Photon pressure induced test mass deformation in gravitational-wave detectors

Abstract

A widely used assumption within the gravitational-wave community has so far been that a test mass acts like a rigid body for frequencies in the detection band, i.e. for frequencies far below the first internal resonance. In this article we demonstrate that localized forces, applied for example by a photon pressure actuator, can result in a non-negligible elastic deformation of the test masses. For a photon pressure actuator setup used in the gravitational wave detector GEO600 we measured that this effect modifies the standard response function by 10% at 1 kHz and about 100% at 2.5 kHz.

References in corpus (1)

• Thermoelastic Noise and Homogeneous Thermal Noise in Finite Sized Gravitational-Wave Test Masses

Cited by in corpus (12)

• Calibration of the Advanced LIGO detectors for the discovery of the binary black-hole merger GW150914
• The Advanced LIGO Photon Calibrators
• Precise calibration of LIGO test mass actuators using photon radiation pressure
• Precise Measurement of Laser Power using an Optomechanical System
• Fiducial displacements with improved accuracy for the global network of gravitational wave detectors
• The Advanced Virgo Photon Calibrators
• Accurate calibration of test mass displacement in the LIGO interferometers
• Reconstruction of the gravitational wave signal $h(t)$ during the Virgo science runs and independent validation with a photon calibrator
• Virgo calibration and reconstruction of the gravitational wave strain during VSR1
• Calibration of the LIGO displacement actuators via laser frequency modulation
• Development of advanced photon calibrator for Kamioka gravitational wave detector (KAGRA)
• Particle Physics with Gravitational Wave Detector Technology