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  Towards the LISA Backlink: Experiment design for comparing optical phase reference distribution systems

Isleif, K.-S., Bischof, L., Ast, S., Penkert, D., Schwarze, T., Fernandez Barranco, G., et al. (2018). Towards the LISA Backlink: Experiment design for comparing optical phase reference distribution systems. Classical and quantum gravity, 35(8): 085009. doi:10.1088/1361-6382/aaa879.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-1A62-4 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-ED74-1
Genre: Journal Article

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 Creators:
Isleif, Katharina-Sophie1, Author              
Bischof, Lea1, Author              
Ast, Stefan1, Author              
Penkert, Daniel1, Author              
Schwarze, Thomas1, Author              
Fernandez Barranco, Germán1, Author              
Zwetz, Johann Max1, Author              
Veith, Sonja1, Author
Hennig, Jan-Simon1, Author
Tröbs, Michael1, Author              
Reiche, Jens1, Author              
Gerberding, Oliver1, Author              
Danzmann, Karsten1, Author              
Heinzel, Gerhard1, Author              
Affiliations:
1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              

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Free keywords: Physics, Instrumentation and Detectors, physics.ins-det, Astrophysics, Instrumentation and Methods for Astrophysics, astro-ph.IM, Physics, Optics, physics.optics
 Abstract: LISA is a proposed space-based laser interferometer detecting gravitational waves by measuring distances between free-floating test masses housed in three satellites in a triangular constellation with laser links in-between. Each satellite contains two optical benches that are articulated by moving optical subassemblies for compensating the breathing angle in the constellation. The phase reference distribution system, also known as backlink, forms an optical bi-directional path between the intra-satellite benches. In this work we discuss phase reference implementations with a target non-reciprocity of at most $2\pi\,\mathrm{\mu rad/\sqrt{Hz}}$, equivalent to $1\,\mathrm{pm/\sqrt{Hz}}$ for a wavelength of $1064\,\mathrm{nm}$ in the frequency band from $0.1\,\mathrm{mHz}$ to $1\,\mathrm{Hz}$. One phase reference uses a steered free beam connection, the other one a fiber together with additional laser frequencies. The noise characteristics of these implementations will be compared in a single interferometric set-up with a previously successfully tested direct fiber connection. We show the design of this interferometer created by optical simulations including ghost beam analysis, component alignment and noise estimation. First experimental results of a free beam laser link between two optical set-ups that are co-rotating by $\pm 1^\circ$ are presented. This experiment demonstrates sufficient thermal stability during rotation of less than $10^{-4}\,\mathrm{K/\sqrt{Hz}}$ at $1\,\mathrm{mHz}$ and operation of the free beam steering mirror control over more than 1 week.

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 Dates: 2017-09-192018-01-122018
 Publication Status: Published in print
 Pages: 20 pages, 8 figures, submitted to Classical Quantum Gravity
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 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1709.06515
DOI: 10.1088/1361-6382/aaa879
URI: http://arxiv.org/abs/1709.06515
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Title: Classical and quantum gravity
Source Genre: Journal
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Publ. Info: Bristol, U.K. : Institute of Physics
Pages: - Volume / Issue: 35 (8) Sequence Number: 085009 Start / End Page: - Identifier: ISSN: 0264-9381
CoNE: https://pure.mpg.de/cone/journals/resource/954925513480_1