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

Research output: Contribution to journalArticlepeer-review


  • Daniel Töyrä
  • McKenna Davis
  • Shicong Song
  • Alex Wormald
  • Jan Harms

Colleges, School and Institutes


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 $\mathrm{HG}_{02}$ and $\mathrm{HG}_{20}$, in addition to the fundamental mode, has the potential to increase the robustness to spatial mode-mismatches. This scheme, however, requires independently optimized squeeze angles for each squeezed spatial mode, which would be challenging to realise in practise.

Bibliographic note

10 pages, 12 figures


Original languageEnglish
Article number022006
JournalPhysical Review D (Particles, Fields, Gravitation and Cosmology)
Issue number2
Publication statusPublished - 13 Jul 2017


  • physics.optics, quant-ph