Feasibility study of beam-expanding telescopes in the interferometer arms for the Einstein Telescope

Samuel Rowlinson, Artemiy Dmitriev, Aaron W. Jones, Teng Zhang, Andreas Freise

Research output: Contribution to journalArticle

Abstract

The optical design of the Einstein Telescope (ET) is based on a dual-recycled Michelson interferometer with Fabry-Perot cavities in the arms. ET will be constructed in a new infrastructure, allowing us to consider different technical implementations beyond the constraints of the current facilities. In this paper we investigate the feasibility of using beam-expander telescopes in the interferometer arms. We provide an example implementation that matches the optical layout as presented in the ET design update 2020. We further show that the beam-expander telescopes can be tuned to compensate for mode mismatches between the arm cavities and the rest of the interferometer.

Original languageEnglish
Article number023004
JournalPhysical Review D
Volume103
Issue number2
DOIs
Publication statusPublished - 5 Jan 2021

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