If the emitter ledge is too thick, current will flow through the undepleted ledge, which increases the emitter-size effect.

不适当射极突出部厚度，将会射极突出部侧壁造成严。

The analytical solutions for the stead state equations of four wave mixing with an arbitrary complex coupling constant are given without the undepleted pump approximation.

无泵浦非耗竭近似下，给出了耦系数为任意值时稳态四波混频耦波方程组解析解。