Free-space optical time-frequency transfer over 2 km
William C. Swann, Fabrizio R. Giorgetta, Laura C. Sinclair, Esther Baumann, Ian R. Coddington, Nathan R. Newbury
Precision free-space time-frequency transfer could advance fields where present microwave-based transfer is inadequate. We demonstrate an optical free-space link with femtosecond timing deviation and residual instability below 10−18 at 1000 seconds.
CLEO 2013, the Conference on Lasers and Electro-Optics