Designing beam compressors for the optical bench interferometer of LISA -a current example of optical simulations
Abstract
Numerous optical simulations which mainly investigated the impact of misalignment to the heterodyne interferometer signals have been performed for LISA Pathfinder in the past years. The simulation work for LISA can only partly be done with the tools that were used for the LISA Pathfinder simulations since not all LISA interferometers interfere beams that can sufficiently be described with a Gaussian TEM00 mode. Nevertheless for those interferometers that interfere local laser beams the tools used for LISA Pathfinder are fully applicable and are currently used to design a beam compressor for the test mass interferometer. This beam compressor shall reduce the size of the laser beams such that they match the small size of the quadrant photodiodes. Even more importantly this beam compressor is getting designed such that it decouples angular misalignment of the beams from the heterodyne longitudinal phase signal. We will present results from our simulations on various beam compressor designs including the amount of residual phase noise due to test mass angular jitter.
- Publication:
-
38th COSPAR Scientific Assembly
- Pub Date:
- 2010
- Bibcode:
- 2010cosp...38.3796W