Add to BibSonomy
Abstract
Advanced laser interferometer gravitational-wave detectors use high laser power to achieve design sensitivity. A small part of this power is absorbed in the interferometer cavity mirrors where it creates thermal lenses, causing aberrations in the main laser beam that must be minimized by the actuation of “ring heaters,” which are additional heater elements that are aimed to reduce the temperature gradients in the mirrors. In this article we derive the first, to the best of our knowledge, analytical model of the temperature field generated by an ideal ring heater. We express the resulting optical aberration contribution to the main laser beam in this axisymmetric case. Used in conjunction with wavefront measurements, our model provides a more complete understanding of the thermal state of the cavity mirrors and will allow a more efficient use of the ring heaters in the Advanced Laser Interferometer Gravitational-wave Observatory.
© 2016 Optical Society of America
Full Article | PDF ArticleMore Like This
H. Wittel, C. Affeldt, A. Bisht, S. Doravari, H. Grote, J. Lough, H. Lück, E. Schreiber, K. A. Strain, and K. Danzmann
Opt. Express 26(18) 22687-22697 (2018)
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, and Phil Willems
Appl. Opt. 55(29) 8256-8265 (2016)
L. Pinard, C. Michel, B. Sassolas, L. Balzarini, J. Degallaix, V. Dolique, R. Flaminio, D. Forest, M. Granata, B. Lagrange, N. Straniero, J. Teillon, and G. Cagnoli
Appl. Opt. 56(4) C11-C15 (2017)