| Zugriffsnummer | 13059 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | International comparison of two iodine-stabilized frequency-doubled Nd:YAG lasers at λ=532 nm |
| Autor(in); Institution |
Cordiale, P.; IMGC-CNR, Torini, ITALY
Galzerano, G.; INFM-Dipartimento di Elettronica e Informazione-Politecnico, Milano, ITALY; CSTS-CNR, Milano, ITALY
Schnatz, Harald; 4.31, Längeneinheit, PTB-Braunschweig
|
| Quelle/Jahr | Metrologia: 37 (2000), 2, 177 - 182 |
| ISSN | 0026-1394 |
| Verlag | Sèvres: BIPM |
| Freie Schlagworte | frequency standard ; Nd: YAG-Iodine |
| Zusammenfassung | An international comparison of two I2-stabilized frequency-doubled Nd:YAG lasers at λ = 532 nm has been performed between the Istituto di Metrologia "G. Colonnetti" (IMGC)/ Politecnico di Milano (PoliMI) and the Physikalisch-Technische Bundesanstalt (PTB). Both lasers used saturated absorption of the P(54) 32-0 iodine transition as a frequency reference. The signals for stabilizing the lasers were obtained using the frequency modulation spectroscopy technique with an external iodine cell. A minimum value for the relative Allan standard deviation of 7 x 10-14 was reached after an integration time of 40 s. The hyperfine line separations were measured by the beat-frequency method and compared with the frequency values recently reported by Ye and co-workers. Three different iodine cells were investigated. The range of frequency differences for the iodine cells IMGCQU and PTB1/98 between the two lasers was from -9 kHz to 7.3 kHz with a mean of 1.2 kHz and a standard deviation of 3.5 kHz. Taking into account the measured frequency offsets of the different iodine cells, the evaluated frequency repeatability of the optical standards was within 2.5 kHz. |
