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激光通信技术是实现高效通信的重要手段。大气激光通信链路中,大气的散射、吸收和湍流严重制约激光传输质量。分析了激光通信系统中由于大气湍流和色散造成的脉宽展宽,计算了脉宽展宽量与湍流大气折射率结构常数、初始脉宽和传输距离之间的关系;比较了不同发射激光脉宽、不同发射能量下的脉冲波形特性。数值计算及仿真结果表明,激光脉宽随传输距离、大气湍流的增大而增大,长脉宽的超短脉冲激光受大气湍流和色散的影响小,并且脉宽增大,激光功率降低,研究结论对超短脉冲的应用具有一定的意义。
Laser communication technology is an important means of achieving efficient communication. Atmospheric laser communication links, atmospheric scattering, absorption and turbulence seriously restrict the quality of laser transmission. The pulse width broadening caused by atmospheric turbulence and dispersion in laser communication system was analyzed. The relationship between pulse width broadening and turbulent atmospheric refractive index structure constant, initial pulse width and transmission distance was calculated. Pulse Waveform Characteristics at Different Emission Energy. The numerical calculation and simulation results show that the laser pulse width increases with the transmission distance and the atmospheric turbulence. The long pulse width ultrashort pulsed laser is less affected by atmospheric turbulence and dispersion, and the pulse width increases and the laser power decreases. The conclusion of the research is of great significance to the application of ultrashort pulse.