AEI Hannover, (MPI für Gravitationsphysik und Leibniz Universität Hannover),Callinstrasse 38, 30167 Hannover, Germany.
Opt Lett. 2010 Feb 1;35(3):435-7. doi: 10.1364/OL.35.000435.
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.
激光干涉空间天线（LISA）干涉引力波探测器需要以相位调制边带的形式在其三个航天器之间传输时钟信息。出于这个原因，载波和边带之间的光链引入的相位噪声必须低。我们已经测量了发射功率高达 2 W 的掺镱光纤放大器的这种差分相位噪声。对于 LISA 需要的 1 W 的输出功率，测量的差分相位噪声在其要求范围内。对于 2 W 的输出功率，放大器表现出受激布里渊散射，并且显示出高达 15 倍更高的差分相位噪声系数。还测量了放大器的工作参数和光长噪声的依赖性。
