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  Design and construction of an optical test bed for LISA imaging systems and tilt-to-length coupling

Chwalla, M., Danzmann, K., Fernández Barranco, G., Fitzsimons, E., Gerberding, O., Heinzel, G., et al. (2016). Design and construction of an optical test bed for LISA imaging systems and tilt-to-length coupling. Classical and Quantum Gravity, 33(24): 245015. doi:10.1088/0264-9381/33/24/245015.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-4BD5-C Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-D9CD-7
Genre: Journal Article

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 Creators:
Chwalla, Michael, Author
Danzmann, Karsten1, Author              
Fernández Barranco, Germán1, Author              
Fitzsimons, Ewan, Author
Gerberding, Oliver1, Author              
Heinzel, Gerhard1, Author              
Killow, Christian J, Author
Lieser, Maike, Author
Perreur-Lloyd, Michael, Author
Robertson, David I, Author
Schuster, Sönke, Author
Schwarze, Thomas S, Author
Tröbs, Michael1, Author              
Ward, Henry, Author
Zwetz, Max, Author
Affiliations:
1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, escidoc:24010              

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Free keywords: Astrophysics, Instrumentation and Methods for Astrophysics, astro-ph.IM, Physics, Instrumentation and Detectors, physics.ins-det, Physics, Optics, physics.optics
 Abstract: The Laser Interferometer Space Antenna (LISA) is a future space-based interferometric gravitational-wave detector consisting of three spacecraft in a triangular configuration. The interferometric measurements of path length changes between satellites will be performed on optical benches in the satellites. Angular misalignments of the interfering beams couple into the length measurement and represent a significant noise source. Imaging systems will be used to reduce this tilt-to-length coupling. We designed and constructed an optical test bed to experimentally investigate tilt-to-length coupling. It consists of two separate structures, a minimal optical bench and a telescope simulator. The minimal optical bench comprises the science interferometer where the local laser is interfered with light from a remote spacecraft. In our experiment, a simulated version of this received beam is generated on the telescope simulator. The telescope simulator provides a tilting beam, a reference interferometer and an additional static beam as a phase reference. The tilting beam can either be a flat-top beam or a Gaussian beam. We avoid tilt-to-length coupling in the reference interferometer by using a small photo diode placed at an image of the beam rotation point. We show that the test bed is operational with an initial measurement of tilt-to-length coupling without imaging systems. Furthermore, we show the design of two different imaging systems whose performance will be investigated in future experiments.

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 Dates: 2016-07-012016-12-022016
 Publication Status: Published in print
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 Identifiers: arXiv: 1607.00408
DOI: 10.1088/0264-9381/33/24/245015
URI: http://arxiv.org/abs/1607.00408
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Title: Classical and Quantum Gravity
Source Genre: Journal
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Pages: - Volume / Issue: 33 (24) Sequence Number: 245015 Start / End Page: - Identifier: -