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40 条记录 (耗时 0.048 秒)

    Optical one-to-one protection switching apparatus
    2.
    发明授权
    Optical one-to-one protection switching apparatus 失效
    光一对一保护倒换装置

    公开(公告)号：US06975811B1

    公开(公告)日：2005-12-13

    申请号：US09650506

    申请日：2000-08-29

    申请人： Sunao Kakizaki ,  Hideaki Tsushima ,  Takashi Mori ,  Masahiro Takatori ,  Yukio Hayashi ,  Shinichi Kuwano

    发明人： Sunao Kakizaki ,  Hideaki Tsushima ,  Takashi Mori ,  Masahiro Takatori ,  Yukio Hayashi ,  Shinichi Kuwano

    IPC分类号： H04B10/03 ,  H04B10/07 ,  H04B10/077 ,  H04L1/22 ,  H04Q11/00 ,  H04B10/00

    CPC分类号： H04Q11/0062 ,  H04Q2011/0043 ,  H04Q2011/0081

    摘要： An optical one-to-one protection switching apparatus exchanges signals between a transmit node and a receive node. If a fault is detected in the first transmission line (down-stream), a controller in the node controls a drive circuit so as to shut off a gate. Then, the controller in the transmit node upon receiving a switching request from the receive node, controls the drive circuit so as to shut off the gate. Thereby, the optical switch is switched. The transmitter of the client terminal is thus connected to the second transmission line (down-stream). Upon receiving the switching request from the transmit node, the optical switch in the receive node is switched. Thereby the receiver in the client terminal is connected to the second transmission line (down-stream).

    摘要翻译： 光学一对一保护倒换装置在发射节点和接收节点之间交换信号。 如果在第一传输线（下行）中检测到故障，节点中的控制器控制驱动电路以便关闭门。 然后，当从接收节点接收到切换请求时，发送节点中的控制器控制驱动电路以关闭门。 由此，切换光开关。 因此，客户终端的发射机连接到第二传输线（下行）。 在从发送节点接收到切换请求时，切换接收节点中的光开关。 因此，客户终端中的接收机连接到第二传输线（下行）。

    Homodyne optical receiver equipment
    4.
    发明授权
    Homodyne optical receiver equipment 失效
    零差光接收机设备

    公开(公告)号：US5323258A

    公开(公告)日：1994-06-21

    申请号：US771444

    申请日：1991-10-04

    申请人： Hideaki Tsushima ,  Ryoji Takeyari ,  Shinya Sasaki ,  Shigeki Kitajima ,  Katsuhiko Kuboki

    发明人： Hideaki Tsushima ,  Ryoji Takeyari ,  Shinya Sasaki ,  Shigeki Kitajima ,  Katsuhiko Kuboki

    IPC分类号： H04B10/516 ,  H04B10/07 ,  H04B10/61 ,  H04B10/06

    CPC分类号： H04B10/61 ,  H04B10/614 ,  H04B10/63

    摘要： A homodyne optical receiver includes a polarization beam splitter for dividing an optical signal into an optical signal with horizontal polarization and an optical signal with vertical polarization. Optical couplers combine two optical signals of the two polarized components with two optical local signals, which signals are almost matched therewith in polarization, and in a state where they are matched with each other in phase. Detectors homodyne-detect respective output optical signals of the optical couplers and two weighting circuits assign output signals of the detectors weights which are approximately proportional to amplitudes thereof, respectively. An adder adds output signals of the weighting circuits.

    摘要翻译： 零差光接收机包括用于将光信号分解为具有水平偏振的光信号和具有垂直偏振的光信号的偏振分束器。 光耦合器将两个偏振分量的两个光信号与两个光学本地信号组合，这些信号在偏振中几乎匹配，并且在相位相互匹配的状态下。 检测器零差检测光耦合器的相应输出光信号，并且两个加权电路分别分配与其幅度近似成比例的检测器权重的输出信号。 加法器加上加权电路的输出信号。

    Optical tuning method and apparatus suitable for selective reception of optical frequency division multiplex signals
    5.
    发明授权
    Optical tuning method and apparatus suitable for selective reception of optical frequency division multiplex signals 失效
    适用于选择性接收光分频复用信号的光调谐方法和装置

