知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

53 条记录 (耗时 0.017 秒)

    SELECTABLE MULTIPLE-WAVELENGTH ACCESS FOR OPTICAL NETWORK UNITS IN ARRAYED WAVEGUIDE BASED WAVELENGTH DIVISION MULTIPLEXING PASSIVE OPTICAL NETWORK
    1.
    发明申请
    SELECTABLE MULTIPLE-WAVELENGTH ACCESS FOR OPTICAL NETWORK UNITS IN ARRAYED WAVEGUIDE BASED WAVELENGTH DIVISION MULTIPLEXING PASSIVE OPTICAL NETWORK 有权
    基于波形波形的光网络单元的选择多波长访问多波长多普勒光网络

    公开(公告)号：US20130183039A1

    公开(公告)日：2013-07-18

    申请号：US13352956

    申请日：2012-01-18

    申请人： David Hood ,  Stefan Dahlfort

    发明人： David Hood ,  Stefan Dahlfort

    IPC分类号： H04J14/02

    CPC分类号： H04J14/0282 ,  H04J14/0234 ,  H04J14/0246 ,  H04J14/025

    摘要： An optical network unit (ONU) accesses services provided by multiple optical line terminals (OLTs) in a wavelength division multiplexing (WDM) passive optical network (PON). The ONU receives downstream signals from a first plurality of OLTs through a designated port of an arrayed waveguide (AWG). At any given time, the bandpass filter module can select any one of a first plurality of AWG cycles allocated to the first plurality of OLTs. Based on received downstream signals, the ONU transmits upstream signals to a second plurality of OLTs through the designated port of the AWG. At any given time, the bandpass filter module and a transmitter of the ONU can select any one of a second plurality of AWG cycles allocated to the second plurality of OLTs. The ONU may be configured with a plurality of receivers and transmitters, whereby it is enabled to simultaneously subscribe to a plurality of AWG cycles.

    摘要翻译： 光网络单元（ONU）访问由波分多路复用（WDM）无源光网络（PON）中的多个光线路终端（OLT）提供的服务。 ONU通过阵列波导（AWG）的指定端口从第一多个OLT接收下行信号。 在任何给定时间，带通滤波器模块可以选择分配给第一多个OLT的第一多个AWG周期中的任一个。 基于接收到的下行信号，ONU通过AWG的指定端口将上行信号发送到第二多个OLT。 在任何给定时间，带通滤波器模块和ONU的发射机可以选择分配给第二多个OLT的第二多个AWG周期中的任何一个。 ONU可以配置有多个接收机和发射机，由此能够同时订阅多个AWG周期。

    Method and apparatus for transmitting multiple channels in a wavelength division multiplexed (WDM) optical communication system with reduced raman crosstalk and nonlinear distortions
    2.
    发明授权
    Method and apparatus for transmitting multiple channels in a wavelength division multiplexed (WDM) optical communication system with reduced raman crosstalk and nonlinear distortions 有权
    在具有降低的拉曼串扰和非线性失真的波分复用（WDM）光通信系统中发送多个信道的方法和装置

    公开(公告)号：US08155524B2

    公开(公告)日：2012-04-10

    申请号：US12138977

    申请日：2008-06-13

    申请人： Jun J. Wang ,  Kerry Litvin

    发明人： Jun J. Wang ,  Kerry Litvin

    IPC分类号： H04J14/02

    CPC分类号： H04B10/506 ,  H04B10/2537 ,  H04J14/0232 ,  H04J14/0234 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0257 ,  H04J14/0282 ,  H04J14/0298

    摘要： An improved method and apparatus is provided for transmitting a WDM optical signal. The method begins by modulating optical channels that are each located at a different wavelength from one another with (1) a respective one of a plurality of information-bearing electrical signals that all embody the same broadcast information; (2) a respective one of a plurality of RF signals having a common functional broadcast waveform, at least one of the RF signals being out of phase with respect to remaining ones of the plurality of RF signal and (3) at least one of the RF signals being phase adjusted with respect to its original phase. Each of the modulated optical channels is multiplexed to form a WDM optical signal. The WDM optical signal, while maintaining the pre-assigned phase relationships between the modulation signals of the optical channels, is forwarded onto an optical transmission path.

