An Optical Lattice Clock with Spin-polarized 87Sr Atoms

Abstract

We present a new evaluation of an 87Sr optical lattice clock using spin polarized atoms. The frequency of the 1S0-3P0 clock transition is found to be 429 228 004 229 873.6 Hz with a fractional accuracy of 2.6 10^{-15}, a value that is comparable to the frequency difference between the various primary standards throughout the world. This measurement is in excellent agreement with a previous one of similar accuracy.

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• Observation and cancellation of the dc Stark shift in strontium optical lattice clocks
• Long term measurement of the ${}^{87}$Sr clock frequency at the limit of primary Cs clocks
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• Atomic fountains and optical clocks at SYRTE: status and perspectives
• Stability Transfer between Two Clock Lasers Operating at Different Wavelengths for Absolute Frequency Measurement of Clock Transition in 87Sr
• Spectroscopy and frequency measurement of the ${}^{87}$Sr clock transition by laser linewidth transfer using an optical frequency comb
• Characterizing a fiber-based frequency comb with electro-optic modulator
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• Advanced noise reduction techniques for ultra-low phase noise optical-to-microwave division with femtosecond fiber combs
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• Interrogation laser for a strontium lattice clock
• Magic radio-frequency dressing of nuclear spins in high-accuracy optical clocks