First Measurements of Spectral Hole Line Shifts at Dilution Temperatures for Laser Stabilization
Résumé
Here we report on the status of the Spectral-Hole Burning (SHB) laser-stabilization experiment at LNE-SYRTE, focusing on our first measurements of thermally induced frequency shifts of spectral holes at dilution temperatures (T0 < 1 K). The effect, which is predicated to scale as T 4 , produces shifts of order 1-10 Hz over its ≈ 517 THz center at these temperatures. To meet this challenge, we introduced a novel temperaturemodulation based approach to spectral-hole line shift measurements, allowing integration time of the small signals. We find a preliminary value for the line-shift constant of Eu 3+ :Y2SiO5, α = 107 Hz K-4 , a first at dilution temperatures.
Origine : Fichiers produits par l'(les) auteur(s)
Licence : CC BY - Paternité
Licence : CC BY - Paternité