In this paper, we present a new construction of an optical analog-to-digital converter in photonic crystals structure. The proposed structure consists of a Y-branch and three cavities based on nonlinear Kerr effect with different resonant modes in array of 37 × 19 dielectric rods. This effect allows resonant modes of cavities to be shifted to lower frequencies, which means their optical behavior depends on the intensities of optical input. One input and two output ports in a structure composed of silicon rods surrounded by air result in the desired binary output values. The normalized output power threshold for logic 0 and 1 are assumed 10% and 50%, respectively. The total footprint and the sampling rate for the proposed structure are approximately equal to 253 µm² and 600 GS/s, respectively. This novel structure works in 1550 nm, and all the simulations and calculations are done based on finite-different time domain and plane wave expansion methods.

在本文中，我们提出了一种在光子晶体结构中的光学模数转换器的新结构。所提出的结构由一个Y分支和三个基于非线性Kerr效应的腔体组成，具有37×19介电棒阵列中的不同共振模式。这种效应使谐振腔的共振模式可以转移到较低的频率，这意味着它们的光学行为取决于光输入的强度。由空气包围的硅棒组成的结构中的一个输入端口和两个输出端口产生所需的二进制输出值。逻辑0和1的归一化输出功率阈值分别假定为10％和50％。拟议结构的总占地面积和采样率大约等于253 µm ²和600 GS / s。这种新颖的结构在1550 nm下工作，并且所有的仿真和计算都是基于有限差分时域和平面波展开方法进行的。