| Zugriffsnummer | 54585 |
| Dokumenttyp | Konferenzartikel in Zeitschrift |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Towards a sub-kelvin cryogenic Fabry-Perot silicon cavity |
| Autor(in); Institution |
Barbarat, Joannés; Université de Franche-Comté, CNRS, Besançon, FRANCE
Gillot, Jonathan; ENSMM, CNRS, FEMTO-ST, Besançon, FRANCE
Millo, Jacques; ENSMM, CNRS, FEMTO-ST, Besançon, FRANCE
Lacroûte, Clément; Université de Franche-Comté, CNRS, FEMTO-ST, Besançon, FRANCE
Giordano, Vincent; Université de Franche-Comté, CNRS, FEMTO-ST, Besançon, FRANCE
Kersalé, Yann; ENSMM, CNRS, FEMTO-ST, Besançon, FRANCE
|
| Quelle/Jahr | Journal of Physics: Conference Series: 2889 (2024), 1, 1 - 9 |
| Artikelnummer | 012056 |
| ISSN | 1742-6588 (print) ; 1742-6596 (online) |
| DOI | |
| Verlag | Bristol: IOP Publishing |
| Konferenzangaben | 9th Symposium on Frequency Standards and Metrology, Kingscliff, 16-20, October, 2023, Australia |
| Zusammenfassung | We report on the development of a sub-kelvin, single-crystal silicon Fabry-Perot cavity. Operating such a cavity below 1 K should reduce the thermal noise limit of the cavity, and by this way address the current limitations of ultrastable lasers. To further decrease mechanical losses, mirrors with silicon substrates and crystalline coatings are optically contacted to the spacer, resulting in a room-temperature finesse of 220,000. To operate our cavity at sub-kelvin temperatures, we use a dilution refrigerator able to reach temperatures down to 10 mK. We have designed a mechanical mount to house our cavity in such a cryostat, with optimized heat transfer that will decrease the cooldown time for temperatures below 1 K. The estimated thermal noise is projected to be ∼ 7×10−19 at 100 mK. However, silicon cavities with crystalline mirror coatings at cryogenic temperatures have shown birefringence correlated frequency fluctuations as well as unknown additional noise mechanisms [1, 2]. We have measured a room-temperature TEM00 birefringent mode splitting of about 250 kHz. Understanding and measuring these noise mechanisms will be a key to attaining fractional frequency stabilities beyond state-of-the-art. |
| Kostenfreier Zugang | Open Access Gold |
| Rechteinformation | CC BY 4.0 ; Creative Commons Attribution 4.0 License |
| Forschungsprojekt | This work has been supported by the EIPHI Graduate School (contract “ANR-17-EURE-0002”), by the ANR-10-LABX-48-01 First-TF and ANR-11-EQPX-0033 Oscillator-IMP, and by the Région Bourgogne Franche-Comté. This project (20FUN08 NEXTLASERS) has received funding from the EMPIR programme co-financed by the Participating States and from the European Union’s Horizon 2020 research and innovation programme. |
| Förderinformationen (1) |
Förderername: EURAMET
Förderprogramm: EMPIR 2020 Fundamental Titel der Förderung: 20FUN08: NEXTLASERS: Next generation ultrastable lasers: reducing thermal noise limit and overcoming technical limitations with new materials and technologies URI der Förderung: https://www.ptb.de/empir2021/nextlasers/home/ |