一种用单模光纤制作亚微米周期光栅的方法

本文报道一种用单模光纤制作亚微米周期光栅的全息方法,并详细分析和讨论了影响光栅质量的各种因素。实践证明这一方法完全适于制作面积不小于10×10mm~2适于集成光学元件需要的高质量光栅。     

Ku波段脉冲耿氏振荡器

文章描述了脉冲耿氏管、微波电路和脉冲调制器的结构和设计原则;给出了Ku波段脉冲耿氏振荡器的研制结果:在13～15GHz范围内,脉冲功率大于5W,工作比≤1％,最大效率为5％。     

Novel integrated optic intensity modulator based on mode coupling

The analysis, design, realization, and measurements of a novel intensity modulator are reported. The operating principle is based on mode coupling between a passive low-loss SiON waveguide and an electro-optic high-loss polymer waveguiding structure. Matching the waveguides is critical and results in severe demands for the technology. Extended simulations by the Coupled Mode Theory, the Leaky Wave Model, and Finite Difference Beam Propagation Method resulted in the design of several modulator structures. After realization, modulation could be demonstrated at 632 nm and at 1523 nm using lossy waveguiding modes and surface plasmon modes.     

广义网络理论结合平面电路法优化功率分配元件

本文研究的一分为二功率分配元件是无耗偶对称互易网络。采用网络理论研究了元件的最佳工作点；提出了广义网络理论结合平面电路法优化了功率分配元件。文中还给出了计算实例，所得结果与实验结果比较吻合。     

一种用于神经计算的竞争电路的设计

作为一种重要的神经元网络的竞争电路，以往的电路实现结构往往有电路复杂度大和相互联接过多的缺点，不利于ＶＬＳＩ实现。在ｒａｉｌ－ｔｏ－ｒａｉｌ放大器结构的基础上，提出了一咱新的ＣＭＯＳ电路实现方法，解决了这些问题。ＨＳＰＩＣＥ的模拟结果证明了设计的正确性。     

ZXJ10高可靠性设计与实现技术

本文通过介绍 ZXJ10数字程控交换系统所采用的总线结构、控制方式、软件结构、硬件设计及其它先进技术,说明该系统具有高可靠性。     

Proportional BIC sensor for current testing

A new design of a BIC sensor for current testing static CMOS circuits is proposed. It is based on a lateral BJT device which is easy to incorporate in any standard CMOS process. The design diverts a fraction of the I _DDQ current from the cell under test and a resistive component generates a voltage proportional to I _DDQ . Additional features are the possibility of continuous measure of i _dd and increased speed of this sensor compared with sensors based on the current integration principle. The design does not have substrate currents due to the parasitic vertical BJTs. Experimental work on the sensor is reported.     

Model conversions of uncertain linear system using the improved block-pulse function approach

This paper presents an improved block-pulse function approach to convert a continuous-time (respectively, discrete-time) structured uncertain linear system into an equivalent discrete-time (respectively, continuous-time) structured uncertain linear model. The concept of the principle of equivalent areas is utilized for the uncertain model conversions. This allows the use of well-established theorems and algorithms in the discrete-time (respectively, continuous-time) domain to indirectly solve the continuous-time (respectively, discrete-time) domain problems. A numerical example is given to demonstrate the effectiveness of the proposed method.     

Single mode lasers based on monolithic integration of ridge waveguides with 2D photonic crystal waveguides

The monolithic combination of active light sources with photonic crystal (PC) waveguide components is a key building block for future highly integrated photonic circuits. We demonstrate the coupling of light from an InGaAs/AlGaAs ridge waveguide laser to a monolithically integrated 2D PC waveguide. The PC guide is formed by removing three or five rows in a triangular lattice of air rods etched into the semiconductor. A tapered ridge waveguide geometry is demonstrated to improve coupling efficiency, so that maximum output powers of up to 10 mW from the PC waveguide are achieved. The resulting coupled cavity laser shows single mode emission with side mode suppression ratios > 35 dB over a broad range of injection currents.     

一种适用于EDA电子系统分析软件的数学伴随方程建模的新方法研究

电子线路与电子系统机辅分析的精度取决于所用的各种电路元件等效模型的精度，而如何建立各种电路元件精确的等效模型同时又要满足机辅分析对自动黑盒建模的要求是ECAD和EDA技术面临的难题，本文采用数学方程的综合推导和伴随方程的进一步完善，较好的从理论上解决这一难题，为ECAD和EDA技术的进一步发展提供了理论保障