【摘要】 利用亚稳态氪原子2^P_3/25p[5/2]₃-²P_3/25s[3/2]₂饱和吸收光谱,分别使用电光调制器相位调制和声光调制器移频调制的方法,结合相敏检测,实现了钛宝石激光器相对于亚稳态氪原子的811.5 nm饱和吸收线的频率锁定。由获得的鉴频曲线以及误差信号估算,激光频率漂移从稳频回路开路时的超过8 MHz,减小到回路闭合时的约1 MHz,并可实现对激光频率数小时的稳定。该稳频后的激光光源被成功地用于激光冷却亚稳态氪原子各个稳定同位素。更多还原

【Abstract】 The saturation spectroscopy of the 811 nm ²p_3/2 5p[5/2]₃-²P_3/2 5s[3/2]₂ line of metastable krypton atom was used to lock the frequency of a Ti:Sapphire laser.Two kinds of frequency modulation method were utilized,one using an electro-optic phase modulator,the other using an acoustic-optic frequency shifter. When the feed-back loop was closed the frequency drift was reduced to 1 MHz,while it was about 8 MHz when the loop was open.The laser can be frequency stabilized during hours-long measurements and it allows us to realize laser cooling and trapping of the different isotopes of krypton.更多还原