Experimental demonstration of reduced tilt-to-length coupling by a two-lens imaging system

The coupling between beam tilt and longitudinal path length readout in a setup representing a LISA test mass interferometer was reduced to below 2 µm/rad using a two lens imaging system. This was achieved by the use of a homodyne equal arm-length Mach-Zehnder interferometer and suppression of the do...

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Bibliographic Details
Published in:Optics express 2016-05, Vol.24 (10), p.10466-10475
Main Authors: Schuster, Sönke, Tröbs, Michael, Wanner, Gudrun, Heinzel, Gerhard
Format: Article
Language:English
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Summary:The coupling between beam tilt and longitudinal path length readout in a setup representing a LISA test mass interferometer was reduced to below 2 µm/rad using a two lens imaging system. This was achieved by the use of a homodyne equal arm-length Mach-Zehnder interferometer and suppression of the dominating effects of higher order Gaussian modes and longitudinal actuator movement. The latter was subtracted using the phase signal of a large single element photo diode.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.24.010466