Local-oscillator noise coupling in balanced homodyne readout for advanced gravitational wave detectors

Steinlechner, S. et al. (2015) Local-oscillator noise coupling in balanced homodyne readout for advanced gravitational wave detectors. Physical Review D, 92(7), 072009. (doi: 10.1103/PhysRevD.92.072009)

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The second generation of interferometric gravitational wave detectors are quickly approaching their design sensitivity. For the first time these detectors will become limited by quantum backaction noise. Several backaction evasion techniques have been proposed to further increase the detector sensitivity. Since most proposals rely on a flexible readout of the full amplitude- and phase-quadrature space of the output light field, balanced homodyne detection is generally expected to replace the currently used DC readout. Up to now, little investigation has been undertaken into how balanced homodyne detection can be successfully transferred from its ubiquitous application in tabletop quantum optics experiments to large-scale interferometers with suspended optics. Here we derive implementation requirements with respect to local-oscillator noise couplings and highlight potential issues with the example of the Glasgow Sagnac Speed Meter experiment, as well as for a future upgrade to the Advanced LIGO detectors.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Pascucci, Daniela and Bell, Dr Angus and Hild, Professor Stefan and Barr, Dr Bryan and Sorazu Lucio, Dr Borja and Leavey, Mr Sean and Wright, Ms Jennifer and Houston, Mr Ewan and Graef, Dr Christian and Danilishin, Dr Stefan and Hennig, Mr Jan-Simon and Steinlechner, Dr Sebastian and Huttner, Dr Sabina and Strain, Professor Kenneth
Authors: Steinlechner, S., Barr, B. W., Bell, A. S., Danilishin, S. L., Gläfke, A., Gräf, C., Hennig, J.-S., Houston, E. A., Huttner, S. H., Leavey, S. S., Pascucci, D., Sorazu, B., Spencer, A., Strain, K., Wright, J., and Hild, S.
College/School:College of Science and Engineering > School of Physics and Astronomy
Research Centre:College of Science and Engineering > School of Physics and Astronomy > Institute for Gravitational Research
Journal Name:Physical Review D
Publisher:American Physical Society
ISSN (Online):1550-2368
Copyright Holders:Copyright © 2015 The Authors
First Published:First published in American Physical Society 92(7):072009
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
624341Investigations in Gravitational Radiation / Particle Astrophysics Capital equipmentSheila RowanScience & Technologies Facilities Council (STFC)ST/L000946/1S&E P&A - PHYSICS & ASTRONOMY