Hannover 2013 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 58: Precision measurements and metrology V
Q 58.6: Talk
Friday, March 22, 2013, 12:15–12:30, E 001
Optical Frequency Transfer over 1840 km Fiber Link - Bridging Continental Distances — •Stefan Droste1, Katharina Predehl1, Thomas Udem1, Theodor W. Hänsch1, Ronald Holzwarth1, Sebastian Raupach2, Filip Ozimek2, Harald Schnatz2, and Gesine Grosche2 — 1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching — 2Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig
The increasing performance of optical frequency standards calls for new methods of transferring highly stable optical frequencies. Well established satellite-based frequency dissemination techniques do not reach the required stability set by state-of-the-art frequency standards. Recently, a lot of work has been put into investigating fiber links as a possible medium for transferring optical frequencies. We established a fiber connection between the two institutes Max Planck Institute of Quantum Optics (MPQ) in Garching and the Physikalisch-Technische Bundesanstalt (PTB) in Braunschweig. In a loop configuration we transferred an optical carrier frequency at 194 THz over a 1840 km long fiber link. Doppler shifts introduced by the fiber link lead to a degradation of the optical signal. After applying a correction signal to compensate for the fiber noise we could demonstrate that optical frequencies can be transferred over nearly 2000 km with a stability and accuracy that surpasses the requirements for comparing modern optical frequency standards by more than one order of magnitude.