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要旨

The Laser Interferometer Space Antenna (LISA) is a spacebased
interferometric gravitational wave detector. In the current baseline
design for the optical bench, the use of polarising optics is foreseen to
separate optical beams. Therefore it is important to investigate the influence
of polarising components on the interferometer sensitivity and validate that
the required picometre stability in the low-frequency band (1 mHz - 1 Hz)
is achievable. This paper discusses the design of the experiment and the
implemented stabilisation loops. A displacement readout fulfilling the
requirement in the whole frequency band is presented. Alternatively, we
demonstrate improvement of the noise performance by implementing
various algorithms in data post-processing, which leads to an additional
robustness for the LISA mission.