Multi-spatial-mode effects in squeezed-light-enhanced interferometric gravitational wave detectors

2017/07/13 by Daniel Töyrä, Daniel Brown, Daniel D. Brown +9 · 5 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Pulsars and Gravitational Waves Research #Advanced Fiber Laser Technologies

paper · pdf · doi:10.1103/physrevd.96.022006

Abstract

Proposed near-future upgrades of the current advanced interferometric gravitational wave detectors include the usage of frequency dependent squeezed light to reduce the current sensitivity-limiting quantum noise. We quantify and describe the degradation effects that spatial mode-mismatches between optical resonators have on the squeezed field. These mode-mismatches can to first order be described by scattering of light into second-order Gaussian modes. As a demonstration of principle, we also show that squeezing the second-order Hermite-Gaussian modes HG₀₂ and HG₂₀, in addition to the fundamental mode, has the potential to increase the robustness to spatial mode-mismatches. This scheme, however, requires independently optimised squeeze angles for each squeezed spatial mode, which would be challenging to realise in practise.

Cited by

• Sensitivity of Laguerre-Gaussian Modes to Misalignment and Mode Mismatch in Gravitational-Wave Detectors
• Hyperloss from coherent spatial-mode mixing in quantum-correlated networks
• An optical lock-in camera for advanced gravitational wave interferometers
• A matter of perspective: how nanoscale optical defects limit cosmic-scale gravitational wave observations
• Robust squeezed light against mode mismatch using a self imaging optical parametric oscillator. [europepmc]

Related

• Performance of multiple filter-cavity schemes for frequency-dependent squeezing in gravitational-wave detectors
• Characterization and evasion of backscattered light in the squeezed-light enhanced gravitational wave interferometer GEO 600
• Reduction of quantum noise and increase of amplification of gravitational waves signals in Michelson interferometer by the use of squeezed states
• Single and coupled cavity mode sensing schemes using a diagnostic field
• The use of squeezed states and balanced homodyne for detecting gravitational waves