公开(公告)号：US20130039656A1

公开(公告)日：2013-02-14

申请号：US13205055

申请日：2011-08-08

申请人： Cedric F. Lam ,  Hong Liu

发明人： Cedric F. Lam ,  Hong Liu

IPC分类号： H04J14/00 ,  H04J14/02

CPC分类号： H04J14/0282 ,  H04J14/0232 ,  H04J14/0235 ,  H04J14/0246 ,  H04J14/0247 ,  H04J14/025 ,  H04J14/0252 ,  H04J14/0265

摘要： A hybrid passive optical network (“PON”) includes a time-division multiplexing (“TDM”) optical line terminal (“OLT”) and a wavelength-division multiplexing (“WDM”) OLT. The TDM OLT communicates with a first group of customer premises (“CPs”) via TDM signals while the WDM OLT communicates with a second group of CPs via WDM signals. A remote node power splitter is coupled to receive the TDM and WDM signals and broadcast both the TDM signals and the WDM signals on all of its ports facing towards the CPs. Optical filters are disposed between the remote node power splitter and the second group of CPs. Each optical filter is configured to pass a sub-group of the WDM signals while blocking other WDM signals such that each of the second group of CPs receives its own allocation of WDM signals but does not receive WDM signals allocated to other CPs of the second group of CPs.

摘要翻译： 混合无源光网络（PON）包括时分复用（TDM）光线路终端（OLT）和波分复用（WDM）OLT。 TDM OLT通过TDM信号与第一组客户端（CP）通信，而WDM OLT经由WDM信号与第二组CPC通信。 远程节点功率分配器被耦合以接收TDM和WDM信号，并且在其面向CP的所有端口上广播TDM信号和WDM信号。 光学滤波器设置在远程节点功率分配器和第二组CP之间。 每个滤光器被配置成通过WDM信号的子组同时阻挡其它WDM信号，使得第二组CP中的每一个接收到其自己的WDM信号分配，但是不接收分配给第二组的其他CP的WDM信号 的CP。

公开(公告)号：US20110293279A1

公开(公告)日：2011-12-01

申请号：US12788204

申请日：2010-05-26

申请人： Cedric F. Lam ,  Hong Liu

发明人： Cedric F. Lam ,  Hong Liu

IPC分类号： H04J14/02

CPC分类号： H04J14/02 ,  H01S5/0265 ,  H01S5/06256 ,  H01S5/4031 ,  H01S5/4087 ,  H04J14/0279

摘要： Techniques, devices and systems for optical communications based on wavelength division multiplexing (WDM) that use tunable multi-wavelength laser transmitter modules.

摘要翻译： 基于使用可调谐多波长激光发射器模块的波分复用（WDM）的光通信技术，设备和系统。

公开(公告)号：US07860393B1

公开(公告)日：2010-12-28

申请号：US12313716

申请日：2008-11-24

申请人： Martin Birk ,  Patrick P. Iannone ,  Kenneth C. Reichmann ,  Nicholas J. Frigo ,  Cedric F. Lam

发明人： Martin Birk ,  Patrick P. Iannone ,  Kenneth C. Reichmann ,  Nicholas J. Frigo ,  Cedric F. Lam

IPC分类号： H04J14/00

CPC分类号： H04J14/02 ,  H04J14/0298

摘要： A system and method for simultaneous delivery of a plurality of independent blocks of 500 MHz digital broadcast television services, stacking a plurality of RF blocks on a plurality of spectrally sliced WDM optical bands. The method for delivering a plurality of video blocks to a user terminal serviced by a remote node comprises the steps of receiving, by a first WDM, a broadband signal from a broadband signal source, separating, by the first WDM, the broadband signal into a plurality of optical hands, modulating each of the plurality of optical bands with a composite signal representing data in a plurality of independent RF blocks to form a plurality of modulated signals, forwarding the plurality of modulated signals to a second WDM to form a combined broadcast signal, transmitting the combined broadcast signal over feeder fiber to a remote node, selecting a RF block for distribution over a distribution fiber to a conventional satellite set-top box at a user's site and forwarding the selected RF block to the user's site. A novel method and system for reducing spontaneous beat noise is also described.

摘要翻译： 一种用于同时传送500MHz数字广播电视服务的多个独立块的系统和方法，在多个频谱分片的WDM光谱带上堆叠多个RF块。 用于将多个视频块传送到由远程节点服务的用户终端的方法包括以下步骤：由第一WDM从宽带信号源接收宽带信号，由第一WDM将宽带信号分离成 多个光手，用表示多个独立RF块中的数据的复合信号调制多个光带中的每一个以形成多个调制信号，将多个调制信号转发到第二WDM以形成组合的广播信号 通过馈线光纤将组合的广播信号发送到远程节点，通过分配光纤选择RF块以传送到用户现场的常规卫星机顶盒，并将所选择的RF块转发到用户的站点。 还描述了一种用于减少自发节拍噪声的新颖方法和系统。

公开(公告)号：US07027733B2

公开(公告)日：2006-04-11

申请号：US10026888

申请日：2001-12-27

申请人： Mark D. Feuer ,  Nicholas J. Frigo ,  Cedric F. Lam

发明人： Mark D. Feuer ,  Nicholas J. Frigo ,  Cedric F. Lam

IPC分类号： H04J14/00

CPC分类号： H04Q11/0005 ,  H04Q11/0062 ,  H04Q2011/0016 ,  H04Q2011/0022 ,  H04Q2011/0026 ,  H04Q2011/0032 ,  H04Q2011/0035 ,  H04Q2011/0047 ,  H04Q2011/0058

摘要： A method and a system in which selected wavelengths of a wavelength division multiplexed (WDM) signal are modulated with multicast data for multicasting data services on an optical network. The WDM signal is received from a hub node of the optical network, such as a unidirectional ring network or a bi-directional ring network. A four-port wavelength crossbar switch (4WCS) selectably switches selected wavelengths from the optical network to a modulator loop. The modulator loop includes a multicast modulator that modulates the selected plurality of wavelengths with the multicast data. Each modulated wavelength is then switched back to the optical network by the 4WCS switch, and sent to a plurality of subscriber nodes of the optical network. This architecture allows a facility provider to be physically separated from a content provider, and affords the flexibility of selectively delivering multicast content to individual subscribers.