    公开(公告)号：US5144467A

    公开(公告)日：1992-09-01

    申请号：US557721

    申请日：1990-07-25

    申请人： Shigeki Kitajima ,  Kiichi Yamashita ,  Shinya Sasaki ,  Hideaki Tsushima

    发明人： Shigeki Kitajima ,  Kiichi Yamashita ,  Shinya Sasaki ,  Hideaki Tsushima

    IPC分类号： G02F2/00 ,  G02F2/02 ,  H04B10/07 ,  H04B10/516 ,  H04B10/54 ,  H04B10/548 ,  H04B10/564 ,  H04B10/572 ,  H04B10/61 ,  H04J14/00 ,  H04J14/02

    CPC分类号： H04B10/60 ,  H04B10/64 ,  H04J14/02

    摘要： An optical tuning device including a channel designator and an intermediate frequency stabilizer for stabilizing the frequency of a difference signal corresponding to the frequency difference between a transmitted optical signal and a local oscillation optical signal. The channel designator includes a bias control circuit for continuously changing the optical frequency of a local oscillation light source up to a frequency corresponding to a target channel, a channel detection circuit for detecting channel passage on the basis of the difference signal, and a channel counting circuit for storing therein the selected channel and the target channel, detecting the direction of the target channel, counting the number of channel passage times, and detecting arrival at the target channel.

    摘要翻译： 一种光调谐装置，包括通道指示器和中频稳定器，用于稳定对应于所发射的光信号和本地振荡光信号之间的频差的差信号的频率。 通道指示器包括用于连续地将本地振荡光源的光频率改变到对应于目标通道的频率的偏置控制电路，用于基于差分信号检测通道通道的通道检测电路，以及通道计数 用于在其中存储所选择的信道和目标信道的电路，检测目标信道的方向，计数信道通过时间的数量，以及检测目标信道的到达。

    Optical frequency division multiplexing transmission system
    6.
    发明授权
    Optical frequency division multiplexing transmission system 失效
    光分频复用传输系统

    公开(公告)号：US5408349A

    公开(公告)日：1995-04-18

    申请号：US907502

    申请日：1992-07-01

    申请人： Hideaki Tsushima ,  Shinya Sasaki ,  Katsuhiko Kuboki

    发明人： Hideaki Tsushima ,  Shinya Sasaki ,  Katsuhiko Kuboki

    IPC分类号： H04B10/50 ,  H04B10/508 ,  H04B10/572 ,  H04J14/02 ,  H04B10/04 ,  H04B10/06

    CPC分类号： H04B10/572 ,  H04B10/50 ,  H04B10/506 ,  H04B10/508

    摘要： An optical frequency division multiplexing transmission system for sending a large volume of information by a single optical fiber is disclosed. Each of an optical frequency division multiplexing transmitter equipment and an optical frequency division multiplexing receiver equipment has an optical filter having a periodic optical transmission characteristic therein. Each optical filter is stabilized with an absolutely-stabilized standard optical frequency. Each optical signal frequency is stabilized to a periodic transmission characteristic of the optical filter arranged in the optical frequency division multiplexing transmitter equipment, and each local frequency to a periodic transmission characteristic of the optical filter arranged in the optical frequency division multiplexing receiver equipment. Even in the case where no optical signal is applied to the optical frequency division multiplexing receiver equipment due to such causes as a fault of the transmission optical source or the breakage of an optical fiber, the local optical source frequency continues to be controlled in stable fashion.

    摘要翻译： 公开了一种用于通过单个光纤发送大量信息的光分频复用传输系统。 光分频复用发射机设备和光分频多路复用接收机设备中的每一个具有其中具有周期性光传输特性的滤光器。 每个滤光片均采用绝对稳定的标准光学频率进行稳定。 每个光信号频率被稳定为布置在光分频复用发射机设备中的光滤波器的周期性传输特性，并且每个本地频率被布置在光分频多路复用接收机设备中的滤波器的周期性传输特性。 即使在由于传输光源的故障或光纤的断裂等原因而不对光分频多路复用接收机设备施加光信号的情况下，本地光源频率继续以稳定的方式被控制 。

