When the delay of the Stark-shifting pulse with respect to the pulse of the coupling-laser Rabi frequency guarantees strong pump intensity of the two resonances while the weak pump intensity.

• 如果选择合适的脉冲延迟时间,可使泵浦脉冲在一个交叉点周围足够强,在另一个交叉点周围足够弱,这样粒子从基态转移到激发态的效率可以达到最大值1。