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Q: Fachverband Quantenoptik und Photonik

Q 50: Poster Ultrakalte Atome

Q 50.4: Poster

Thursday, March 13, 2008, 16:30–19:00, Poster C2

Clock laser for an optical lattice clock with strontium — •Thomas Legero, Fritz Riehle, and Uwe Sterr — Physikalisch-Technische Bundesanstalt, Braunschweig, Germany

Ultrastable lasers with high spectral purity are a key technology in optical frequency metrology. We report on a 698 nm master-slave diode laser setup to probe the 1S0 - 3P0 clock transition of strontium atoms confined in a 1D optical lattice. The master laser is an extended cavity diode laser in Littman configuration which is locked to a high finesse optical cavity by the Pound-Drever-Hall stabilization technique. The temperature-stabilized and vibration-insensitive cavity is made of a 100 mm long ULE spacer and shows a Finesse of 330 000. For probing the clock transition, the light from the injection locked slave laser is sent to the strontium atoms and to a femtosecond fiber-laser comb by two actively noise-cancelled optical fibers. We present the setup and the characteristics of the master-slave system and the performance of the fiber noise cancellation.