High precision 6.8GHz phase locking of coherent laser beams for optical lattice experiment

Xun Ding; Linlin Sang; Chen Zhang; Ge Jin; Xiao Jiang

doi:10.1117/12.2037782

31 December 2013 High precision 6.8GHz phase locking of coherent laser beams for optical lattice experiment

Xun Ding, Linlin Sang, Chen Zhang, Ge Jin, Xiao Jiang

Proceedings Volume 9042, 2013 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments; 90421C (2013) https://doi.org/10.1117/12.2037782
Event: International Conference on Optical Instruments and Technology (OIT2013), 2013, Beijing, China

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.

Citation Download Citation

Xun Ding, Linlin Sang, Chen Zhang, Ge Jin, and 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); https://doi.org/10.1117/12.2037782

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