部分空间相干自加速光束的传播特性及其在信号传输中的应用研究

The research of self-accelerating beams has been a hot topic in optics in recent years because of their unique properties such as self-accelerating, non-diffracting and self-healing. However, the present works of self-accelerating beams mainly focus on the category of coherent light. Counter to that, this project is proposed to develop self-accelerating beams in the category of partially coherent light. We will investigate the propagation properties of partially spatially coherent self-accelerating beams and their applications on signal transmission: based on phase modulation, partially spatially coherent self-accelerating beams will be generated through manipulating the coherence of conventional self-accelerating beams (Airy beams, non-paraxial Half-Bessel self-accelerating beams). For the further optimal control of the motions of partially spatially coherent self-accelerating beams, the effects of coherence and nonlinearity on the propagation of self-accelerating beams will be also studied theoretically and experimentally. On this basis, we will also study the propagation properties and signal-transmission application of partially spatially coherent self-accelerating beams in disordered media. We will realize the high-fidelity signal transmission of partially spatially coherent self-accelerating beams, to exploit the advantages of self-accelerating beams and partially coherent light applied on signal transmission. Our research provides a promising tool in the future applications of self-accelerating beams such as astronomical observation, biological imaging, optical communication.

自加速光束因其独有传播特性——自加速、无衍射和自修复，成为了近年来光学领域的研究热点。现有的自加速光束研究主要集中在相干光领域。与之相反，本项目拟将自加速光束引入到部分相干光领域，研究部分空间相干自加速光束的传播特性及其在信号传输中的应用：通过相位调制对传统自加速光束（Airy光束、非傍轴半贝塞尔自加速光束等）加以空间相干性调控，产生部分空间相干自加速光束。 从理论和实验上分析空间相干性和非线性对自加速光束传播特性的影响，提出进一步优化其传播特性的调控方案。在此基础上，延伸研究部分空间相干自加速光束在无序介质中的传播特性并将其应用于无序介质中的信号传输，实现携带信号的部分空间相干自加速光束在无序介质中的高保真传输，发挥自加速光束和部分相干光在无序介质信号传输上的优势。本项目的研究可以为未来自加速光束应用于大气天文观测、生物显微成像、光通信等方面提供理论支持和实验基础。

自加速光束的研究由于其独特的特性，例如自加速，非衍射和自修复特性，成为近年来光学领域的热门话题。然而，目前自加速光束的工作主要集中在相干光范畴。与此相反，本项目以研究部分空间相干的自加速光束的传播特性及其在信号传输中的应用作为研究目标。首先，我们研究了部分空间相干的自加速光束的自修复和非线性传播特性。我们发现相干性和非线性会影响自加速光束的传播。并进一步证明，部分空间相干自加速光束表现出更好的自愈和非线性传播特性。在此基础上，我们还研究了无序介质中部分空间相干自加速光束的传播特性和信号传输应用。我们证明，在传播和信号传输方面，部分空间相干的自加速光束比相干情况具有更多优势。另外，基于这些工作和技术，本项目还进行了其他一些光场调控工作，例如光镊和光热电效应上光场调控的重要作用。以上这些研究为天文学观察，生物成像，光通信等自加速光束的未来应用提供了一个有前途的工具