知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

32 条记录 (耗时 0.021 秒)

    Optical frequency division multiplexing network
    6.
    发明授权
    Optical frequency division multiplexing network 失效
    光分频复用网络

    公开(公告)号：US06619865B1

    公开(公告)日：2003-09-16

    申请号：US09121591

    申请日：1998-07-24

    申请人： Atsushi Takai ,  Ryoji Takeyari ,  Akihiko Takase

    发明人： Atsushi Takai ,  Ryoji Takeyari ,  Akihiko Takase

    IPC分类号： H04J1400

    CPC分类号： H04Q11/0062 ,  H04J14/02 ,  H04J14/0201 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/0206 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0213 ,  H04Q2011/0009 ,  H04Q2011/0011 ,  H04Q2011/0013 ,  H04Q2011/0015 ,  H04Q2011/0039 ,  H04Q2011/0086

    摘要： An optical frequency division multiplexing network includes first optical communication paths connected to terminals, respectively, a second optical communication path connected to the outside and a node composed of a selection unit for selecting signals having optical frequencies to be sent to the plurality of terminals, respectively, from signals transmitted through the second optical communication path in optical frequency division multiplexing, a conversion unit for converting the selected signals into signals having a single optical frequency and an output unit for producing the converted signals to the terminals through the first optical communication paths, respectively.

    摘要翻译： 光分频复用网络包括分别连接到终端的第一光通信路径，连接到外部的第二光通信路径和由用于选择要发送到多个终端的光频信号的选择单元组成的节点 通过光分频多路复用通过第二光通信路径发送的信号，将所选择的信号转换成具有单一光频率的信号的转换单元和用于通过第一光通信路径向终端产生转换信号的输出单元， 分别。

    Optical transmitter
    8.
    发明授权
    Optical transmitter 有权

    公开(公告)号：US07099596B2

    公开(公告)日：2006-08-29

    申请号：US10319514

    申请日：2002-12-16

    申请人： Koichi Watanabe ,  Ryoji Takeyari ,  Masataka Shirai

    发明人： Koichi Watanabe ,  Ryoji Takeyari ,  Masataka Shirai

    IPC分类号： H04B10/04

    CPC分类号： H04B10/504 ,  H04B10/505

    摘要： A high-speed optical transmitter having an optical modulator and a driver circuit while maintaining optical modulator performance. The high-speed optical transmitter comprises the optical modulator which modulates and outputs an input light in accordance with an applied voltage, and a driver circuit which outputs the applied voltage into the optical modulator and has an emitter follower circuit at an output stage thereof.

    Optical single sideband transmitter
    9.
    发明授权
    Optical single sideband transmitter 失效
    光学单边带发射机

    公开(公告)号：US06850713B2

    公开(公告)日：2005-02-01

    申请号：US10320527

    申请日：2002-12-17

    申请人： Nobuhiko Kikuchi ,  Ryoji Takeyari ,  Toshiki Sugawara

    发明人： Nobuhiko Kikuchi ,  Ryoji Takeyari ,  Toshiki Sugawara

    IPC分类号： G02F1/025 ,  H04B10/516 ,  H04B10/54 ,  H04B10/61 ,  H01S3/10 ,  G02B26/00 ,  G02F1/00 ,  H04B10/12

    CPC分类号： H04B10/505 ,  H04B10/5051 ,  H04B10/5053 ,  H04B10/50572 ,  H04B10/506 ,  H04B10/508 ,  H04B2210/258 ,  H04L7/0008

    摘要： With the normal modulation method, it is difficult to construct a Hilbert transform device because it is complicated. To solve the problem, a single sideband modulated optical pulse train is generated by driving a Mach-Zehnder optical modulator for optical pulse generation with a laser source's sine wave clock signals that have been rendered 90 degrees out of phase from each other. The generated pulse train is applied to an optical modulator, modulated with an NRZ (nonreturn-to-zero) data signal, and filtered by a narrow-band optical filter to obtain one of two sidebands.

    摘要翻译： 利用正常的调制方法，由于复杂而难以构造希尔伯特变换装置。 为了解决这个问题，通过用激光源的正弦波时钟信号驱动用于光脉冲生成的马赫 - 曾德尔光学调制器来产生单个边带调制的光脉冲串，这些信号彼此相差90度。 所产生的脉冲串被施加到用NRZ（非归零）数据信号调制的光调制器，并由窄带滤光器滤波以获得两个边带之一。