Techniques in the optimization of length sensing and control systems for a three-mirror coupled cavity

Huttner, S.H., Barr, B.W. , Taylor, J.R., Plissi, M.V., Sorazu, B. and Strain, K.A. (2008) Techniques in the optimization of length sensing and control systems for a three-mirror coupled cavity. Classical and Quantum Gravity, 25(23), p. 235003. (doi: 10.1088/0264-9381/25/23/235003)

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The control of coupled cavity systems, as employed in interferometric gravitational wave detectors, depends to a large extent on the design and optimization of sensing systems that can correctly read out the length and angle degrees of freedom. As interferometer configurations become more complex, and new sensing schemes are introduced, it is important to ensure that methods are available to optimize the system parameters to allow the experimental realization to match the theoretical design. In an experimental test, on a suitable model apparatus, we show that currently available numerical modelling tools allow the development and implementation of reliable methods of setting the key system parameters. Here we present an example technique showing how these parameters can be optimized and compare the numerical model with the experimental reality. The effects of mode-matching and misalignment on the sensing signals and on the process of optimizing them are also considered.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Barr, Dr Bryan and Sorazu Lucio, Dr Borja and Huttner, Dr Sabina and Strain, Professor Kenneth
Authors: Huttner, S.H., Barr, B.W., Taylor, J.R., Plissi, M.V., Sorazu, B., and Strain, K.A.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Classical and Quantum Gravity
Publisher:Institute of Physics Publishing Ltd.
ISSN (Online):1361-6382
Published Online:12 November 2008

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
459312Investigations in Gravitational Radiation.Sheila RowanScience & Technologies Facilities Council (STFC)ST/I001085/1Physics and Astronomy