The corresponding area theorem is derived, which is a generalization of the area theorem related initially to the lightpulsepropagation through the two-level system.
导出了相应的“面积定理”，是将只关系到光脉冲在二能级系统中传播的面积定理的一种推广。
2
The coherently coupled nonlinear Schrdinger (NLS) equation of the propagation of a lightpulse in a fiber has been studied.