Folding gravitational-wave interferometers

J. R. Sanders, Stefan Ballmer

Research output: Contribution to journalArticle

Abstract

The sensitivity of kilometer-scale terrestrial gravitational wave interferometers is limited by mirror coating thermal noise. Alternative interferometer topologies can mitigate the impact of thermal noise on interferometer noise curves. In this work, we explore the impact of introducing a single folding mirror into the arm cavities of dual-recycled Fabry-Perot interferometers. While simple folding alone does not reduce the mirror coating thermal noise, it makes the folding mirror the critical mirror, opening up a variety of design and upgrade options. Improvements to the folding mirror thermal noise through crystalline coatings or cryogenic cooling can increase interferometer range by as much as a factor of two over the Advanced LIGO reference design.

Original languageEnglish (US)
Article number025003
JournalClassical and Quantum Gravity
Volume34
Issue number2
DOIs
StatePublished - Jan 19 2017

Fingerprint

gravitational waves
folding
interferometers
thermal noise
mirrors
coatings
cryogenic cooling
LIGO (observatory)
Fabry-Perot interferometers
topology
cooling
cavities
sensitivity
curves

Keywords

  • gravitational waves
  • interferometry
  • thermal noise

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Folding gravitational-wave interferometers. / Sanders, J. R.; Ballmer, Stefan.

In: Classical and Quantum Gravity, Vol. 34, No. 2, 025003, 19.01.2017.

Research output: Contribution to journalArticle

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