详细介绍了两套频差为9.2 GHz且相位锁定的Raman激光系统的产生方法、判定方法、优缺点及其在铯原子基态相干操控中的应用。通过饱和吸收谱和法布里珀罗腔的透射信号初步判断两束相位相干光频率差，通过拍频实验进一步证实了两束相干光的频率的相对稳定度。利用自由光谱区约为18.4 GHz的控温标准具把激光器锁定在相对于铯原子D2跃迁线负失谐约为10 GHz的频率上，实现了相位相干光的大频差锁定。实验上实现了单个铯原子在磁光阱(MOT)和偶极力阱(FORT)中基态超精细态的制备和检测。利用上述系统完成单个铯原子基态的任意相干叠加态的制备，从而实现量子比特。

Two laser systems that can be used in coherent manipulation of the ground states of cesium (Cs) atoms with the frequency difference of 9.2 GHz are studied. The advantages and disadvantages of two laser systems are analyzed. The frequency difference of the two lasers is approved by saturated absorption spectroscopy or Fabry-Perot cavity, and the relative frequency stabilization of coherent laser beams is also analyzed by the beat-note signal. Using the temperature controlled etalon with free spectral range of 18.4 GHz, the laser can be locked to about 10 GHz negative detuning from the D2 transmission line of cesium atoms, which realizes a large frequency difference lock of phase coherent light. The single cesium atom trapped in the magneto-optcial trap (MOT) and the far-off-resonance optcial dipole trap (FORT) is already prepared and dectected in the hyperfine states experimentally. Raman laser system can be applied to the single atom to realize the coherent manipulation of the ground state of single cesium atom.