中文摘要：

在大气激光通信中,半导体激光器是最为常见的光源器件,它的特性指标对整个系统的性能影响较大。首先对激光器的非线性进行建模,然后详细讨论了半导体激光器的线性化方法和映射函数的建立过程,最后根据激光器的现有工作状态进行实际测量,得到实际的激光器的I-V特性曲线。基于Volterra级数理论建立半导体激光器的非线性模型并进行曲线拟合得到三次多项式系数,设计预失真补偿法方法对激光器的非线性效应进行校正,并通过实验验证了该方法的有效性。

英文摘要：

In the laser communication, semiconductor laser is the most common light source device, which has a great influence on the performance of the whole system. The nonlinear model of the laser was modeled, then the linear method and the mapping function of the semiconductor laser were discussed. Finally, the I-V characteristic curve of the laser was obtained according to the actual working conduction. Based on the Volterra series theory, the nonlinear model of the cemiconductor laser was established and the three polynomial coefficients were obtained. The method of predistortion compensation was designed to correct the nonlinear effect of laser, and the validity of the method was verified by experiments.