配电网规划及自动化（三）第三讲配电网规划（Ⅱ）

配电网规划及自动化（三）第三讲配电网规划（Ⅱ）陈章潮，顾洁上海交通大学，２０００３０上海ＰＬＡＮＮＩＮＧＡＮＤＡＵＴＯＭＡＴＩＯＮＯＦＰＯＷＥＲＤＩＳＴＲＩＢＵＴＩＯＮＮＥＴＷＯＲＫＣｈｅｎＺｈａｎｇｃｈａｏ；ＧｕＪｉｅＳｈａｎｇｈａｉＪｉａｏｔｏｎ...     

配电网规划及自动化（二） 第二讲 配电网规划（Ⅰ）

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配电网及自动化讲座（六）──第六讲配电网自动化

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配电网及自动化讲座（七）──第七讲 国外电气设备发展动态

配电网及自动化讲座（七）第七讲国外电气设备发展动态陈章潮，顾洁上海交通大学，２０００３０上海ＰＬＡＮＮＩＮＧＡＮＤＡＵＴＯＭＡＴＩＯＮＯＦＰＯＷＥＲＤＩＳＴＲＩＢＵＴＩＯＮＮＥＴＷＯＲＫ￥ＣｈｅｎＺｈａｎｇｃｈａｏ；ＧｕＪｉｅ（ＳｈａｎｇｈａｉＪｉａ...     

配电网规划及自动化（五）第五讲配电网中性点接地方式

配电网规划及自动化（五）第五讲配电网中性点接地方式陈章潮，顾洁上海交通大学２０００３０上海ＰＬＡＮＮＩＮＧＡＮＤＡＵＴＯＭＡＴＩＯＮＯＦＰＯＷＥＲＤＩＳＴＲＩＢＵＴＩＯＮＮＥＴＷＯＲＫ￥ＣｈｅｎＺｈａｎｇｃｈａｏ；ＧｕＪｉｅ（ＳｈａｎｇｈａｉＪｉａｏ...     

配电网规划及自动化（四）第四讲 无功电源优化配置

配电网规划及自动化（四）第四讲无功电源优化配置陈章潮，顾洁上海交通大学，２０００３０上海ＰＬＡＮＮＩＮＧＡＮＤＡＵＴＯＭＡＴＩＯＮＯＦＰＯＷＥＲＤＩＳＴＲＩＢＵＴＩＯＮＮＥＴＷＯＲＫＣｈｅｎＺｈａｎｇｃｈａｏ；ＧｕＪｉｅＳｈａｎｇｈａｉＪｉａｏｔｏｎ...     

配电网规划及其自动化（一）第一讲不确定性负荷预测方法

配电网规划及其自动化（一）第一讲不确定性负荷预测方法陈章潮，顾洁上海交通大学，２０００３０上海ＰＬＡＮＮＩＮＧＡＮＤＡＵＴＯＭＡＴＩＯＮＯＦＰＯＷＥＲＤＩＳＴＲＩＢＵＴＩＯＮＮＥＴＷＯＲＫＣｈｅｎＺｈａｎｇｃｈａｏＧｕＪｉｅＳｈａｎｇｈａｉＪｉａｏｔ...     

新型PRWG1－10F（W）跌落式熔断器的研制

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石门电厂2号A小汽机升速受限故障分析及处理

通过对日本ＷＯＯＤＷＡＲＤ公司生产的ＰＧＡ－ＥＧ装置存在问题的分析,成功地对其进行了改造。     

THE COMMON LAWS OF MASS TRANSFER PROCESSES IN CHEMICAL ENGINEERING

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Polymeric 16×16 arrayed-waveguide grating router usingfluorinated polyethers operating around 1550 nm

A 16×16 arrayed waveguide grating (AWG) router with a channel spacing of 0.8 nm (100 GHz) operating around the 1550-nm wavelength has been fabricated using newly synthesized fluorinated polyethers. It has a good processibility and a high thermal stability up to 510°C. The propagation loss of the buried-channel waveguide is about 0.4 dB/cm at the 1550-nm wavelength. The on-chip insertion loss ranges from 5.5 to 11 dB and the crosstalk is less than -27 dB. The AWG router shows good cyclic rotation property of the wavelength channels with an error smaller than 0.03 nm     

一种任意波形发生器的设计

提出了一种任意波形发生器（AWG）的设计方法,基于现场可编程门阵列（FPGA）的任意波形发生器采用直接数字频率合成（DDS）技术,用硬件描述语言Verilog HDL编程实现。采用该方法设计的任意波形发生器输出的波形具有平滑、稳定度高、频率稳定度和分辨率高等众多优点。     

Design of arrayed-waveguide gratings using hybrid Fourier-Fresneltransform techniques

We describe how transform techniques may be applied to the design of arrayed-waveguide gratings (AWG's). A hybrid Fourier-Fresnel transform model indicates that a flat AWG router passband over 30% of the device free-spectral range (FSR) is feasible. Minimized passband ripple is achieved by applying a subparabolic phase-profile (phase-exponent P=1.82) to the Fourier plane of the AWG. Simulations of a complex-apodized AWG with passband 3 dB width increased from 1 to 12 nm, with a near-trapezoidal amplitude response, and band-edge group delay of 70 ps reduced to 10 ps are presented for a device with a FSR of 40 nm     

基于FPGA设计的采用DDS技术的任意波形发生器

为了能够方便地产生波形平滑、频率稳定的任意波形,本文提出了一种任意波形发生器的设计方法.文中介绍的任意波形发生器采用直接数字频率合成(DDS)技术,用VHDL语言编程实现,集成于可编程逻辑器件(FPGA)中.设计的任意波形发生器可以通过改变相位步进或分频倍数调节频率,通过改变相位控制字调节初始相位,通过改变D/A电阻网络的基准电压调节幅度.通过实验可以看出,采用该方法设计的任意波形发生器输出的波形与传统的波形发生器相比,具有波形平滑、无毛刺、波形稳定度高、频率稳定度和分辨率高等众多优点.     

