Rostock 2019 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 3: Precision Spectroscopy of atoms and ions I (joint session A/Q)

A 3.3: Vortrag

Montag, 11. März 2019, 11:00–11:15, S HS 2 Physik

Relative and absolute limitations of wavelength meters for accurate laser stabilization — •Kristian König, Phillip Imgram, Jörg Krämer, Tim Ratajczyk, and Wilfried Nörtershäuser — Institut für Kernphysik, TU Darmstadt

High-precision laser spectroscopy experiments at TU Darmstadt indicated a non-linear behavior of the employed wavelength meters. In a dedicated analysis of these interferometers with a frequency comb, surprising results were obtained. Especially the limited relative accuracy observed even for small frequency changes that are in the range of typical laser scans, was unexpected. We will present the results and discuss its consequences for experiments that base on the relative precision of wavelength meters. Furthermore, we will present a frequency-comb based stabilization scheme of a Ti:Sa laser which offers high short- and long-term stability.