设计了一种改进的准光子晶体光纤, 其包层由呈准八重周期分布的空气孔构成, 其中靠近芯区的两层小空气孔的直径一致, 第三层以外的大空气孔直径一致。采用带有良匹配层(APML)吸收边界的全矢量频域有限差分(FDFD)方法对其色散特性进行了数值分析, 计算了孔间距取1.40～2.50 μm, 小空气孔直径取0.10～0.50 μm, 大空气孔直径取0.20 ～1.00 μm的条件下这种光纤基模的色散曲线。结果表明, 通过调节包层中两种不同尺寸的空气孔的大小以及孔间距这三个参数, 可以得到不同水平的平坦色散曲线。

近年来，随着深度学习的快速发展，脑启发式的人工智能光子神经网络引起了人们的新兴趣。光子神经网络在许多计算任务中有着广泛的应用，例如图像识别、语音处理、计算机视觉和机器翻译等。光子神经网络显著提高了神经网络的计算速度和能源效率，与数字电子相比提高了几个数量级。硅光子学结合了电子学和光子学的优势，为大规模光子神经网络集成实现带来了希望。本文介绍了人工神经网络的基本概念，回顾了硅光子神经网络中的一些重要最新进展，分析其原理及关键器件。希望通过本文综述，能够为研究者们提供光子神经网络的概述，加深对这个新兴领域的研究兴趣。

利用该案例有助于comsol光子晶体光纤的学习，包括几何创建，完美匹配层，模式分析，得出了光子晶体光纤的色散曲线。

photonic-bandgap-comsol-matlab：通过COMSOL-MATLAB脚本计算2D光子晶体的带隙

超材料数学光子晶体透射光谱（MATLAB） 利用传递矩阵法建立了一维光子晶体光学特性的理论描述模型。 基于具有金属纳米粒子的超材料的光子晶体的透射光谱，并在晶体的各种参数下进行了分析。 这是开始编码的主要文件：PhC中没有金属，没有缺陷。 初始条件 材料：GaAs（eps1 = 11.9）和GaN（eps2 = 5.8） 厚度：b = b1 + b2 = 2500 nm

一种基于光子晶体光纤模场变化的压力传感器，段玮倩，杨远洪，本文提出了一种基于光子晶体光纤(PCF)中基模模场直径变化的简便有效且温度无关的压力传感方法。当引入外界压力时，PCF横截面的几何�

In many applications, radio frequency (RF) signals need to be transmitted and processed without being digitalized. Optical fiber provides a transmission medium in which RF modulated optical carriers can be transmitted and distributed with very low loss, making it more efficient and less costly than conventional electronic systems. This volume presents a review of RF photonic components, transmission systems, and signal processing examples in optical fibers from leading academic, government, and industry scientists working in this field. It also introduces the reader to various related technologies such as direct modulation of laser sources, external modulation techniques, and detectors. The text is aimed at engineers and scientists engaged in the research and development of optical fibers and analog RF applications. With an emphasis on design, performance and practical application, this book will be of particular interest to those developing novel systems based on this technology.

Computing the Bandgap of a 2D Photonic Crystal by COMSOL-MATLAB Scripting

加州大学洛杉矶分校(UCLA)电气工程系刘佳明教授的顶级大作。建议从事光纤，光波导，激光，光电子器件设计等方面的研究人员以及学生下载。 Photonic devices lie at the heart of the communications revolution, and have become a large and important part of the electronic engineering field, so much so that many colleges now treat this as a subject in its own right. With this in mind, the author has put together a unique textbook covering every major photonic device, and striking a careful balance between theoretical and practical concepts. The book assumes a basic knowledge of optics, semiconductors, and electromagnetic waves; many of the key background concepts are reviewed in the first chapter. Devices covered include optical fibers, couplers, electro-optic devices, magneto-optic devices, acousto-optic devices, nonlinear optical devices, optical amplifiers, lasers, light-emitting diodes, and photodetectors. Problems are included at the end of each chapter and a solutions set is available. The book is ideal for senior undergraduate and graduate courses, but being device-driven it is also an excellent reference for engineers.

Five conical harmonic beams are generated from the interaction of femtosecond mid-infrared (mid-IR) pulses at a nominal input wavelength of 1997 nm with a 2D LiNbO3 nonlinear photonic crystal with Sierpinski fractal superlattices. The main diffraction orders and the corresponding reciprocal vectors involved in the interaction are ascertained. Second and third harmonics emerging at external angles of 23.82° and 36.75° result from nonlinear ?erenkov and Bragg diffractions, respectively. Three path