Accurate calculation of thermal noise in multilayer coating

Details Accurate calculation of thermal noise in multilayer coating Accurate calculation of thermal noise in multilayer coating

2010-05-18

arxiv.org/abs/1005.3138v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

10 pages, 9 figures

Scientific paper

We derive accurate formulas for thermal fluctuations in multilayer interferometric coating taking into account light propagation inside the coating. In particular, we calculate the reflected wave phase as a function of small displacements of the boundaries between the layers using transmission line model for interferometric coating and derive formula for spectral density of reflected phase in accordance with Fluctuation-Dissipation Theorem. We apply the developed approach for calculation of the spectral density of coating Brownian noise.

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