论文标题
基于多透明模式的基于硅的片上光相监测，基于硅的光学处理器
On-chip Optical Phase Monitoring in Multi-Transverse-Mode Integrated Silicon-based Optical Processors
论文作者
论文摘要
我们在220 nm厚的硅光子学上设计了多透明模式光学处理器（MTMOP），利用前两个准透明电动模式（TE0和TE1）。目的是测量对光学处理器进行编程所需的光相，而无需使用常规光学相位检测技术（例如，相干检测）。在拟议的设计中，我们使用了一个新颖但简单的构建块，该块将光相转换为光功能。模式TE0随着模式TE1用于编程目的而带有主要的光学信号。 MTMOP操作依赖于以下事实：TE0和TE1的组速度通过模式敏感相位变速子繁殖是不同的。不平衡的马切德干涉仪（MZI）由两个臂上的模式敏感和模式不敏感的相位变速器组成。我们设置了相位变速器的偏见，以便在两个臂中繁殖的TE0在TE1中并非如此。因此，我们通过测量TE1的光功率的变化来检测到TE0应用于TE0的相移。据我们所知，这种设计是使用完全集成的编程单元利用多模硅光子学实现可编程光学处理器的尝试。
We design a Multi-Transverse-Mode Optical Processor (MTMOP) on 220 nm thick Silicon Photonics exploiting the first two quasi-transverse electric modes (TE0 and TE1). The objective is to measure the optical phase, required for programming the optical processor, without use of conventional optical phase detection techniques (e.g., coherent detection). In the proposed design, we use a novel but simple building block that converts the optical phase to optical power. Mode TE0 carries the main optical signal while mode TE1 is for programming purposes. The MTMOP operation relies on the fact that the group velocity of TE0 and TE1 propagating through a mode-sensitive phase shifter are different. An unbalanced Mach-Zehnder interferometer (MZI) consists of a mode-sensitive and mode-insensitive phase shifters in the two arms. We set the bias of the phase shifters so that TE0 propagating in the two arms constructively interfere while this will not be the case for TE1. Hence, we detect the phase shift applied to TE0 by measuring the variation in the optical power of TE1. To the best of our knowledge, this design is the first attempt towards realizing a programmable optical processor with fully integrated programming unit exploiting multimode silicon photonics.
