Thermal distortions of non-Gaussian beams in Fabry–Perot cavities

DOI10.1088/0264-9381/25/23/235016zbMATH Open1155.83329arXiv1704.03600OpenAlexW2098321335MaRDI QIDQ5302163

Author name not available (Why is that?)

Publication date: 6 January 2009

Published in: Classical and Quantum Gravity (Search for Journal in Brave)

Abstract: Thermal effects are already important in currently operating interferometric gravitational wave detectors. Planned upgrades of these detectors involve increasing optical power to combat quantum shot noise. We consider the ramifications of this increased power for one particular class of laser beams--wide, flat-topped, mesa beams. In particular we model a single mesa beam Fabry-Perot cavity having thermoelastically deformed mirrors. We calculate the intensity profile of the fundamental cavity eigenmode in the presence of thermal perturbations, and the associated changes in thermal noise. We also outline an idealized method of correcting for such effects. At each stage we contrast our results with those of a comparable Gaussian beam cavity. Although we focus on mesa beams the techniques described are applicable to any azimuthally symmetric system.

Full work available at URL: https://arxiv.org/abs/1704.03600

Mathematics Subject Classification ID

Observational and experimental questions in relativity and gravitational theory (83B05) Gravitational waves (83C35)