Talk by Pierre Lemonde, L'Observatoire astronomique de Paris-Meudon-Nancay – Niels Bohr Institute - University of Copenhagen

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Niels Bohr Institute > Calendar > 2010 > Talk by Pierre Lemonde...

Talk by Pierre Lemonde, L'Observatoire astronomique de Paris-Meudon-Nancay

Research on optical frequency metrology at LNE-SYRTE presently follow three different directions. First, on optical atomic clocks, I will present recent results on two projects towards high performance optical lattice clocks with Sr and Hg atoms. In particular, I will focus on the optimization of the clocks frequency stability and associated experimental developments- non-destructive detection scheme and ultra-stable laser. Second, on long distance clock comparison, I will describe a high performance coherent optical fiber link and preliminary results towards a free-space coherent optical link. Finally, I will show recent results on the generation of microwave signals with stability close to 10^{-16} at 1s averaging time by downconversion of an optical source using a fiber femto-second frequency comb.