    摘要翻译： 提供了一种用于发送WDM光信号的改进的方法和装置。 该方法开始于以下步骤：调制每个位于彼此不同波长的光信道，其中（1）全部具有相同广播信息的多个带有信息的电信号中的相应一个信号; （2）具有共同功能广播波形的多个RF信号中的相应一个，所述RF信号中的至少一个相对于所述多个RF信号中的剩余RF信号是异相的，以及（3）至少一个 RF信号相对于其原始相位进行相位调整。 每个调制光信道被复用以形成WDM光信号。 WDM光信号在保持光信道的调制信号之间的预先指定的相位关系的同时被转发到光传输路径上。

    COMMUNICATION SYSTEM COMPRISING A TUNABLE LASER
    3.
    发明申请
    COMMUNICATION SYSTEM COMPRISING A TUNABLE LASER 有权
    包含可控激光的通信系统

    公开(公告)号：US20110274439A1

    公开(公告)日：2011-11-10

    申请号：US13126087

    申请日：2009-10-13

    申请人： Gert Sarlet ,  Pierre-Jean Rigole

    发明人： Gert Sarlet ,  Pierre-Jean Rigole

    IPC分类号： H04B10/00

    CPC分类号： H04B10/07957 ,  H04B10/272 ,  H04J14/0234 ,  H04J14/0236 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0256 ,  H04J14/0282 ,  H04J14/0283

    摘要： A communication system includes a communication unit with a first part and a number of a second part, where the second part is arranged to be placed at the location of an end user, and where the first part is common for a number of second parts. The first part and the second part respectively include a laser, and each second part is connected with the first part by a fibre optic cable and a frequency filter, the first part and the relevant second part being arranged to exchange information by laser light. Each second part includes a tunable laser, the first part is arranged to analyze light received from a second part, and to transmit information to the second part while the first part is receiving light from the second part, and the information contains information for the second part that it should adjust, where required, its frequency or wavelength, and the second part thus is arranged to change its frequency or wavelength.

    摘要翻译： 通信系统包括具有第一部分和多个第二部分的通信单元，其中第二部分布置成放置在最终用户的位置，并且第一部分对于多个第二部分是共同的。 第一部分和第二部分分别包括激光器，并且每个第二部分通过光纤电缆和频率滤波器与第一部分连接，第一部分和相关的第二部分被布置成通过激光交换信息。 每个第二部分包括可调激光器，第一部分被布置成分析从第二部分接收的光，并且在第一部分正在从第二部分接收光的同时将信息发送到第二部分，并且该信息包含第二部分的信息 它应该根据需要调整其频率或波长，并且第二部分被设置为改变其频率或波长。

    Optical transmission device and optical transmission system
    4.
    发明申请
    Optical transmission device and optical transmission system 审中-公开
    光传输装置及光传输系统

    公开(公告)号：US20060228117A1

    公开(公告)日：2006-10-12

    申请号：US10554952

    申请日：2005-01-14

    申请人： Sachiko Takeuchi ,  Susumu Kirii ,  Kazuhiro Nojima

    发明人： Sachiko Takeuchi ,  Susumu Kirii ,  Kazuhiro Nojima

    IPC分类号： H04B10/04

    CPC分类号： H04J14/0282 ,  H04B10/504 ,  H04B10/505 ,  H04J14/0226 ,  H04J14/0234

    摘要： The subject of the present invention is to provide an optical transmitting device and an optical transmission system, capable of realizing an increase of multiple channels and an extension of a transmission distance at a low cost. In the present invention, the external modulation process is applied to a first optical signal (λ1), which is modulated by a transmission signal on a low frequency side for which low noise and distortion characteristics are required, out of the wideband frequency multiplexing electric signals by a first E/O converting unit (22). In contrast, the direct modulation process is applied to a second optical signal (λ2), which is modulated by a transmission signal on a high frequency side whose request for the transmission characteristic is not so high, by a second E/O converting unit (24) to execute an E/O conversion. As a result, an optical transmitting device and an optical transmission system, capable of realizing an increase of frequency range and multiple channels and an extension of a transmission distance can be manufactured at a low cost.

