水下激光通信系统接收机倾角及位置对接收光功率的影响研究

Study on the Influence of Receiver Tilt Angle and Position on the Received Optical Power in Underwater Laser Communication Systems

摘要:

采用蒙特卡洛方法建立了水下高斯光束传输仿真模型,基于该模型重点研究了接收机倾角和接收机位置对接收光功率的影响规律。仿真结果表明:在水下信道中,当接收机探测器阵面与激光出射角垂直时,接收光功率最大,随着接收机探测器阵面倾斜角度的增加,接收光功率逐渐减小；当接收机沿着Y轴方向正向移动时,且接收机在激光束的直径范围内时,接收光功率不变；当接收机在激光束的直径范围外时,接收光功率随着接收机偏离原点距离的增加而减小。仿真结果可为水下激光通信工程实践提供参考依据。

Abstract:

A simulation model of underwater Gaussian beam transmission by Monte Carlo method was established, and the influence of receiver tilt angle and receiver position on the attenuation of received optical power based on this model was emphatically studied. The simulation results show that in the underwater channel, the received optical power reaches the maximum when the receiver array is correctly aligned the laser beam, and the received optical power gradually decreases with the increase of the receiver tilt angle. When the receiver moves forward along the Y-axis, the received optical power remains unchanged when the receiver is within the diameter of the laser beam. When the receiver is outside the diameter range of the laser beam, the received optical power decreases with the increase of the distance from the origin of the receiver. The simulation results can provide reference for the practice of underwater laser communication engineering.