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利用“反直觉”频率啁啾激光脉冲分析了偶能级ladder系统的布局数迁移,其中在缀饰激光场作用下N-2个中间态进行耦合.作为偶能级ladder系统的代表,我们着重分析了四能级ladder系统.研究发现如果缀饰激光场足够强且发生共振,则在能级1和能级4之间发生完全布局数迁移必须要求有一个恰当的脉冲叠加面积.调谐pump激光和stokes激光,使其中一个缀饰中间态发生共振,则可以使这个四能级系统简化为三能级系统.
The displacement of the even-level ladder system was analyzed by using the “anti-intuition” frequency chirped laser pulse, in which N-2 intermediate states were coupled under the embossed laser field. As a representative of the even-level ladder system, We focused on the analysis of a four-level ladder system and found that if the embossed laser field is strong enough and resonates, then a complete placement number migration between level 1 and level 4 must require an appropriate pulse overlap area pump and stokes lasers, resonating one of the embossed intermediate states, the four-level system can be reduced to a three-level system.