考虑相干驱动场的线宽，探讨了其对双激发态原子三能级系统中的电磁感应透明现象的影响，得到结论：相干驱动场的线宽抑制了介质对弱探测光的透明 Considering the linewidth of the coherent driving field, the influence of electromagnetic field on the three-level system of the double-excited atom is discussed. It is concluded that the line width of the coherent driving field suppresses the transparency of the medium to the weak detecting light