First Long-Term Application of Squeezed States of Light in a Gravitational-Wave Observatory
First Long-Term Application of Squeezed States of Light in a Gravitational-Wave Observatory
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DOI：
10.1103/physrevlett.110.181101
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发表时间：
2013-05-01
影响因子：
8.6
通讯作者：
Vahlbruch, H.
中科院分区：
文献类型：
--
作者：
Grote, H.;Danzmann, K.;Vahlbruch, H.
我们报告的第一个长期应用的压缩真空态的光，以提高散粒噪声有限的灵敏度的引力波天文台。特别是，在2011年6月至8月的三个月期间，对德国-英国探测器GEO 600施加了压缩真空，当时GEO 600正在与法国-意大利Virgo探测器一起进行观测运行。在第二个时期，挤压应用从2011年11月持续到2012年10月，持续了大约11个月。在此期间，在GEO 600获得科学质量数据的时间中，90.2%（共205.2天）采用了挤压真空。在400 Hz以上的宽带上观察到压缩真空应用的灵敏度增加。在3.7 ~ 4.0 kHz的频带内测定，灵敏度增益的时间平均值为26%（2.0 dB）。这对应于kHz区域（e.）中源的宇宙观测体积增加2倍。例如，在一个实施例中，超新星、磁星）。我们介绍了三种新的技术，使长期应用的压缩光，并表明，毛刺率的检测器没有增加从压缩应用。光的压缩真空态已经成为一种永久的应用，能够增加引力波探测器的天体物理范围。
We report on the first long-term application of squeezed vacuum states of light to improve the shot-noise-limited sensitivity of a gravitational-wave observatory. In particular, squeezed vacuum was applied to the German-British detector GEO 600 during a period of three months from June to August 2011, when GEO 600 was performing an observational run together with the French-Italian Virgo detector. In a second period, the squeezing application continued for about 11 months from November 2011 to October 2012. During this time, squeezed vacuum was applied for 90.2% (205.2 days total) of the time that science-quality data were acquired with GEO 600. A sensitivity increase from squeezed vacuum application was observed broadband above 400 Hz. The time average of gain in sensitivity was 26% (2.0 dB), determined in the frequency band from 3.7 to 4.0 kHz. This corresponds to a factor of 2 increase in the observed volume of the Universe for sources in the kHz region (e. g., supernovae, magnetars). We introduce three new techniques to enable the long-term application of squeezed light, and show that the glitch rate of the detector did not increase from squeezing application. Squeezed vacuum states of light have arrived as a permanent application, capable of increasing the astrophysical reach of gravitational-wave detectors.