Ultra-low phase noise squeezed vacuum source for gravitational wave detectors

E. Oelker*, G. Mansell, M. Tse, J. Miller, F. Matichard, L. Barsotti, P. Fritschel, D. E. McClelland, M. Evans, N. Mavalvala

*Corresponding author for this work

    Research output: Contribution to journalLetterpeer-review

    53 Citations (Scopus)

    Abstract

    Squeezed states of light are a valuable resource for reducing quantum noise in precision measurements. Injection of squeezed vacuum states has emerged as an important technique for reducing quantum shot noise, which is a fundamental limitation to the sensitivity of interferometric gravitational wave detectors. Realizing the most benefit from squeezed-state injection requires lowering optical losses and also minimizing squeezed quadrature fluctuations-or phase noise-to ensure that the large noise in the antisqueezed quadrature does not contaminate the measurement quadrature. Here, we present an audio band squeezed vacuum source with 1.3+0.7 -0.5 mrad of phase noise. This is a nearly tenfold improvement over previously reported measurements, improving prospects for squeezing enhancements in current and future gravitational wave detectors.

    Original languageEnglish
    Pages (from-to)682-685
    Number of pages4
    JournalOptica
    Volume3
    Issue number7
    DOIs
    Publication statusPublished - 20 Jul 2016

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