Sunilkumar K, Anand N, Satheesh S K, Krishna Moorthy K, Ilavazhagan G
Opt Express. 2021 Jan 18;29(2):865-876. doi: 10.1364/OE.409794.
Propagation through turbulent media produces complex amplitude fluctuations and temporal spreading of narrow optical pulses. Light-absorbing aerosols present in the atmospheric transmission path will perturb the refractive index structure parameter (Cn2) through atmospheric heating. The consequent enhancement in broadening and attenuation of ultrashort (femtosecond) optical pulses has been calculated by combining multi-satellite observations, radiosonde profiles and computational radiative transfer. It is shown that narrower optical pulses are more vulnerable to aerosol-induced impairments while broader pulses are more resilient, notwithstanding three to four orders of enhanced optical scintillation.
通过湍流介质传播会产生复杂的幅度波动以及窄光脉冲的时间展宽。大气传输路径中存在的吸光气溶胶会通过大气加热干扰折射率结构参数（Cn2）。通过结合多卫星观测、无线电探空仪剖面和计算辐射传输，已经计算出了超短（飞秒）光脉冲展宽和衰减的相应增强。结果表明，尽管光闪烁增强了三到四个数量级，但较窄的光脉冲更容易受到气溶胶引起的损伤，而较宽的脉冲则更具弹性。
