采用深度学习校正畸变涡旋光束的方法综述(特邀)

Advances in the compensation of distorted vortex beams through deep learning (invited

  • 摘要: 涡旋光束是一种携带轨道角动量的新型结构光场,在超大容量光通信、遥感探测等领域有着广阔的应用前景。涡旋光束在大气等非均匀介质中传输时会产生波前畸变,使得其携带的轨道角动量发生改变,对实际应用产生不利影响,因此需要引入自适应光学波前校正技术对其进行畸变校正。综述了近年来国内外学者在涡旋光束自适应畸变校正方面的研究进展,首先简要介绍了当前较为成熟的涡旋光束畸变校正技术,包括高斯光束探针与波前传感相结合、相位恢复算法与面阵探测技术相结合等技术方案;然后着重介绍了基于深度学习的新型涡旋光束畸变校正技术,包括泽尼克多项式系数反演、湍流相位屏反演等,同时讨论了将深度学习用于涡旋光束畸变校正的优势及局限性;最后展望了涡旋光束自适应畸变校正技术的发展趋势。

     

    Abstract: Vortex beam is a kind of novel structured beam with helical wavefront and carries orbital angular momentum (OAM). Such structured field can find applications in many domains as large-capacity data transmission, remote detection, etc. The wavefront aberration occurs when the vortex beam propagates in a non-homogeneous medium as atmosphere turbulence, resulting in the OAM changing and go against practical applications. Therefore, it is necessary to compensate distorted vortex beams through adaptive optics. The recent advances on adaptive correction of distorted vortex beams was mainly reviewed. The current mature correction schemes were firstly introduced in brief, including wavefront sensing along with probe Gaussian beams, array detection along with phase retrieval algorithms, and so on. Then the deep-learning-based approaches were highlighted, as Zernike polynomial coefficients inversion, turbulence phase screen inversion, etc. The advantages and limitations of employing deep learning for distorted vortex beam compensation were also discussed. Finally, development trends of distortion compensation of vortex beams were prospected.

     

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