Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 62: Poster: Quantum Optics and Photonics V
Q 62.45: Poster
Donnerstag, 8. März 2018, 16:15–18:15, Redoutensaal
Operating a high-accuracy lattice optical clock with a filtered tapered amplifier lattice laser — •Pramod Mysore Srinivas1, Stefano Origlia1, Stephen Schiller1, Christian Lisdat2, Uwe Sterr2, Jürgen Stuhler3, Stefan Baumgärtner3, and Rudolf Neuhaus3 — 1Institut für experimentalphysik, Heinrich Heine Universität, 40225, Düsseldorf, Germany — 2Physikalisch Technische Bundesanstalt, Bundesallee 100, Braunschweig, Germany — 3Toptica Photonics AG, Lochhamer Schlag 19, 82166,Gräfelfing, Germany
In an optical lattice clock atoms are trapped and interrogated in a periodic potential generated using a strong light field (optical lattice). A shift of the clock transition frequency can be strongly suppressed by operating the lattice laser at the *magic* frequency. A high spectral purity of the lattice beam is also of critical importance for minimizing residual shifts. In tapered amplifier (TA) diode lasers the contribution of amplified spontaneous emission (ASE) is a major limiting factor for achieving clock uncertainty below 1x10-16. In this work we present the characterization of a new grating-based filter to suppress the ASE of a commercial 813 nm laser in a transportable Sr clock [1]. Its magic wavelength is compared with the one of a Ti:Sapphire laser. The optical clock frequency uncertainty due to the lattice laser is evaluated. [1] Origila et al. Proc. of SPIE 9900, 990003-1 (2016)