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          Institute: MPI für Gravitationsphysik     Collection: Laser Interferometry & Gravitational Wave Astronomy     Display Documents

ID: 435376.0, MPI für Gravitationsphysik / Laser Interferometry & Gravitational Wave Astronomy
Lasers for LISA: overview and phase characteristics
Authors:Tröbs, M.; Barke, S.; Möbius, J.; Engelbrecht, M.; Kracht, D.; d'Arcio, L.; Heinzel, G.; Danzmann, K.
Date of Publication (YYYY-MM-DD):2009
Title of Journal:Journal of Physics: Conference Series
Sequence Number of Article:012016
Review Status:not specified
Audience:Not Specified
Abstract / Description:We have investigated two alternative laser systems for the Laser Interferometer Space Antenna (LISA). One consisted of the laser of LISA's technology precursor LISA Pathfinder and a fiber amplifier originally designed for a laser communication terminal onboard TerraSar-X. The other consisted of a commercial fiber distributed feedback (DFB) laser seeding a fiber amplifier. We have shown that the TerraSar-X amplifier can emit more than 1 W without the onset of stimulated Brillouin scattering as required by LISA. We have measured power noise and frequency noise of the LISA Pathfinder laser (LPL) and the fiber laser. The fiber laser shows comparable or even lower power noise than the LPL. LISA will use electro-optical modulators (EOMs) between seed laser and amplifier for clock noise comparison between spacecraft. This scheme requires that the excess noise added by the amplifiers be negligible. We have investigated the phase characteristics of two fiber amplifiers emitting 1 W and found them to be compatible with the LISA requirement on amplifier differential phase noise.
External Publication Status:published
Document Type:Article
Communicated by:Karsten Danzmann
Affiliations:MPI für Gravitationsphysik/Laser Interferometry & Gravitational Wave Astronomy
Identifiers:ISI:10732359 [ID No:1]
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