摘要
本文利用双频互相干函数在烟雾信道中的传输模型,分析了光脉冲在不同烟雾浓度下的传输特性。当光学距离小于1时,输出光脉冲形状基本不变,仅有一小拖尾;当光学距离变大时,输出光脉冲将产生严重的展宽及时延现象。数值计算了纳秒光脉冲的传输特性,其结果表明:在烟雾浓度ρ_n=0.5×10~9m^(-3)信道中,光脉冲传输5km后,其纳秒光脉冲被展宽到微秒量级。
In this paper, characteristics of optical pulse propagating in fog channels are investigated in the two-frequency mutual correlation function propagating mode. When the optical distance is less than unity, the pulse shape is substantially unchanged, and only a long tail develops when the optical distance is getting larger, the considerable pulse spread and delay occur,Numerical calculations are given for a nanosecond optical pulse propagating through fog. It is shown that when the fog density is ρ_n=0.5 x 10~9m^(-3),the nanosecond magnitude optical pulse is spread to milisecond within a distance of 5 km.
出处
《光电工程》
CAS
CSCD
1991年第6期33-38,共6页
Opto-Electronic Engineering
关键词
激光
大气传输
激光脉冲
烟雾信道
Laser atmospheric transmissions
Laser pulse
Ns pulses
Transmission characteristics
Numerical analysis
