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    Homodyne optical receiver equipment
    1.
    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 frequency division multiplexing transmission system
    3.
    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 tuning method and apparatus suitable for selective reception of optical frequency division multiplex signals
    4.
    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 transmission apparatus and optical systems
    6.
    发明授权
    Optical transmission apparatus and optical systems 失效
    光传输设备和光学系统

    公开(公告)号：US06424445B1

    公开(公告)日：2002-07-23

    申请号：US09025331

    申请日：1998-02-18

    申请人： Hideaki Tsushima ,  Shigeki Kitajima ,  Yasushi Sawada

    发明人： Hideaki Tsushima ,  Shigeki Kitajima ,  Yasushi Sawada

    IPC分类号： H04J1402

    CPC分类号： H04B10/0731 ,  H01S3/10015 ,  H01S3/1301 ,  H04Q11/0001 ,  H04Q11/0005 ,  H04Q11/0062 ,  H04Q2011/0039 ,  H04Q2011/0049 ,  H04Q2011/0069 ,  H04Q2011/0083

    摘要： An optical transmission apparatus, an optical repeater using the optical transmission apparatus, and an optical cross-connect equipment for controlling switches depending on supervisory information, comprising: a doped fiber for amplifying an optical signal of wavelength &lgr;d; a wavelength multiplexer for outputting a pumping light to the doped fiber; a wavelength multiplexer for multiplexing an amplified optical signal and a supervisory optical signal to as to output it to an optical fiber at downstream side; a pumping and supervisory light source; an optical coupler for distributing the light from the light source at a ratio of N:1 to the wavelength multiplexers; and a driver for controlling the light source by adding the supervisory information and a direct current signal.

    摘要翻译： 一种光传输装置，使用该光传输装置的光中继器，以及根据监控信息控制开关的光交叉连接设备，包括：用于放大波长lambdd的光信号的掺杂光纤; 波长多路复用器，用于向掺杂光纤输出泵浦光; 波长多路复用器，用于将放大的光信号和监控光信号复用成将其输出到下游侧的光纤; 泵浦和监控光源; 光耦合器，用于将来自光源的光以N:1的比率分配给波长多路复用器; 以及通过添加监视信息和直流信号来控制光源的驱动器。

    Optical transmission apparatus and optical systems
    8.
    发明授权
    Optical transmission apparatus and optical systems 失效
    光传输设备和光学系统

    公开(公告)号：US06731874B2

    公开(公告)日：2004-05-04

    申请号：US10172811

    申请日：2002-06-14

    申请人： Hideaki Tsushima ,  Shigeki Kitajima ,  Yasushi Sawada

    发明人： Hideaki Tsushima ,  Shigeki Kitajima ,  Yasushi Sawada

    IPC分类号： H04B1008

    CPC分类号： H04B10/0731 ,  H01S3/10015 ,  H01S3/1301 ,  H04Q11/0001 ,  H04Q11/0005 ,  H04Q11/0062 ,  H04Q2011/0039 ,  H04Q2011/0049 ,  H04Q2011/0069 ,  H04Q2011/0083

    摘要： An optical transmission apparatus, an optical repeater using the optical transmission apparatus, and an optical cross-connect equipment for controlling switches depending on supervisory information, comprising: a doped fiber for amplifying an optical signal of wavelength Od; a wavelength multiplexer for outputting a pumping light to the doped fiber; a wavelength multiplexer for multiplexing an amplified optical signal and a supervisory optical signal to as to output it to an optical fiber at downstream side; a pumping and supervisory light source; an optical coupler for distributing the light from the light source at a ratio of N:1 to the wavelength multiplexers; and a driver for controlling the light source by adding the supervisory information and a direct current signal.

    摘要翻译： 光传输装置，使用该光传输装置的光中继器，以及根据监控信息控制开关的光交叉连接设备，包括：用于放大波长为λ的光信号的掺杂光纤; 波长多路复用器，用于向掺杂光纤输出泵浦光; 用于将放大的光信号和监视光信号复用以将其输出到下游侧的光纤的波长多路复用器; 泵浦和监控光源; 光耦合器，用于将来自光源的光以N:1的比率分配给波长多路复用器; 以及通过添加监视信息和直流信号来控制光源的驱动器。