generation of squeezed vacuum states of light at a wavelength of 1064nm in a novel standing-wave doubly-resonant squeezing resonator. This topology is expected to provide unprecedented high squeezing levels ranging from audio-band frequencies up to MHz-sideband frequencies with a significantly reduced number of optical components required for the strong squeezing generation. As a consequence, a high reliability of the proposed squeezed light source seems realistic. Furthermore, we propose the application of the generated strongly squeezed states to two important aspects of non-classical laser interferometry. Firstly, the strongly squeezed states will be employed to determine the absolute quantum efficiency of photo diodes in a direct measurement. The precision of this measurement technique based non-classical light will beat the classical (relative) measurement accuracy and will give important insights for a high detection efficiency of squeezed light in many applications. Secondly, squeezed light will be used to demonstrate a non-classical light enhanced laser power stabilization experiment surpassing the quantum limit for the first time.

光的压缩真空态已被用于各种原理验证实验中，以减少光子计数噪声（散粒噪声）。在德国汉诺威的引力波探测器GEO600上，压缩光在量子计量学中的首次长期应用已经进行了两年多。这个成功的压缩光应用已经证明了它的普遍重要性，但也表明了在一个不太复杂，因此更可靠的压缩光源设置产生更高的压缩水平的需求。本项目提出了在一个新的驻波双谐振压缩谐振腔中产生压缩真空态的光在1064 nm的波长。这种拓扑结构预计将提供前所未有的高压缩水平，范围从音频频带频率到MHz边带频率，具有显着减少的数量所需的强压缩生成的光学组件。因此，所提出的压缩光源的高可靠性似乎是现实的。此外，我们还提出了将产生的强压缩态应用于非经典激光干涉测量的两个重要方面。首先，利用强压缩态直接测量光电二极管的绝对量子效率。这种基于非经典光的测量技术的精度将超过经典（相对）测量精度，并将在许多应用中为压缩光的高检测效率提供重要的见解。第二，利用压缩光首次实现了超越量子极限的非经典光增强激光功率稳定实验。