Overview of Advanced LIGO adaptive optics.

Aidan F Brooks,Benjamin Abbott,Muzammil A Arain,Giacomo Ciani, Ayodele Cole, Greg Grabeel,Eric Gustafson, Chris Guido,Matthew Heintze,Alastair Heptonstall, Mindy Jacobson,Won Kim,Eleanor King, Alexander Lynch, Stephen O'Connor,David Ottaway,Ken Mailand,Guido Mueller,Jesper Munch,Virginio Sannibale, Zhenhua Shao,Michael Smith, Peter Veitch, Thomas Vo,Cheryl Vorvick,Phil Willems

APPLIED OPTICS（2016）

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摘要

This is an overview of the adaptive optics used in Advanced LIGO (aLIGO), known as the thermal compensation system (TCS). The TCS was designed to minimize thermally induced spatial distortions in the interferometer optical modes and to provide some correction for static curvature errors in the core optics of aLIGO. The TCS is comprised of ring heater actuators, spatially tunable CO2 laser projectors, and Hartmann wavefront sensors. The system meets the requirements of correcting for nominal distortion in aLIGO to a maximum residual error of 5.4 nm rms, weighted across the laser beam, for up to 125 W of laser input power into the interferometer. (C) 2016 Optical Society of America

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