恶劣环境下的光纤通信技术研究

摘要

利用相干检测技术和脉冲调制技术,探讨恶劣环境下的光纤调制方法.当激光光源稳定传输时,选择相干检测技术调节系统光电电流,利用低通滤波和光谱密度调制方法排除环境干扰.当激光光源传输不稳定并已进行信号同步采样时,使用脉冲调制方法排除环境干扰.仿真测试结果表明,该方法能够有效地稳定环境噪声,使激光光强逐渐饱和,最大化发挥光纤的优势.%The method of coherent modulation and pulse modulation is used to study the modulation of optical fiber in bad environment.When laser light source is stable,coherent detection technique is used to adjust the current of system,low pass filtering and spectral density modulation are used to eliminate environmental interference.When laser source is not stable and signal has been sampled synchronously,pulse modulation method is used to eliminate interference.The simulation results show that the proposed method can effectively stabilize ambient noise,make laser intensity gradually saturated,and maximize advantages of optical fiber.