A binary phase-only modulation technique was proposed to focus and scan light through a multimode fiber (MMF) based on spatial light modulator (SLM). For the same number of modulation modes, the number of iterations using this method is only 1/256 of that using phase-only iterative optimization or 1/3 of that using phase-only computation optimization, and the modulation time is at least one to two orders of magnitude shorter than previous wavefront shaping systems. Focusing and scanning light through an MMF with a 105 μm core diameter and 5 m length was achieved experimentally. This method can be extended to focus and scan light at multiple planes along the axial direction by modifying the input wavefront accordingly.

提出了一种基于二进制的仅相位调制技术，以通过基于空间光调制器（SLM）的多模光纤（MMF）聚焦和扫描光。对于相同数量的调制模式，使用此方法的迭代次数仅为使用纯相位迭代优化的迭代次数的1/256或使用纯相位计算优化的迭代次数的1/3，并且调制时间至少为比以前的波前整形系统短两个数量级。通过实验实现了通过具有105μm核心直径和5 m长度的MMF聚焦和扫描光。通过相应地修改输入波阵面，可以将该方法扩展为沿轴向在多个平面上聚焦和扫描光。