2015
DOI: 10.1103/physrevlett.114.161102
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Observation of Parametric Instability in Advanced LIGO

Abstract: Parametric instabilities have long been studied as a potentially limiting effect in high-power interferometric gravitational wave detectors. Until now, however, these instabilities have never been observed in a kilometer-scale interferometer. In this Letter, we describe the first observation of parametric instability in a gravitational wave detector, and the means by which it has been removed as a barrier to progress.

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Cited by 108 publications
(88 citation statements)
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“…Parametric oscillatory is a serious problem for gravitational wave detectors, and thus you must have information about the combinations of the optical Stokes and elastic modes that may be candidates for PI [7][8][9][10][11][12][13][14]. The first observation of PI on the Advanced LIGO detectors has been made in 2015 [15], thereby fully confirming the prediction of Braginsky et al [4].…”
Section: Introductionmentioning
confidence: 78%
“…Parametric oscillatory is a serious problem for gravitational wave detectors, and thus you must have information about the combinations of the optical Stokes and elastic modes that may be candidates for PI [7][8][9][10][11][12][13][14]. The first observation of PI on the Advanced LIGO detectors has been made in 2015 [15], thereby fully confirming the prediction of Braginsky et al [4].…”
Section: Introductionmentioning
confidence: 78%
“…It is interesting to also consider the performance if the arm cavity power was reduced to 200kW, since high optical power is one of the greatest technical challenges. It is well known that high power introduces thermal aberrations (Zhao et al 2006) and can cause parametric instability (Zhao et al 2005Evans et al 2015). The value of 200kW is chosen because it is comparable to the power levels already achieved in aLIGO.…”
Section: An 8km Detector Operating At Low Optical Powermentioning
confidence: 99%
“…Soon thereafter, dynamical backaction cooling, an effect Braginsky predicted [6] to occur for red-detuned laser excitation, was demonstrated [7][8][9]. Although the parametric instability was first analyzed for a single electromagnetic mode coupled to a mechanical oscillator, the effect can also occur for multi-mode systems in which modes are spaced by the mechanical frequencies [10], a scenario in which the parametric oscillator stability in advanced LIGO at the Livingston observatory [11] was observed. Although undesirable in the context of LIGO, the ability to amplify and cool mechanical motion using dynamical backaction is at the heart of the advances in cavity opto-and electromechanics over the past decade [12] that have enabled mechanical systems to be controlled at the quantum level.…”
mentioning
confidence: 99%