Input optics systems of the KAGRA detector during O3GK
(2023) Progress of Theoretical Physics — Vol. 2023 (2023)
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- Abstract
- KAGRA, the underground and cryogenic gravitational-wave detector, was operated for its solo observation from February 25 to March 10, 2020, and its first joint observation with the GEO 600 detector from April 7 to April 21, 2020 (O3GK). This study presents an overview of the input optics systems of the KAGRA detector, which consist of various optical systems, such as a laser source, its intensity and frequency stabilization systems, modulators, a Faraday isolator, mode-matching telescopes, and a high-power beam dump. These optics were successfully delivered to the KAGRA interferometer and operated stably during the observations. The laser frequency noise was observed to limit the detector sensitivity above a few kilohertz, whereas the laser intensity did not significantly limit the detector sensitivity.
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., J. S., KAGRA, & et al. (2023). Input optics systems of the KAGRA detector during O3GK. Progress of Theoretical Physics, 2023. https://doi.org/10.1093/ptep/ptac166 (Original work published 2023)