Options
Institut de physique
Organisation mère
Site web
Courriel
Téléphone
+41 (0)32 718 29 11
Fax
+41 (0)32 718 29 01
Rue
Avenue de Bellevaux 51
Code postal
2000
Ville
Neuchâtel
Pays
CH
Type d'institution
Academic Institute
Identifiants
771 Résultats
Voici les éléments 1 - 10 sur 771
- PublicationMétadonnées seulementSESAMs for high-power femtosecond modelocking: power scaling of an Yb: LuScO< sub> 3 thin disk laser to 23 W and 235 fs(2011)
; - PublicationMétadonnées seulement
- PublicationMétadonnées seulementEfficient 2nd and 4th harmonic generation of a single-frequency, continuous-wave fiber amplifier(2008)
; - PublicationMétadonnées seulementAntennal electrophysiological responses of three parasitic wasps to caterpillar-induced volatiles from maize (Zea mays mays), cotton (Gossypium herbaceum), and cowpea (Vigna unguiculata)(2005)
; - PublicationMétadonnées seulement
- PublicationMétadonnées seulementA new method of dark resonance excitation on D2 line in 87Rb vapor(2005-7-3)
- PublicationMétadonnées seulementExperimentally verified pulse formation model for high-power femtosecond VECSELs(2013)
; ; ; Keller, Ursula - PublicationMétadonnées seulementMode?locked high?power lasers and nonlinear optics?a powerful combination(2004)
; - PublicationMétadonnées seulement1,4-Bis(hex-yloxy)-2,5-diiodo-benzene(2010)
; ; - PublicationMétadonnées seulementCONTINUOUS FOUNTAIN CS STANDARD: STABILITY AND ACCURACY ISSUESWe describe a primary fountain frequency standard operating with a continuous beam of laser-cooled Cs atoms. In such a device, aliasing effects, which may degrade the short-term stability in pulsed fountains, are removed and atomic-noise limited stability can be achieved with a state-of-the art, but commercially available, local oscillator. The present experimental short-term stability is measured to be 2.5 · 10-13τ-1/2. Another feature of the continuous fountain is the reduced atomic density and higher beam temperature which reduces the collisional shift of the atomic frequency below the 10-15 level. The light-shift is an undesirable characteristic of the continuous operation. Without a light-trap, a light-shift of the order of 10-12 has been measured. The shift is stable enough not to affect the frequency stability to 104 seconds (2.5 · 10-15). A rotating light-trap has been constructed and tested to bring the light-shift and the corresponding uncertainty to a negligible level. Various contributions to the accuracy are studied.