Thermally induced refractive index fluctuations in transmissive optical components and their influence on the sensitivity of Einstein telescope

authored by: Jan Meyer, Walter Dickmann, Stefanie Kroker, Mika Gaedtke, Johannes Dickmann
Abstract: With a relative length measurement precision of better than 10-23, gravitational wave interferometers are the most precise instruments that have ever been built. With this enormous sensitivity many noise sources potentially effect gravitational wave detector sensitivity, each of which must be investigated to ensure confidence in design sensitivity. We present calculations of photoelastic noise as well as thermo refractive noise in the beam splitter and the input test masses in Einstein telescope (ET). It turns out that the amplitude of the photoelastic noise in the ET low-frequency detector is about five orders of magnitude below the maximum design sensitivity and five orders of magnitude below that of the ET high-frequency detector, whereas thermo refractive noise impairs the design sensitivity by approximately 20%.
External Organisation(s): Technische Universität Braunschweig
Laboratory for Emerging Nanometrology Braunschweig (LENA)
National Metrology Institute of Germany (PTB)
Type: Article
Journal: Classical and quantum gravity
Volume: 39
ISSN: 0264-9381
Publication date: 07.07.2022
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Physics and Astronomy (miscellaneous)
Electronic version(s): https://doi.org/10.1088/1361-6382/ac6e21 (Access: Closed)

BibTeX

@article{28216700c1754286865bcc3be95253ee,
title = "Thermally induced refractive index fluctuations in transmissive optical components and their influence on the sensitivity of Einstein telescope",
abstract = "With a relative length measurement precision of better than 10-23, gravitational wave interferometers are the most precise instruments that have ever been built. With this enormous sensitivity many noise sources potentially effect gravitational wave detector sensitivity, each of which must be investigated to ensure confidence in design sensitivity. We present calculations of photoelastic noise as well as thermo refractive noise in the beam splitter and the input test masses in Einstein telescope (ET). It turns out that the amplitude of the photoelastic noise in the ET low-frequency detector is about five orders of magnitude below the maximum design sensitivity and five orders of magnitude below that of the ET high-frequency detector, whereas thermo refractive noise impairs the design sensitivity by approximately 20%.",
keywords = "photoelasticity, gravitational wave detection, thermal noise, Einstein telescope",
author = "Jan Meyer and Walter Dickmann and Stefanie Kroker and Mika Gaedtke and Johannes Dickmann",
note = "Funding Information: This work is partially funded by the Project 17FUN05 {\textquoteleft}PhotOQuant{\textquoteright} within the Programme EMPIR. The EMPIR initiative is co-founded by the European Union{\textquoteright}s Horizon 2020 Research and Innovation Program and the EMPIR Participating Countries. The authors also acknowledge support by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germanys Excellence Strategy—EXC-2123 QuantumFrontiers—390837967.",
year = "2022",
month = jul,
day = "7",
doi = "10.1088/1361-6382/ac6e21",
language = "English",
volume = "39",
journal = "Classical and quantum gravity",
issn = "0264-9381",
publisher = "IOP Publishing Ltd.",
number = "13",
}