First Evaluation and Frequency Measurement of the Strontium Optical Lattice Clock at NIM

【摘要】 An optical lattice clock based on ⁸⁷Sr is built at National Institute of Metrology（NIM） of China.The systematic frequency shifts of the clock are evaluated with a total uncertainty of 2.3×10^-16.To measure its absolute frequency with respect to NIM’s cesium fountain clock NIM5,the frequency of a Hywheel H-maser of NIM5 is transferred to the Sr laboratory through a 50-km-long fiber.A fiber optical frequency comb,phase-locked to the reference frequency of this H-maser,is used for the optical frequency measurement.The absolute frequency of this Sr clock is measured to be 429228004229873.7（1.4）Hz.更多还原

【Abstract】 An optical lattice clock based on ⁸⁷Sr is built at National Institute of Metrology（NIM） of China.The systematic frequency shifts of the clock are evaluated with a total uncertainty of 2.3×10^-16.To measure its absolute frequency with respect to NIM’s cesium fountain clock NIM5,the frequency of a Hywheel H-maser of NIM5 is transferred to the Sr laboratory through a 50-km-long fiber.A fiber optical frequency comb,phase-locked to the reference frequency of this H-maser,is used for the optical frequency measurement.The absolute frequency of this Sr clock is measured to be 429228004229873.7（1.4）Hz.更多还原