    摘要翻译： 本发明的主题是提供一种能够以低成本实现多个信道的增加和传输距离的扩展的光发送装置和光传输系统。 在本发明中，外部调制处理被应用于宽带频率复用电路中的由低频侧的需要低噪声和失真特性的低频侧的发送信号调制的第一光信号（λ1） 信号由第一E / O转换单元（22）发送。 相反，通过第二E / O转换单元将直接调制处理应用于由传输特性的请求不高的高频侧的发送信号调制的第二光信号（λ2） （24）执行E / O转换。 结果，可以以低成本制造能够实现频率范围和多个信道的增加以及传输距离的扩展的光发送装置和光传输系统。

    Optical cable TV system
    5.
    发明授权
    Optical cable TV system 失效
    光缆电视系统

    公开(公告)号：US5701186A

    公开(公告)日：1997-12-23

    申请号：US636901

    申请日：1996-03-29

    申请人： David R. Huber

    发明人： David R. Huber

    IPC分类号： G02B6/34 ,  H01S3/10 ,  H04B10/17 ,  H04B10/207 ,  H04H20/69 ,  H04J14/02 ,  H04N7/10 ,  H04N7/22 ,  H04N21/81

    CPC分类号： H04H20/69 ,  G02B6/2932 ,  H01S3/10023 ,  H04B10/2941 ,  H04J14/02 ,  H04J14/0206 ,  H04J14/021 ,  H04J14/0213 ,  H04J14/0234 ,  H04J14/0238 ,  H04J14/0252 ,  H04J14/028 ,  H04J14/0282 ,  H04J14/0286 ,  H04J14/0298 ,  H04N21/812 ,  H04N7/10 ,  H04N7/108 ,  H04N7/22 ,  G02B6/2935 ,  H04J14/0201 ,  H04J14/0204 ,  H04J14/0226

    摘要： An optical cable television system provides a large channel capacity and uses shared resources, whereby the more expensive hardware is shared over a large number of customers so as to minimize the cost per customer. A video switch network is provided which minimizes the temptation of subscribers to pirate signals since pay per view or on demand signals are provided only upon request of someone within a node corresponding to a neighborhood. An on demand program center continuously plays programs, such as movies, at time-staggered starts such that any subscriber will have only very minimal delays before seeing a particular program which is requested. A tuneable optical filter is provided in order to switch video signals onto an optical fiber going to the node in a particular neighborhood. An arrangement uses in-fiber grating in order to remove and insert different optical frequencies. Local insertion of various program sources, such as local commercials, is accomplished effectively by making such insertion at a relatively high point in the video distribution chain. An interface arrangement to provide on demand video signals to telephone company twisted pair wires is utilized.

    摘要翻译： 光缆电视系统提供大的信道容量并且使用共享资源，由此在大量客户上共享更昂贵的硬件，以便最小化每个客户的成本。 提供一种视频切换网络，其最小化用户对盗版信号的诱惑，因为每次观看付费或点播信号仅在对应于邻域的节点内的人的请求时提供。 按需节目中心连续播放诸如电影之类的节目，以便在查看所请求的特定节目之前，任何用户将只有非常小的延迟。 提供可调光滤波器以便将视频信号切换到去往特定邻域中的节点的光纤上。 布置使用光纤内光栅来去除和插入不同的光频率。 通过在视频分发链中相对较高的位置进行这种插入，可以有效地实现诸如本地商业广告的各种节目源的本地插入。 利用一种用于向电话公司的双绞线提供按需视频信号的接口装置。