Elimination of Clock Jitter Noise in Spaceborn Laser Interferometers

Details Elimination of Clock Jitter Noise in Spaceborn Laser Interferometers Elimination of Clock Jitter Noise in Spaceborn Laser Interferometers

2000-12-04

arxiv.org/abs/gr-qc/0012013v2

Phys.Rev. D64 (2001) 022002

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

20 pages, 5 figures

Scientific paper

10.1103/PhysRevD.64.022002

Space gravitational wave detectors employing laser interferometry between free-flying spacecraft differ in many ways from their laboratory counterparts. Among these differences is the fact that, in space, the end-masses will be moving relative to each other. This creates a problem by inducing a Doppler shift between the incoming and outgoing frequencies. The resulting beat frequency is so high that its phase cannot be read to sufficient accuracy when referenced to state-of-the-art space-qualified clocks. This is the problem that is addressed in this paper. We introduce a set of time-domain algorithms in which the effects of clock jitter are exactly canceled. The method employs the two-color laser approach that has been previously proposed, but avoids the singularities that arise in the previous frequency-domain algorithms. In addition, several practical aspects of the laser and clock noise cancellation schemes are addressed.

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