| Zugriffsnummer | 11754 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | A transportable optical calcium frequency standard : dedicated to J. Helmcke on the occasion of his 60th birthday |
| Autor(in); Institution |
Kersten, Peter; Agfa Gevaert, München, GERMANY
Mensing, Friedhelm; 4.31, Längeneinheit, PTB-Braunschweig
Sterr, Uwe; 4.31, Längeneinheit, PTB-Braunschweig
Riehle, Fritz; 4, Optik, PTB-Braunschweig
|
| Quelle/Jahr | Applied Physics B: 68 (1999), 27 - 38 |
| ISSN | 0946-2171 |
| DOI | |
| Verlag | Berlin [u.a.]: Springer |
| Klassifikationscode | PACS: 06.20.Fn ; PACS: 06.30.Ft ; PACS: 07.60.Yi |
| Zusammenfassung | We report on the development and characterization of a transportable frequency standard to disseminate one of the most precisely known optical frequencies, the frequency of the Ca intercombination line at 657 nm. The key components of the transportable standard are a pre-stabilized diode laser system with a laser linewidth of below 2 kHz and a miniaturized thermal Calcium beam apparatus. A separated-field (optical Ramsey) excitation scheme was used to resolve spectroscopic structures of a width of below 20 kHz which were used to stabilize the laser frequency to the center of the intercombination line. Procedures were developed and applied to reduce effectively the influence of the Doppler effect on the frequency accuracy in the first and second order. The characterization of the stability and reproducibility of the standard was investigated in comparison with a stationary standard based on laser cooled Ca atoms resulting in a relative frequency uncertainty of 1.3 10-12 |
| Rechteinformation | 1999, Springer Verlag |