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First Long-Term Application of Squeezed States of Light in a Gravitational-Wave Observatory | | H. Grote
; K. Danzmann
; K.L. Dooley
; R. Schnabel
; J. Slutsky
; H. Vahlbruch
; | | Date: |
9 Feb 2013 | | Abstract: | In this work 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 GEO600 during a period of three months from June to
August 2011, where GEO600 was performing an observational run together with the
French/Italian Virgo detector. Then, after a short interruption, squeezing
application continued for about 11 months from November 2011 to October 2012.
During this time, squeezed vacuum could be applied for 90.2% (205.2 days total)
of the time when science-quality data was acquired with GEO,600. The average
gain in sensitivity from squeezed vacuum application in this period was 26%
(2.0dB), as measured in the frequency band from 3.7 to 4.0kHz, corresponding to
a factor of two increase in observed volume of the universe. We show that the
glitch-rate of the detector did not increase from squeezing application,
confirming the long-term usability of squeezed states. Squeezed vacuum states
of light have arrived as a permanent application. | | Source: | arXiv, 1302.2188 | | Services: | Forum | Review | PDF | Favorites | |
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