    Optical transmitter, optical receiver and optical transmission apparatus and control method of optical receiver
    9.
    发明授权
    Optical transmitter, optical receiver and optical transmission apparatus and control method of optical receiver 失效
    光发射机，光接收机和光传输装置及光接收机的控制方法

    公开(公告)号：US5274490A

    公开(公告)日：1993-12-28

    申请号：US693584

    申请日：1991-04-30

    申请人： Hideaki Tsushima ,  Shinya Sasaki

    发明人： Hideaki Tsushima ,  Shinya Sasaki

    IPC分类号： H04B10/142 ,  H04L25/49 ,  H04L27/10 ,  H04B10/04 ,  H04B10/06

    CPC分类号： H04L25/4925 ,  H04B10/614 ,  H04L27/10

    摘要： A unipolar original electrical signal is encoded by alternate mark inversion and combined with a DC bias current for injection of a semiconductor laser to produce a bipolar FSK optical signal that is transmitted to a receiver. At the receiver, the received signal is coupled with optical local power and fed to an optical/electrical transducer, preferably a semiconductor, to produce an electrical signal that is demodulated to produce the original unipolar signal. The demodulator may be of different types, for example employing delaying part of the amplified electrical signal and mixing the delayed part with the original signal for passage of the combined signal through a low pass filter; with proper selection of the delay, an AMI decoder is not needed. The demodulator may also be of the type that has one or more band pass filters to respectively separate the positive mark, space and negative mark signals that may thereafter be added. Filtering and polarization beam splitting may also be used in the demodulator for improving the signal-to-noise ratio and preventing other types of degradation.

    摘要翻译： 单极原始电信号通过交替标记反转编码，并与用于注入半导体激光器的DC偏置电流组合以产生传输到接收器的双极性FSK光信号。 在接收机处，所接收的信号与光学局部功率耦合，并被馈送到光/电换能器，优选地是半导体，以产生被解调以产生原始单极性信号的电信号。 解调器可以是不同类型的，例如采用延迟部分放大的电信号，并将延迟部分与原始信号混合，以使组合信号通过低通滤波器; 通过适当选择延迟，不需要AMI解码器。 解调器也可以是具有一个或多个带通滤波器的类型，以分别分离随后可能被添加的正标记，空格和负标记信号。 滤波和偏振光束分离也可用于解调器中以改善信噪比并防止其它类型的降级。

    Optical transmitter, optical receiver and optical transmission apparatus and control method of optical receiver
    10.
    发明授权
    Optical transmitter, optical receiver and optical transmission apparatus and control method of optical receiver 失效
    光发射机，光接收机和光传输装置及光接收机的控制方法

    公开(公告)号：US5023950A

    公开(公告)日：1991-06-11

    申请号：US298946

    申请日：1989-01-19

    申请人： Hideaki Tsushima ,  Shinya Sasaki

    发明人： Hideaki Tsushima ,  Shinya Sasaki

    IPC分类号： G02F2/00 ,  H01S5/06 ,  H04B10/07 ,  H04B10/40 ,  H04B10/50 ,  H04B10/516 ,  H04B10/548 ,  H04B10/60 ,  H04B10/61 ,  H04B10/64 ,  H04L25/49 ,  H04L27/10

    CPC分类号： H04L25/4925 ,  H04B10/614 ,  H04L27/10

    摘要： A unipolar original electrical signal is encoded by alternate mark inversion and combined with a DC bias current for injection of a semiconductor laser to produce a bipolar FSK optical signal that is transmitted to a receiver. At the receiver, the received signal is coupled with optical local power and fed to an optical/electrical transducer, preferably a semiconductor, to produce an electrical signal that is demodulated to produce the original unipolar signal. The demodulator may be of different types, for example employing delaying part of the amplified electrical signal and mixing the delayed part with the original signal for passage of the combined signal through a low pass filter; with proper selection of the delay, an AMI decoder is not needed. The demodulator may also be of the type that has one or more band pass filters to respectively separate the positive mark, space and negative mark signals that may thereafter be added. Filtering and polarization beam splitting may also be used in the demodulator for improving the signal-to-noise ratio and preventing other types of degradation.