求矩阵乘的MPI并行程序，与Cannon算法类似，不过传输矩阵信息不通-Demand matrix by the MPI parallel program, and Cannon algorithm is similar, but the transfer matrix information unreasonable

仿真FBG传输特性，共三个函数，利用光纤的传数矩阵和耦合模理论，可在main函数中修改参数-Simulation FBG transmission characteristics of the three functions, the use of optical fiber transmission matrix and coupled-mode theory, the parameters can be modified in the main function