A transportable optical lattice clock

8th Symposium on Frequency Standards and Metrology 2015

Vogt, Stefan^1 ; Häfner, Sebastian^1 ; Grotti, Jacopo^1 ; Koller, Silvio^1 ; Al-Masoudi, Ali^1 ; Sterr, Uwe^1 ; Lisdat, Christian^1

Physikalisch-Technische Bundesanstalt, Bundesallee 100, Braunschweig

D-38116, Germany^1

关键词: Blackbody radiation shift;    Compact lasers;    High-finesse cavity;    Light shift;    Optical lattice clocks;    Transportable system;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/723/1/012020/pdf
DOI  :  10.1088/1742-6596/723/1/012020

来源: IOP

【 摘 要 】

We present the experimental setup and first results of PTB's transportable87Sr clock. It consists of a physics package, several compact laser breadboards, and a transportable high finesse cavity for the clock laser. A comparison of the transportable system with our stationary optical lattice clock yields an instability of 2.2 x 10-15√s/τ for the transportable clock. The current fractional uncertainty of 1 × 10-15is still limited by the not yet fully evaluated light shift from the free running optical lattice laser operated near the magic wavelength. We are currently improving our transportable system to reach an uncertainty at or below the 10-17level, which will finaly be limited by the uncertainty in blackbody radiation shift correction.