论文部分内容阅读
相干光检测可以提高光通信系统的接收灵敏度,改善系统的性能;但大气的退偏效应使光信号通过大气传输后偏振状态随机变化,难以实现两束光偏振态一致的要求,直接影响该系统的检测效率。文中讨论了相干光通信系统偏振控制的新方法,在此基础上建立了偏振控制数学模型。选择挤压光纤偏振控制器作为该方案的偏振控制器件,选择模拟退火算法为该系统控制算法,并利用改进后的模拟退火算法实现偏振态的自动控制,整个控制过程采用盲搜索,没有具体参量的变化。仿真结果表明:该方法适合相干光通信,达到了偏振控制的目的。
Coherent light detection can improve the receiving sensitivity of the optical communication system and improve the performance of the system. However, the depolarization effect in the atmosphere causes the polarization state of the optical signal to change randomly after passing through the atmosphere, which makes it difficult to achieve the uniform polarization state of the two beams and directly affects the system The detection efficiency. In this paper, a new method of polarization control of coherent optical communication system is discussed. Based on this, a mathematical model of polarization control is established. Select the extrusion fiber polarization controller as the polarization control device of the program, select the simulated annealing algorithm for the system control algorithm, and the use of improved simulated annealing algorithm to achieve the polarization state of automatic control, the entire control process using blind search, no specific parameters The change. Simulation results show that this method is suitable for coherent optical communication and achieves the purpose of polarization control.