Research progresses of SOI optical waveguide devices and integrated optical switch matrix

1Introduction Dense wavelength division multiplexing(DWDM)is the most powerful method to upgrade the transmission capacity of the optical fiber transmission system.In DWDM system,the enormous available bandwidth is utilized by multiplexing laser beams with different wavelength in one single fiber.With DWDM technology,parallel transmission of data streams with different format leads to high speed information communication,thereby reduces the requirement for the high speed electronic device…     

工业控制组态软件的发展现状及应用

简要地阐述了工业控制组态软件的发展过程和现状，对具有代表性的组态软件ＩｎＴｏｕｃｈ及其应用进行了扼要的介绍，同时讨论了组态软件领域未来的发展趋势。     

手机MMI资源仿真工具的设计与实现

介绍了目前国内主流手机开发商所采用的人机接口界面(MMI)软件开发的现状，分析了现存方法的不足之处，在此基础上提出了将MMI的客户特性和工作代码完全分离的开发MMI资源仿真工具(MST)的方案，以提高手机MMI软件的开发效率。该文讨论了MST目标功能实现的原理，阐述了方案的设计思想，说明了整个系统的结构、原理和开发平台。该系统已被应用于国内手机的开发，并取得了较显著的成效。     

Design and modeling of ultrashort MMI-based couplers

In this work, based on the Gaussian-modes theory, modeling and analysis of ultrashort (<10 µm) MMI couplers is performed. Using the introduced model, temporal behaviors and also other features such as insensitivity to input polarization, insensitivity to operating wavelength and manufacturing tolerances of these devices are studied. In addition, the optimal refractive-index structures with no sensitivity to the polarization are obtained. A comparison is made between this model and the semi-sinusoidal model and it is shown that the Gaussian model is necessary to handle these ultrashort devices. In addition, accuracy of the model is justified using a comparison with results of direct simulations obtained using the FEMLAB environment and FDTD method.     

EIT-based MZ-MMI all-optical switch

We propose a new control structure for all-optical switching in multimode inference (MMI)-based Mach–Zehnder interferometer (MZI) devices. This structure is composed of an MZI doped by three-level nanocrystals for the realization of electromagnetically induced transparency (EIT) in the lower arm. We use two different intensities of control field for two states of the proposed switch. Using a control field in both of the two switching states is necessary, where the EIT region is transparent. By changing the intensity of the control field, the refractive index of the doped region changes, which makes the phase difference between the two arms of the MZI. Hence, the switching operation takes place. Simulation results show that the extinction ratio of the device is ?32dB in the worst case.     

离子交换制作0.85μm MMI光功分器的仿真研究

提出了利用离子交换技术制作多模干涉(MMI)型光功分器的设计方法.以1×8MMI光功分器为例,采用导模传输分析法分析了器件基本原理,对离子交换制作波导的折射率分布进行了讨论.针对工作波长为0.85μm的1×8MMI光功分器结构参数进行了设计,对器件输出特性、各项技术指标、离子交换决定的折射率差Δn对器件性能的影响均进行了BPM仿真,结果表明:利用离子交换方法制作MMI型光功分器,设计指标可达到均匀性约0.009dB、平均插入损耗约9.111dB和最大插入损耗约9.116dB,均优于现有器件的指标.     

轧钢加热炉计算机集成控制系统的研究及实现

设计并开发了一个轧钢加热炉计算机集成控制系统ＦＵＲＮＣＯＮ，介绍了该系统研究背景，系统结构，设计特点，组态配置，界面功能及实现技术。     

MMIC——单片式微波集成电路

本文简单介绍ＭＭＩＣ－－单片式微波集成电路及其应用。