Construction of an optical test-bed for eLISA

11th Edoardo Amaldi Conference on Gravitational Waves

Lieser, Maike^1,2 ; Fitzsimons, E.^4,5 ; Isleif, K.-S.^1,2 ; Killow, C.^3 ; Perreur-Lloyd, M.^3 ; Robertson, D.^3 ; Schuster, S.^1,2 ; Tröbs, M.^1,2 ; Veith, S.^1,2 ; Ward, H.^3 ; Heinzel, G.^1,2 ; Danzmann, K.^1,2

Max Planck Institute for Gravitational Physics, Albert Einstein Institute, Callinstraße 38, Hannover

30167, Germany^1

Leibniz Universitat Hannover, Hannover

30167, Germany^2

Scottish Universities Physics Alliance (SUPA), School of Physics and Astronomy, Institute for Gravitational Research, University of Glasgow, Glasgow

G12 8QQ, United Kingdom^3

Airbus Defense and Space - Space Systems, Friedrichshafen

88039, Germany^4

UK Astronomy Technology Centre, Royal Observatory Edinburgh, Edinburgh

EH9 3HJ, United Kingdom^5

关键词: Back-links;    Imaging optics;    Low expansion;    Mass position;    Optical Bench;    Optical testbed;    Path length;    Technology development;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/716/1/012029/pdf
DOI  :  10.1088/1742-6596/716/1/012029

来源: IOP

【 摘 要 】

In the planned eLISA mission a key part of the system is the optical bench that holds the interferometers for reading out the inter-spacecraft distance and the test mass position. We report on ongoing technology development for the eLISA optical system like the back-link between the optical benches and the science interferometer where the local beam is interfered with the received beam from the distant spacecraft. The focus will be on a setup to investigate the tilt-to-pathlength coupling in the science interferometer. To test the science interferometer in the lab a second bench providing a laser beam and a reference interferometer is needed. We present a setup with two ultra-stable low expansion glass benches and bonded optics. To suppress the tilt-to-pathlength coupling to the required level (few μm/rad) imaging optics are placed in front of the interferometer photo diodes.