公开(公告)号：US06400478B1

公开(公告)日：2002-06-04

申请号：US09054287

申请日：1998-04-02

申请人： Xin Cheng ,  Shouhua Huang

发明人： Xin Cheng ,  Shouhua Huang

IPC分类号： H04J1402

CPC分类号： H04B10/2503 ,  H04J14/02

摘要： The present invention provides an expandable and cost-effective high capacity optical communication system using wavelength-division-multiplexing, optical direction guide means and bidirectional transmission of data over an optical waveguide. The use of interleaved bidirectional data channels reduces the minimum spacing between data channels, permitting a greater number of channels over a single optical waveguide.

摘要翻译： 本发明提供了一种使用波分复用，光学方向引导装置和通过光波导的数据的双向传输的可扩展和成本有效的大容量光通信系统。 使用交错的双向数据信道减少数据信道之间的最小间隔，允许在单个光波导上的更多数量的信道。

公开(公告)号：US6151336A

公开(公告)日：2000-11-21

申请号：US21619

申请日：1998-02-11

申请人： Xin Cheng ,  Shouhua Huang

发明人： Xin Cheng ,  Shouhua Huang

IPC分类号： H04J3/00 ,  H04J3/22 ,  H04J3/04

CPC分类号： H04J3/22

摘要： The present invention provides an expansion subsystem for dense wavelength division multiplexing systems allowing for the time division multiplexed transmission of lower speed information-bearing signals without regard to data rate or transmission format. The subsystem includes a transmitting station having data buffers, encoders for encoding a unique identification code from a channel identification generator, data scramblers, a multiplexing clock and a time division multiplexing unit, and a receiving station generally the mirror image of the transmitting station.

摘要翻译： 本发明提供了一种用于密集波分复用系统的扩展子系统，其允许低速信息承载信号的时分复用传输，而不考虑数据速率或传输格式。 该子系统包括具有数据缓冲器的发送站，用于从信道识别发生器编码唯一识别码的编码器，数据加扰器，复用时钟和时分复用单元，以及通常是发送站的镜像的接收站。

公开(公告)号：US06594061B2

公开(公告)日：2003-07-15

申请号：US09879795

申请日：2001-06-11

申请人： Shouhua Huang ,  Meirong Tu ,  X. Steve Yao

发明人： Shouhua Huang ,  Meirong Tu ,  X. Steve Yao

IPC分类号： G02F101

CPC分类号： G02F1/0123 ,  H01S5/0265 ,  H01S5/06832 ,  H04B10/503 ,  H04B10/50577 ,  H04B10/58

摘要： Techniques for reducing frequency shifts in an oscillating frequency of an opto-electronic oscillator by having at least two separate optical delay elements in an optical portion of an opto-electronic feedback loop.

公开(公告)号：US06341021B1

公开(公告)日：2002-01-22

申请号：US09023741

申请日：1998-02-13

申请人： Alan E. Wilner ,  David A. Smith ,  Jin-Xin Cai ,  Kai-Ming Feng ,  Xingyu Zou ,  Shouhua Huang

发明人： Alan E. Wilner ,  David A. Smith ,  Jin-Xin Cai ,  Kai-Ming Feng ,  Xingyu Zou ,  Shouhua Huang

IPC分类号： H04J1402

CPC分类号： H04B10/2507 ,  H04J14/0221

摘要： A dynamic power equalization module (10) for an optical network is provided. It includes a module input (16) for receiving an optical transmission (14) containing a combination of different channels (C1-Cn). Each channel (C1-Cn) has a different characteristic wavelength (&lgr;1-&lgr;n) and different varying power. A power equalization device that is polarization insensitive is connected between the module input (16) and a module output (20). The power equalization device is driven by RF acoustic signals (26). A feedback loop (22) receives at least a portion of output from the module output (20) and generates, based upon a comparison of relative powers of the different channels (C1-Cn), the RF acoustic signals (26) which drive the power equalization device. The power equalization device is driven such that it dynamically controls transmission of the different channels (C1-Cn) to substantially equalize power differentials therebetween. The power equalization device includes a parallel array of acousto-optic modulators (AO1-AOn).

摘要翻译： 提供了一种用于光网络的动态功率均衡模块（10）。 它包括用于接收包含不同信道（C1-Cn）的组合的光传输（14）的模块输入（16）。 每个通道（C1-Cn）具有不同的特征波长（lambd1-lambdn）和不同的变化功率。 在模块输入（16）和模块输出（20）之间连接有极化不敏感的功率均衡器件。 功率均衡装置由RF声信号（26）驱动。 反馈回路（22）接收来自模块输出（20）的输出的至少一部分，并且基于不同通道（C1-Cn）的相对功率的比较产生驱动 功率均衡器。 功率均衡装置被驱动，使得其动态地控制不同通道（C1-Cn）的传输，以使它们之间的功率差基本相等。 功率均衡装置包括声光调制器（AO1-AOn）的并联阵列。

公开(公告)号：US06298103B1

公开(公告)日：2001-10-02

申请号：US09098410

申请日：1998-06-16

申请人： Shouhua Huang ,  Bar-Giora Goldberg

发明人： Shouhua Huang ,  Bar-Giora Goldberg

IPC分类号： H04L700

CPC分类号： H04L7/027 ,  H04L7/033

摘要： A Clock timing and Data Recovery (CDR) circuit for reconstructing a clock signal from a high speed data signal that contains no clock signal, such as data in a Non-Return-to-Zero format, and is particularly suitable for high data rate optical communication systems. The circuit uses a reference clock with a frequency that is sufficiently close to the data rate, to keep the circuit tuned to the correct frequency even when input data is absent. When input data is present, a quadrature downconverter mixes the reference clock with a series of pulses corresponding to the transition points of the data signal to produce two intermediate signals. These intermediate signals each go through baseband or intermediate band filters, whose outputs are then quadrature modulated to produce the correct output clock signal. Since the filters operate in a much lower frequency range than the associated data rate, the filters can be comparatively simple and economical, and exhibit superior resistance to aging and environmental effects. A wide range of data rates can be accommodated just by changing the frequency of the reference clock, without having to change the filter parameters. For networks that permit a variety of data rates to be used, automatic data rate detection can allow the correct reference clock frequency to be determined and selected for each incoming data message.

摘要翻译： 时钟定时和数据恢复（CDR）电路，用于从不包含非归零格式的数据的时钟信号的高速数据信号中重构时钟信号，特别适用于高数据速率光 通讯系统 该电路使用具有足够接近数据速率的频率的参考时钟，即使不存在输入数据，也可将电路调谐到正确的频率。 当存在输入数据时，正交下变频器将参考时钟与对应于数据信号的转换点的一系列脉冲混合以产生两个中间信号。 这些中间信号各自经过基带或中频带滤波器，其输出然后被正交调制以产生正确的输出时钟信号。 由于滤波器的工作频率远低于相关的数据速率，所以滤波器可以比较简单和经济，并且具有优异的耐老化性和环境效果。 通过改变参考时钟的频率，可以容纳多种数据速率，而无需更改滤波器参数。 对于允许使用各种数据速率的网络，自动数据速率检测可以允许为每个传入数据消息确定和选择正确的参考时钟频率。