Open AccessRealistic loss estimation due to the mirror surfaces in a 10 meters-long high finesse Fabry-Perot filter-cavity
Author(s) -
N. Straniero,
J. Degallaix,
R. Flaminio,
L. Pinard,
G. Cagnoli
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.021455
Subject(s) - finesse , optics , fabry–pérot interferometer , flatness (cosmology) , optical cavity , physics , laser , materials science , cosmology , quantum mechanics
In order to benefit over the entire frequency range from the injection of squeezed vacuum light at the output of laser gravitational wave detectors, a small bandwidth high finesse cavity is required. In this paper, we investigate the light losses due to the flatness and the roughness of realistic mirrors in a 10 meters-long Fabry-Perot filter cavity. Using measurements of commercial super-polished mirrors, we were able to estimate the cavity round trip losses separating the loss contribution from low and high spatial frequencies. By careful tuning of the cavity g-factor and the incident position of the light on the mirrors, round trip losses due to imperfect mirror surfaces as low as 3 ppm can be achieved in the simulations.