Readout for intersatellite laser interferometry: Measuring low frequency phase fluctuations of high-frequency signals with microradian precision.

  title={Readout for intersatellite laser interferometry: Measuring low frequency phase fluctuations of high-frequency signals with microradian precision.},
  author={Oliver Gerberding and Christian Diekmann and Joachim Kullmann and Michael Tr{\"o}bs and Ioury Bykov and Simon Barke and Nils Christopher Brause and Juan Jose Esteban Delgado and Thomas S. Schwarze and Jens Reiche and Karsten Danzmann and Torben Rasmussen and Torben Vendt Hansen and Anders Enggaard and S{\o}ren M{\o}ller Pedersen and O. Jennrich and Martin Suess and Zoran Sodnik and Gerhard Heinzel},
  journal={The Review of scientific instruments},
  volume={86 7},
Precision phase readout of optical beat note signals is one of the core techniques required for intersatellite laser interferometry. Future space based gravitational wave detectors like eLISA require such a readout over a wide range of MHz frequencies, due to orbit induced Doppler shifts, with a precision in the order of μrad/√Hz at frequencies between 0.1 mHz and 1 Hz. In this paper, we present phase readout systems, so-called phasemeters, that are able to achieve such precisions and we… Expand

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