Yang Dongyu, Zhang Yixin, Shi Haifeng
Appl Opt. 2019 Dec 1;58(34):9484-9490. doi: 10.1364/AO.58.009484.
Based on the power spectrum of the index fluctuation with the outer scale of seawater turbulence, we develop the channel capacity of oceanic turbulence links with carrier Bessel-Gaussian vortex localized waves. By this capacity model, we investigate the influences of seawater turbulence and carrier parameters on the channel capacity. The results show that a higher rate of dissipation of kinetic energy per unit mass of fluid, larger inner scale, or lower dissipation rate of the mean-squared temperature causes the higher channel capacity; the Bessel-Gaussian localized vortex wave with a larger source transverse size, smaller Bessel cone angle, lower orbital angular momentum quantum number, or broader initial half-pulse width has stronger resistance to oceanic turbulent perturbation. This work provides a theoretical basis for realizing high-capacity oceanic optical communication with carrier Bessel-Gaussian vortex localized waves.
基于具有海水湍流外尺度的指数涨落功率谱，我们推导了携带贝塞尔 - 高斯涡旋局域波的海洋湍流链路的信道容量。通过该容量模型，我们研究了海水湍流和载波参数对信道容量的影响。结果表明，单位质量流体的动能耗散率越高、内尺度越大或均方温度耗散率越低，信道容量越高；源横向尺寸较大、贝塞尔锥角较小、轨道角动量量子数较低或初始半脉冲宽度较宽的贝塞尔 - 高斯局域涡旋波对海洋湍流扰动具有更强的抗性。这项工作为实现携带贝塞尔 - 高斯涡旋局域波的高容量海洋光通信提供了理论基础。
