Experimental Demonstration of Reduced Tilt-to-length Coupling by Using Imaging Systems in Precision Interferometers

Michael Tröbs, M. Chwalla,Karsten Danzmann,G. Fernández Barranco,Ewan Fitzsimons,O. Gerberding,Gerhard Heinzel,Christian J. Killow, M. Lieser,Michael Perreur-Lloyd,D. I. Robertson,Sönke Schuster,Thomas S. Schwarze, H. Ward, Max Zwetz

Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series（2017）

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摘要

Angular misalignment of one of the interfering beams in laser interferometers can couple into the interferometric length measurement and is called tilt-to-length (TTL) coupling in the following. In the noise budget of the planned space-based gravitational-wave detector evolved Laser Interferometer Space Antenna (eLISA) [1, 2] TTL coupling is the second largest noise source after shot noise [3].

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