Design and experimental verification of a monolithic complete-light modulator based on birefringent materials
Design and experimental verification of a monolithic complete-light modulator based on birefringent materials
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基于双折射材料的单片全光调制器的设计与实验验证
DOI：
10.1364/prj.7.000875
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发表时间：
2019
影响因子：
7.6
通讯作者：
Deng Qiling
中科院分区：
文献类型：
--
作者：
Pang Yingfei;Cao Axiu;Wang Jiazhou;Pang Hui;Yan Wei;Wu Xiangdong;Shi Lifang;Deng Qiling
本文提出了一种设计单片全光调制器的方法，它可以完全控制入射光的振幅、相位和偏振。MCLM由双折射材料制成，该双折射材料对正交本征偏振、寻常o态和非常e态提供不同的折射率。我们提出了一种优化方法来计算两个浮雕深度分布的两个本征偏振。提出了一种联合收割机将两种浮雕深度分布合并为一种浮雕深度分布的算法。通过数值模拟，得到了激光束通过特征尺寸为8 μm的16个深度级微结构时的光场分布，包括振幅、相位和4种偏振态的信息。该结构是通过普通光刻制作的。还建立了实验光学系统来测试MCLM的光学效果和性能。MCLM的实验性能与仿真结果一致，验证了本文所提算法的有效性。
This paper presents a method to design a monolithic complete-light modulator (MCLM) that fully controls the amplitude, phase, and polarization of incident light. The MCLM is made of birefringent materials that provide different refractive indices to orthogonal eigen-polarizations, the ordinary o and extraordinary e states. We propose an optimization method to calculate the two relief depth distributions for the two eigen-polarizations. Also, a merging algorithm is proposed to combine the two relief depth distributions into one. The corresponding simulations were carried out in this work and the desired light distribution, including information on amplitude, phase, and four polarization states, was obtained when a laser beam passed through a 16-depth-level micro-structure whose feature size is 8 μm. The structure was fabricated by common photolithography. An experimental optical system was also set up to test the optical effects and performances of the MCLM. The experimental performance of the MCLM agrees with the simulation results, which verifies the validity of the algorithms we propose in this paper.