Berlin 2014 – scientific programme

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MS: Fachverband Massenspektrometrie

MS 2: Precision Mass Spectrometry 1/ RIMS

MS 2.5: Talk

Monday, March 17, 2014, 15:15–15:30, DO24 1.205

Difference-frequency generation with pulsed Titanium:sapphire lasers and sodium spectroscopy — •Julia Marín Sáez, Pascal Naubereit, Amin Hakimi, Tobias Kron, Fabian Schneider, and Klaus Wendt — Institut für Physik, Universität Mainz

Tunable laser emission with wavelengths in the green to yellow spectral range of 550 to 600 nm is easily achieved with conventional dye lasers, while it is a challenge for state-of-the-art solid-state Titanium:sapphire lasers emitting in the range of 680 to 1000 nm. In the workgroup Larissa at Mainz University narrow bandwidth, high-repetition rate pulsed Ti:sapphire lasers are developed and used for atomic spectroscopy, ultra trace analysis and application at on-line radioisotope production plants like ISOLDE/CERN. For enhancing the universality of these laser systems the expansion to this wavelength range is aimed for. Therefor frequency mixing of the radiation from a Ti:sapphire laser, operating in the fundamental infrared range, and from a frequency doubled Ti:sapphire in the blue range was carried out by means of difference-frequency generation in a non-linear crystal, obtaining the green-yellow-orange visible spectral range. To demonstrate its performance two- and three-step resonant ionization was tested on atomic sodium. The excitation schemes have the well-known 589 nm sodium doublet as first transition. Step-wise resonance ionization up to excitation of Rydberg states with even and/or odd parity are studied and presented.