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  Matrix Heater in the Gravitational Wave Observatory GEO 600

Wittel, H., Affeldt, C., Bisht, A., Doravari, S., Grote, H., Lough, J., et al. (2018). Matrix Heater in the Gravitational Wave Observatory GEO 600. Optics Express, 26(18), 22687-22697. doi:10.1364/OE.26.022687.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-8E2E-D Version Permalink: http://hdl.handle.net/21.11116/0000-0003-0224-2
Genre: Journal Article

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 Creators:
Wittel, Holger1, Author              
Affeldt, Christoph1, Author              
Bisht, Aparna, Author
Doravari, Suresh1, Author              
Grote, Hartmut1, Author              
Lough, James1, Author              
Lück, Harald1, Author              
Schreiber, Emil1, Author              
Strain, Kenneth A.1, Author              
Danzmann, Karsten1, Author              
Affiliations:
1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              

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Free keywords: Astrophysics, Instrumentation and Methods for Astrophysics, astro-ph.IM
 Abstract: Large scale laser interferometric gravitational wave detectors (GWDs), such as GEO 600 require high quality optics to reach their design sensitivity. The inevitable surface imperfections, inhomogeneities and light-absorption induced thermal lensing in the optics can convert laser light from the fundamental mode to unwanted higher order modes, and pose challenges to the operation and sensitivity of the GWDs. Here we demonstrate the practical implementation of a thermal projection system which reduces those unwanted effects via targeted spatial heating of the optics. The thermal projector consists of 108 individually addressable heating elements which are imaged onto the beam splitter of GEO 600. We describe the optimization of the spatial heating profile and obtained results.

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 Dates: 2018-06-042018
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: arXiv: 1806.01652
URI: http://arxiv.org/abs/1806.01652
DOI: 10.1364/OE.26.022687
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Title: Optics Express
  Abbreviation : Opt Express
Source Genre: Journal
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Publ. Info: Washington, DC : Optical Society of America
Pages: - Volume / Issue: 26 (18) Sequence Number: - Start / End Page: 22687 - 22697 Identifier: ISSN: 1094-4087
CoNE: https://pure.mpg.de/cone/journals/resource/954925609918