| Zugriffsnummer | 28071 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | Thermal noise in optical cavities revisited |
| Autor(in); Institution |
Kessler, Thomas; 4.3, Quantenoptik und Längeneinheit, PTB-Braunschweig
Legero, Thomas; 4.3, Quantenoptik und Längeneinheit, PTB-Braunschweig
Sterr, Uwe; 4.3, Quantenoptik und Längeneinheit, PTB-Braunschweig
|
| Quelle/Jahr | Journal of the Optical Society of America B: 29 (2012), 1, 178 - 184 |
| ISSN | 0740-3224 (PRINT) ; 1520-8540 (ONLINE) |
| DOI | |
| URL | |
| Verlag | Washington, DC: OSA |
| Zusammenfassung | Thermal noise of optical reference cavities sets a fundamental limit to the frequencyinstability of ultra-stable lasers. Using Levin’s formulation of the fluctuation-dissipationtheorem we correct the analytical estimate for the spacer contribution given by Numata et al. [1]. For detailed analysis finite-element calculations of the thermal noise focusing on the spacer geometry, support structure and the usage of different materials have been carried out. We find that the increased dissipation close to the contact area between spacer and mirrors can contribute significantly to the thermal noise. From an estimate of the support structure contribution we give guidelines for a low-noise mounting of the cavity. For mixed-material cavities we show that the thermal expansion can be compensated without deteriorating of thermal noise. [1] K. Numata, A. Kemery, and J. Camp, "Thermal-noise limit in the frequency stabilization of lasers with rigid cavities," Phys. Rev. Lett. 93, 250602–1-4 (2004). |
