新型相干结构光场调控及应用研究进展

Research advances of partially coherent beams with novel coherence structures:engineering and applications

结构光场的空域调控包括振幅、相位、偏振、相干度等丰富自由度,对其自由度的单一或联合调控引发了一系列新奇物理效应,在新型结构光场构建及多种领域中具有重要应用。相比于完全相干光场,部分相干光场在抵抗散斑噪声和大气湍流扰动等方面具有独特优势。近年来,具有新型相干结构的部分相干光束在大气传输、光学加密与成像、信息鲁棒传输、高质量光束整形等领域有着重要研究价值。本文详细综述了具有新型相干结构部分相干光场的理论构建与实验合成的研究进展,并重点介绍了新型相干结构光场在复杂环境中的鲁棒传输特性及其在光学加密、成像、鲁棒信息传输及光束整形中的应用研究进展。研究表明,新型相干结构光场调控不仅提供了一种有效抵抗复杂环境扰动的有效手段,而且丰富了光场调控技术在多种领域中的应用。最后,对新型相干结构调控技术发展趋势及潜在应用前景进行了展望。

Structured light has rich adjustable spatial degrees of freedom,including amplitude,phase,polarization,degree of coherence,etc.The modulation of these degrees of freedom has triggered a variety of novel physical effects and has found use in constructing new structured light beams and a large range of applications.Compared to the fully coherent light,partially coherent beams(PCBs)have advantages in resisting the speckle noise and the fluctuations of atmospheric turbulence.Recently,the PCBs with nonconventional coherence structures have been found to have important potential applications in atmospheric transmission,optical encryption and imaging,robust information transmission,and high-quality beam shaping.In this review,we summarize in detail the progress of the theoretical construction and experimental generation of PCBs with novel coherence structures.Meanwhile,we outline their robust propagation properties in complex media and important applications in optical encryption,imaging,robust information transfer,and beam shaping.It is found the modulation of spatial coherence structure of PCBs provides not only an efficient way to resist the random fluctuations of complex environments,but also a new degree of freedom to enrich the application scopes of structured light.Finally,the development trend and the further applications of the nonconventional coherence structure engineering are prospected.