First Long-Term Application of Squeezed States of Light in a Gravitational-Wave Observatory

被引：283

作者：

Grote, H. ^{[1
]}

Danzmann, K.

Dooley, K. L.

Schnabel, R.

Slutsky, J.

Vahlbruch, H.

机构：

[1] Max Planck Inst Gravitat Phys, Albert Einstein Inst, D-30167 Hannover, Germany

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 18期

基金：

英国科学技术设施理事会;

关键词：

NOISE;

D O I：

10.1103/PhysRevLett.110.181101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：5

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