这是用四阶龙格库塔法计算半导体激光器速率方程的工程，源代码用C语言书写，开发平台为VC6.0。程序输出数据被写入文件SLdata.txt中，其中第一列为仿真时间，第二列为载流子浓度，第三列为光子密度。为了方便更多相关开发者调试，还提供了一个matlab源文件test.m。test.m用于将计算数据在matlab中用曲线显示。-This is project developed by Visual C++ 6.0 software platform, which uses the 4th order Runge Kutta method to solve the rate equations in semiconductor lasers. The computational results is placed in the file named by　SLdata.txt , in which the first colomn stand for the simulation time, the second represents the carrier density at corresponding time, and the third colomn is the photon density. For convinence, another matlab source code file is also presented, which can be used to display the simulation data by some plots within Matlab environment.