Hannover 2020 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 39: Posters: Quantum Optics and Photonics III

Q 39.1: Poster

Wednesday, March 11, 2020, 16:30–18:30, Empore Lichthof

A Distribution Board for an Ultra-stable Transportable Clock Laser — •Eileen Annika Klocke¹, Sofia Herbers^1,2, Lenard Pelzer¹, Uwe Sterr¹, Piet Oliver Schmidt^{1, 2, 3}, and Chrstian Lisdat¹ — ¹Physikalisch-Technische Bundesanstalt, Braunschweig, Germany — ²DLR-Institute for Satellite Geodesy and Inertial Sensing, c/o Leibniz Universität Hannover, Hannover, Germany — ³Institut of Quantum Optics, Leibniz Universität Hannover, Hannover, Germany

Ultra-stable interrogation lasers are key components in optical clocks. These clocks are used to investigate tests of fundamental physics or determine height differences between distant points in relativistic geodesy. Many applications require a transportable system that cannot rely on a well-controlled laboratory environment.

Here we present an interrogation laser system, composed of a laser, a cavity to frequency stabilize the laser, and a light distribution board. This system is designed for a transportable optical Al⁺ quantum logic clock. The thermal noise of the cavity components is expected to limit the fractional frequency stability of the laser to values below 10⁻¹⁶.

For clock operation, the laser light is split up on the distribution board, and sent via path length stabilized optical fibers to the atomic reference, the cavity and the frequency comb. The compact and robust distribution board ensures the transportability as well as a stable and accurate frequency transfer.