Wu Jun, Tang Xinquan, Xia Jun
Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, China.
Nanomaterials (Basel). 2019 Jan 11;9(1):87. doi: 10.3390/nano9010087.
At present, people are using holographic technologies to shape complex optical beams for both fundamental research and practical applications. However, most of the reported works are focusing on the generation of a single beam pattern based on the computer-generated hologram (CGH). In this paper, we present a method for simultaneously shaping the multiple beam lattice where the intensity and phase of each individual beam can be prescribed along an arbitrary geometric curve. The CGH that is responsible for each individual beam is calculated by using the holographic beam shaping technique, afterwards all the CGHs are multiplexed and encoded into one phase-only hologram by adding respective linear phase grating such that different curves are appeared in different positions of the focal regions. We experimentally prove that the simultaneous generation of multiple beams can be readily achieved. The generated beams are especially useful for applications such as multitasking micro-machining and optical trapping.
目前，人们正在利用全息技术来塑造复杂光束，用于基础研究和实际应用。然而，大多数已报道的工作都集中在基于计算机生成全息图（CGH）生成单一光束图案上。在本文中，我们提出了一种同时塑造多光束晶格的方法，其中每个单独光束的强度和相位可以沿着任意几何曲线规定。通过使用全息光束整形技术计算负责每个单独光束的CGH，然后通过添加各自的线性相位光栅将所有CGH复用并编码为一个纯相位全息图，使得不同曲线出现在焦区的不同位置。我们通过实验证明，可以很容易地实现多光束的同时生成。所生成的光束对于多任务微加工和光镊等应用特别有用。
