Dynamic shaping of orbital-angular-momentum beams for information encoding
Dynamic shaping of orbital-angular-momentum beams for information encoding
复制标题
用于信息编码的轨道角动量光束的动态整形
DOI：
10.1364/oe.26.001796
复制
发表时间：
2018-01-22
期刊：
影响因子：
3.8
通讯作者：
Gong, Lei
中科院分区：
文献类型：
--
作者：
Hu, Xinyao;Zhao, Qian;Gong, Lei
利用数字微镜器件（DMD）实现复杂光场的整形，由于其在光通信和显微镜等领域的潜在应用，近年来引起了人们的广泛关注。本文提出了一种利用二元DMD实现轨道角动量（OAM）光束动态整形的优化Lee方法。为了提高二值振幅全息图的设计精度，提出了一种误差扩散算法，使得在保持高分辨率的同时实现高保真度的波前整形成为可能。作为概念证明，我们应用这种方法来创建不同类别的OAM光束。数值模拟验证了对于具有完全独立的相位和幅度调制的所有测试OAM场，可以实现F > 0.985的保真度。此外，我们实验证明了不同的OAM光束，包括纯模式和混合模式的动态整形开关速率高达17.8 kHz。在此基础上，实现了将准确的信息编码到所生成的复用OAM光束中，这提供了对采用空间模式编码的高速经典和量子通信的访问。(c)根据OSA开放获取出版协议的条款，2018年美国光学学会。
Shaping complex fields with a digital micromirror device (DMD) has attracted much attention recently due to its potential application in optical communication and microscopy. In this paper, we present an optimized Lee method to achieve dynamic shaping of orbital-angular-momentum (OAM) beams using a binary DMD. An error diffusion algorithm is introduced to enhance the accuracy for binary-amplitude hologram design, making it possible to achieve high fidelity wavefront shaping while retaining a high resolution. As a proof of concept, we apply this method to create different classes of OAM beams. The numerical simulations verify that a fidelity of F > 0.985 can be achieved for all the test OAM fields with fully independent phase and amplitude modulation. Moreover, we experimentally demonstrate the dynamic shaping of different OAM beams including pure modes and mixed modes with a switching rate of up to 17.8 kHz. On this basis, accurate information encoding into the generated multiplexed OAM beams is accomplished, which provides access to high speed classical and quantum communications that employ spatial mode encoding. (c) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.