Differential phase-noise properties of a ytterbium-doped fiber amplifier for the Laser Interferometer Space Antenna.
The interferometric gravitational-wave detector Laser Interferometer Space Antenna (LISA) needs to transfer clock information among its three spacecraft in the form of phase-modulation sidebands. For this reason phase noise introduced by the optical chain between the carrier and a sideband must be low. We have measured this differential phase noise for a ytterbium-doped fiber amplifier emitting up to 2 W. For 1 W of output power as required for LISA, the measured differential phase noise was within its requirement. For 2 W output power the amplifier exhibited stimulated Brillouin scattering and showed a differential phase-noise factor of up to 15 higher. Dependencies on operating parameters and optical length noise of the amplifier were also measured.
Tröbs
M
M
AEI Hannover, (MPI für Gravitationsphysik und Leibniz Universität Hannover),Callinstrasse 38, 30167 Hannover, Germany. michael.troebs@aei.mpg.de
Barke
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S
Theeg
Th
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Kracht
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Heinzel
G
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Danzmann
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