31 December 2013 High precision 6.8GHz phase locking of coherent laser beams for optical lattice experiment
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Abstract
With the optical phase lock loop (OPLL) we made, we can achieve phase locking at frequency differences ranging from 0.5GHz to 7.5 GHz. This OPLL is fully applicable in atomic physics experiments, mostly in coherent lasers frequency locking. Two kinds of modulation modes were brought to ensure the frequency range and precision: the fast feedback current as the injection current and the slow feedback current to adjust the piezo-electric transducer. This device has been put into an optical lattice platform to lock a laser used for cooling and trapping atoms. The beat signal has a -3dB band width of 1Hz at 6.834GHz, corresponding to the hyperfine splitting of the ground state 87Rb atom.
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Xun Ding, Xun Ding, Linlin Sang, Linlin Sang, Chen Zhang, Chen Zhang, Ge Jin, Ge Jin, Xiao Jiang, Xiao Jiang, } "High precision 6.8GHz phase locking of coherent laser beams for optical lattice experiment", Proc. SPIE 9042, 2013 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 90421C (31 December 2013); doi: 10.1117/12.2037782; https://doi.org/10.1117/12.2037782
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