Parandin Fariborz, Kamarian Reza, Jomour Mohamadreza
Appl Opt. 2021 Mar 10;60(8):2275-2280. doi: 10.1364/AO.419737.
A comparator is one of the important combinational logic circuits. An optical comparator was designed and simulated based on photonic crystals. Point and linear defects were also used in the proposed optical comparator. The use of simple defect paths and the absence of ring resonators reduced the complexity of the structure. One of the characteristics of the proposed structure is that it has a very small size, which leads to the suitability of this comparator for optical integrated circuits. Another characteristic of this comparator is an increase in the optical power difference for the logical values "0" and "1," which reduces the bit detection error in the output. This comparator is also designed to operate on the 1.55 µm wavelength, and it can be used in today's optical telecommunication circuits.
比较器是重要的组合逻辑电路之一。基于光子晶体设计并模拟了一种光学比较器。所提出的光学比较器还使用了点缺陷和线缺陷。简单缺陷路径的使用以及环形谐振器的缺失降低了结构的复杂性。所提出结构的一个特点是其尺寸非常小，这使得该比较器适用于光集成电路。该比较器的另一个特点是逻辑值“0”和“1”的光功率差增大，这减少了输出中的比特检测误差。这种比较器还设计为在1.55微米波长下工作，并且可用于当今的光通信电路。