摘要翻译： 一种方法和系统，其中波分复用（WDM）信号的选定波长用组播数据进行调制，用于在光网络上组播数据业务。 从光网络的集线器节点（例如单向环网或双向环网）接收WDM信号。 四端口波长交叉开关（4WCS）可选择地将所选波长从光网络切换到调制器环路。 调制器环路包括用多播数据调制所选择的多个波长的多播调制器。 然后通过4WCS交换机将每个调制波长切换回光网络，并发送到光网络的多个订户节点。 该架构允许设施提供者在物理上与内容提供商分离，并且提供选择性地将多播内容递送给个体用户的灵活性。

公开(公告)号：US06959154B1

公开(公告)日：2005-10-25

申请号：US09722646

申请日：2000-11-28

申请人： Alan H. Gnauck ,  Cedric F. Lam ,  Sheryl L. Woodward

发明人： Alan H. Gnauck ,  Cedric F. Lam ,  Sheryl L. Woodward

IPC分类号： G02B6/00 ,  H04B10/02 ,  H04B10/18 ,  H04B10/00 ,  H04B10/06 ,  H04B10/08 ,  H04B17/00

CPC分类号： H04B10/2507

摘要： Link robustness, chromatic dispersion and polarization mode dispersion (PMD) immunity can be improved in fiber optical system by using a method for receiving an optical double sideband signal over an optical fiber system, comprising the steps of splitting the received optical double sideband signal into an upper sideband signal and a lower sideband signal, photodetecting the upper sideband and the lower sideband, equalizing the photodetected upper sideband signal and the lower sideband signal, and combining the equalized upper sideband signal with the equalized lower sideband signal. While PMD compensation is envisioned as a major application, one may also use the method and system for chromatic dispersion compesation or dispersion slope compensation in high bit rate systems, i.e. using dispersion compensation fiber (DCF) for coarse compensation and diversity receiver with electrical equalizer for fine tuning.

摘要翻译： 通过使用用于在光纤系统上接收光学双边带信号的方法，可以在光纤系统中改善链路鲁棒性，色散和偏振模色散（PMD）抗扰度，包括以下步骤：将接收到的光双边带信号分割为 上侧边带信号和下边带信号，对上边带和下边带进行受光，均衡受光的上边带信号和下边带信号，并将均衡的上边带信号与均衡的下边带信号进行组合。 虽然PMD补偿被设想为主要应用，但也可以在高比特率系统中使用用于色散补偿或色散斜率补偿的方法和系统，即使用用于粗略补偿的色散补偿光纤（DCF）和具有电均衡器的分集接收器 微调。

公开(公告)号：US06871020B1

公开(公告)日：2005-03-22

申请号：US09825019

申请日：2001-04-03

申请人： Mikhail Boroditsky ,  Nicholas J. Frigo ,  Cedric F. Lam

发明人： Mikhail Boroditsky ,  Nicholas J. Frigo ,  Cedric F. Lam

IPC分类号： H04B10/02 ,  H04B10/08 ,  H04J14/02

CPC分类号： H04J14/0221 ,  H04B10/07955 ,  H04J14/0201 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/0206 ,  H04J14/021 ,  H04J14/0213

摘要： A power spectrum measurement system and a method monitor a power spectrum of N-channels in an M-channel wavelength division multiplexed optical communication network, where N is less than or equal to M. An add-drop node in the network drops a channel and adds a channel for transmitting data on the network. The added channel has the same wavelength as the dropped channel. The power of the added channel is controlled to minimize crosstalk. The power spectrum measurement system includes a detection circuit and a processing circuit. The detection circuit is an inexpensive, scalable circuit for detecting the power of each channel. The processing circuit is connected to the detection circuit and calculates the power of each channel based upon the power detected by the detection circuit. The processing circuit also calculates power of the added channel for minimizing crosstalk. The calculated power of the added channel is a function of the powers measured for the N-channels, including but not limited to the average power of the N-channels or the powers of the channels adjacent the added channel. The calculated power is transmitted to the node adding the channel for controlling the power of the added channel.

摘要翻译： 功率谱测量系统和监视M信道波分复用光通信网络中的N信道的功率谱的方法，其中N小于或等于M.网络中的添加点节点丢弃信道， 添加了一个在网络上传输数据的通道。 添加的通道具有与丢弃通道相同的波长。 控制附加通道的功率以最小化串扰。 功率谱测量系统包括检测电路和处理电路。 检测电路是用于检测每个通道的功率的廉价的可扩展电路。 处理电路连接到检测电路，并根据检测电路检测到的功率来计算每个通道的功率。 处理电路还计算附加信道的功率以最小化串扰。 所添加的信道的计算功率是对N个信道测量的功率的函数，包括但不限于N个信道的平均功率或与相邻信道相邻的信道的功率。 所计算的功率被传送到添加用于控制所添加的信道的功率的信道的节点。