Analytical and numerical analysis of phase and amplitude errors in the performance of arrayed waveguide gratings

The closed expression of the mean power transfer function for an arrayed waveguide grating (AWG), taking into account fabrication errors, is presented. Comparison with numerical simulations using a previous Fourier optics modeling show good agreement. The procedure to predict the AWG floor level using the numerical modeling is presented and checked against the analytical derived expressions.     

海洋工程用电缆标准IEEE1580导体概述

依据美国海洋工程用电缆标准IEEE 1580对导体规定的描述,介绍了美标电缆导体的AWG线规知识、AWG线规与公制的转换、导体结构以及相关的技术参数等,以期对电缆的制造者及使用者提供参考.     

基于SOPC的任意波形发生器设计

基于SOPC技术的任意波形发生器设计。该任意波形发生器采用了FPGA＋USB通信芯片的硬件构架,具有即插即用的特性,能实现两路可调相位差的任意波形输出,波形频率分辨率达到0.1Hz。另外还可以通过PC端软件编辑任意波形数据,用USB接口下载到SOPC系统上用于产生任意波形,设计中对DDS的结构进行了改进,使其可以在波形切换时实现平滑输出。     

Recent advances in high-density and large-scale AWG multi/demultiplexers with higher index-contrast silica-based PLCs

This paper reviews recent progress on high-density and large-scale arrayed-waveguide-grating (AWG) multi/demultiplexers, which have been developed for wavelength division multiplexing (WDM)-based photonic networks. The AWG has been the key to the construction of flexible and large-capacity WDM networks. This is because, compared with conventional filters consisting of thin-film interference filters and microoptics, the AWG offers the advantages of low loss, high port counts, and mass productivity. To improve such characteristics further, low-loss, higher index-contrast (super-high /spl Delta/) planar lightwave circuits (PLCs) with a bending radius of 2 mm have recently been developed. It has been shown that these PLCs are effective for use in constructing a compact AWG module with 1/5 the volume of a conventional module and large-scale AWGs with 256 and 400 channels. Three techniques for low-loss fiber connection with spot-size converters have also been developed for the super-high /spl Delta/ PLCs, and it has been confirmed that these techniques can be applied to the fabrication of AWG modules. Furthermore, two-stage tandem AWG-type multi/demultiplexers with more than 1000 channels have been demonstrated. This paper describes the progress that has been made on these high-density and large-scale AWGs, which are expected to contribute greatly to the construction of future photonic networks including optical add/drop multiplexing systems and optical crossconnect systems.     

Arrayed waveguide gratings, fiber Bragg gratings, and photonic crystals: an isomorphic Fourier transform light propagation analysis

In this paper, we present a unified Fourier transform (FT) approach to the study of arrayed waveguide grating (AWG), fiber Bragg grating (FBG), and photonic crystal (PC) devices. This methodology allows the design characteristics of transverse (AWG) geometries to be mapped on to longitudinal (or distributed) FBG and PC structures, due to a comprehensive isomorphism between these important passive optical grating-based devices. The unified approach presented here, which is based upon a modified Debye-Waller approach to the analytical solution of the coupled-mode equations, allows intuitive, yet accurate appraisal of arbitrary strength coupled structures. Exploiting this isomorphism, we relate our theoretical work to a number of practical cases. For example, we describe an FBG carousel configuration (analogous to a chirped AWG cascade) offering virtually ripple-free third-order dispersion compensation of 6.61 ps/nm/sup 2/ over a 100-GHz bandwidth.     

基于双 AWG 的新型 FBG 连续解调方法研究

为了实现基于阵列波导光栅(arrayed waveguide grating, AWG)的光纤布拉格光栅(fiber Bragg gratin, FBG)的连续解调, 提出了一种使用两个 AWG 联合解调的方法。 在一个 AWG 相邻两通道光谱中间插入另一个 AWG 对应通道的光谱,组成最小 的光谱周期;每次测量均从三通道中选择光强度最强的两个通道,利用相对光强解调算法,根据其波长—功率关系对 FBG 中心 波长进行精确测量。 使用两个 100 GHz 的 AWG 搭建了实验平台,并对温度传感器的解调进行研究。 实验表明,在 0. 8 nm 的系 统最小动态范围周期内,实现了对 FBG 的连续精确解调,系统的解调线性度达 0. 999 1,波长精度达±4 pm。 对数据和实验结果 进行数学分析,可以将 C 波段范围分成多个波长周期,系统可以实现在 C 波段 40 nm 全周期范围内对单个 FBG 的连续解调。 该方法不但可以实现在 C 波段范围内基于 AWG 对 FBG 的连续解调,使得运用 FBG 可以连续感测外界物理量变化,提高了系 统的实用性。 而且,该方法能够准确解调出波长信息,为实现对 FBG 的连续精确解调提供了借鉴信息,有利于进一步扩大 FBG 的应用领域。