Magic Wavelength Measurement of the ^(87)Sr Optical Lattice Clock at NIM  

作　　者：王强 林弋戈 孟飞 李烨 林百科 臧二军 李天初 方占军 

机构地区：[1]National Institute of Metrology [2]Department of Precision Instrument,Tsinghua University [3]School of Electronics Engineering and Computer Science,Peking University

出　　处：《Chinese Physics Letters》2016年第10期45-48,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 91336212

摘　　要：We report on the magic wavelength measurement of our optical lattice clock based on fermion strontium atoms at the National Institute of Metrology （NIM）. A Ti：sapphire solid state laser locked to a reference cavity inside a temperature-stabilized vacuum chamber is employed to generate the optical lattice. The laser frequency is measured by an erbium fiber frequency comb. The trap depth is modulated by varying the lattice laser power via an acousto-optic modulator. We obtain the frequency shift coefficient at this lattice wavelength by measuring the diffbrential frequency shift of the clock transition of the strontium atoms at different trap depths, and the frequency shift coefficient at this lattice wavelength is obtained. We measure the frequency shift coefficients at different lattice frequencies around the magic wavelength and linearly fit the measurement data, and the magic wavelength is calculated to be 368554672（44）MHz.We report on the magic wavelength measurement of our optical lattice clock based on fermion strontium atoms at the National Institute of Metrology （NIM）. A Ti：sapphire solid state laser locked to a reference cavity inside a temperature-stabilized vacuum chamber is employed to generate the optical lattice. The laser frequency is measured by an erbium fiber frequency comb. The trap depth is modulated by varying the lattice laser power via an acousto-optic modulator. We obtain the frequency shift coefficient at this lattice wavelength by measuring the diffbrential frequency shift of the clock transition of the strontium atoms at different trap depths, and the frequency shift coefficient at this lattice wavelength is obtained. We measure the frequency shift coefficients at different lattice frequencies around the magic wavelength and linearly fit the measurement data, and the magic wavelength is calculated to be 368554672（44）MHz.

关 键 词：of is as on by BE Magic Wavelength Measurement of the Sr Optical Lattice Clock at NIM 

分 类 号：TM935.115[电气工程—电力电子与电力传动]