Hannover 2010 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 35: Precision Measurements and Metrology IV
Q 35.3: Vortrag
Mittwoch, 10. März 2010, 17:00–17:15, A 310
Optical Bench Development for LISA — •Dennis Weise1, David Robertson2, Henry Ward2, Michael Tröbs3, Gerhard Heinzel3, Karsten Danzmann3, Joep Pijnenburg4, Harm Hogenhuis4, and Luigi d’Arcio5 — 1Astrium GmbH — 2Glasgow University — 3Albert-Einstein Institute — 4TNO Science and Industry — 5ESA/ESTEC
Under ESA contract, a team of Astrium GmbH as prime contractor, the University of Glasgow, the Albert-Einstein Institute, and TNO is developing an Elegant Breadboard of the Optical Bench for the future Laser Interferometer Space Antenna (LISA) Mission. For detection and characterization of gravitational waves between 3 × 10−5 and 1 Hz, LISA will be implemented in a triangular constellation of 3 identical spacecraft, linked by heterodyne laser interferometry in an active transponder scheme over a 5 million kilometer distance. For each laser link, the Optical Bench realizes both remote and local beam metrology with respect to inertial proof masses inside the spacecraft, as well as various ancillary functions such as point-ahead correction, acquisition sensing, transmit beam conditioning, laser redundancy switching, etc.
The purpose of this project is a comprehensive demonstration of the Optical Bench functions, including in particular Nanoradian and Picometer optical metrology in the required degrees of freedom. We will give an overview of the development approach, the planned optical layout and design of the Optical Bench, the special equipment required for integration and verification, and introduce the pre-experiments used for prior validation of the technical concepts.