Testing novel high-reflectivity mirror technologies from room-temperature to 4 K

authored by

M. Kempkes, T. Legero, U. Sterr, D. Nicolodi

Abstract

We present a setup based on a low-vibration closed-cycle cryostat for the characterization of mirror coatings and for the direct measurement of Brownian thermal noise from room-temperature to 4 K. Using a dual frequency modulation scheme allows us to lock a laser to two eigenmodes of a high-finesse optical resonator simultaneously and to track the line splitting between the two modes. This facility will enable to investigate the temperature and power dependence of the birefringent line splitting and noise in AlGaAs/GaAs multilayer coatings across a broad temperature range.

External Organisation(s)

Physikalisch-Technische Bundesanstalt PTB

Type

Conference article

Journal

Journal of Physics: Conference Series

Volume

2889

ISSN

1742-6588

Publication date

2024

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

General Physics and Astronomy

Electronic version(s)

https://doi.org/10.1088/1742-6596/2889/1/012054 (Access: Open)