The Influence of Dual-Recycling on Parametric Instabilities at Advanced LIGO

Abstract

Laser interferometers with high circulating power and suspended optics, such as the LIGO gravitational wave detectors, experience an optomechanical coupling effect known as a parametric instability: the runaway excitation of a mechanical resonance in a mirror driven by the optical field. This can saturate the interferometer sensing and control systems and limit the observation time of the detector. Current mitigation techniques at the LIGO sites are successfully suppressing all observed parametric instabilities, and focus on the behaviour of the instabilities in the Fabry-Perot arm cavities of the interferometer, where the instabilities are first generated. In this paper we model the full dual-recycled Advanced LIGO design with inherent imperfections. We find that the addition of the power- and signal-recycling cavities shapes the interferometer response to mechanical modes, resulting in up to four times as many peaks. Changes to the accumulated phase or Gouy phase in the signal-recycling cavity have a significant impact on the parametric gain, and therefore which modes require suppression.

9 pages, 11 figures, 2 ancillary files

References in corpus (11)

• Observation of Gravitational Waves from a Binary Black Hole Merger
• GW150914: The Advanced LIGO Detectors in the Era of First Discoveries
• Observation of Parametric Instability in Advanced LIGO
• Damping parametric instabilities in future gravitational wave detectors by means of electrostatic actuators
• Observation of Three Mode Parametric Interactions in Long Optical Cavities
• First Demonstration of Electrostatic Damping of Parametric Instability at Advanced LIGO
• Analysis of Parametric Oscillatory Instability in Signal Recycled LIGO Interferometer
• Parametric Instability in Long Optical Cavities and Suppression by Dynamic Transverse Mode Frequency Modulation
• Observation of the Three-Mode Parametric Instability
• Time evolution of parametric instability in large-scale gravitational-wave interferometers
• A novel concept for increasing the peak sensitivity of LIGO by detuning the arm cavities

Cited by in corpus (4)

• Review of the Advanced LIGO gravitational wave observatories leading to observing run four
• Implications of the Quantum Noise Target for the Einstein Telescope Infrastructure Design
• Towards optomechanical parametric instabilities prediction in ground-based gravitational wave detectors
• Extending Ground-Based Gravitational-Wave Sensitivity to 5 Hz