导出了一种用系统10%－90%上升时间所表示的最坏情况下多模光纤色散功率代价的计算方法。将最坏情况下的眼图闭合用光接收器在t₀时刻的输出信号波形表示，从而得到了色散功率代价的数学表达式。为了得到光接收器输出信号波形的解析解，假设多模光纤链路是一个低通滤波器，其归一化脉冲响应是高斯形式的。用这种方法对甚短距离光传输系统VSR－1的色散功率代价做了计算分析，所得结果可作为最坏情况下VSR－1链路功率预算分析的参考。

An approach for the calculation of the worst-case dispersion penalty of multimode fiber links was derived. The approach is expressed by 10%-90% rise time of the system. The worst-case eye closure was expressed with the signal waveform from receiver at t₀,thereby the numerical equation of the dispersion penalty was obtained. In order to derive the analysis result of the signal waveform,it was supposed that the multimode fiber system is a low-pass filter;its normalized impulse response is Gaussian form. The dispersion penalty of VSR-1 optical link was calculated by this approach. The result can be used as the reference for the worst-case VSR-1 link budget analysis.