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

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 o...

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Published in:arXiv.org 2017-07
Main Authors: Töyrä, Daniel, Brown, Daniel D, McKenna, Davis, Song, Shicong, Wormald, Alex, Harms, Jan, Miao, Haixing, Freise, Andreas
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Brown, Daniel D
McKenna, Davis
Song, Shicong
Wormald, Alex
Harms, Jan
Miao, Haixing
Freise, Andreas
description 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.
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subjects Detectors
Gravitational effects
Gravitational waves
Hermite-Gaussian modes
Interferometry
Noise sensitivity
Optical resonators
title Multi-spatial-mode effects in squeezed-light-enhanced interferometric gravitational wave detectors
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