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1. 发明授权

US06434288B1 Optical switching system 失效
标题翻译：光交换系统
公开(公告)号：US06434288B1
公开(公告)日：2002-08-13
申请号：US09530448
申请日：2000-06-13
申请人： Aritomo Uemura , Hiroshi Ichibangase , Takashi Mizuochi , Tadayoshi Kitayama , Shu Yamamoto , Tetsuya Miyazaki , Takatomi Kabashima , Naoki Kobayashi
发明人： Aritomo Uemura , Hiroshi Ichibangase , Takashi Mizuochi , Tadayoshi Kitayama , Shu Yamamoto , Tetsuya Miyazaki , Takatomi Kabashima , Naoki Kobayashi
IPC分类号： G02B626
CPC分类号： H04J14/0297 , H04J14/0283 , H04J14/0291 , H04J14/0294 , H04Q11/0005 , H04Q11/0062 , H04Q2011/0024 , H04Q2011/0043 , H04Q2011/0081 , H04Q2011/0092
摘要： An optical switching system is implemented by providing a transmitting section with a preparatory transmitted optical signal selector and a working transmitted optical signal splitter, which are each implemented by a 1×2 optical space switch, and by providing a receiving section with a receiving optical switch which is implemented by a 2×2 optical space switch, and with a preparatory receiving optical gate which is implemented by a 1×2 optical space switch. This makes it possible to switch between the working system and preparatory system without employing any 4×4 optical space switch, thereby implementing a practical optical switching system without causing such problems as communication interruption during maintenance or impairment of transmission path working efficiency.
摘要翻译：光交换系统是通过提供一个具有准备发送光信号选择器和工作传输光信号分离器的发射部分，每个发射部分由1x2光学空间开关实现，并且通过向接收部分提供接收光开关，该接收光开关是由2x2光学空间开关实现，并且具有由1x2光学空间开关实现的准备接收光栅。这使得可以在不使用任何4×4光学空间开关的情况下在工作系统和预备系统之间切换，从而实现实用的光交换系统，而不会导致维护期间的通信中断或传输路径工作效率的损害等问题。

2. 发明授权

US06801720B1 Optical signal quality supervisory device 失效
标题翻译：光信号质量监控装置
公开(公告)号：US06801720B1
公开(公告)日：2004-10-05
申请号：US09559644
申请日：2000-04-28
申请人： Takashi Mizuochi , Yojiro Osaki , Aritomo Uemura , Hiroshi Ichibangase , Kiwami Matsushita , Tadayoshi Kitayama , Shu Yamamoto , Tetsuya Miyazaki , Takatomi Kabashima , Naoki Kobayashi
发明人： Takashi Mizuochi , Yojiro Osaki , Aritomo Uemura , Hiroshi Ichibangase , Kiwami Matsushita , Tadayoshi Kitayama , Shu Yamamoto , Tetsuya Miyazaki , Takatomi Kabashima , Naoki Kobayashi
IPC分类号： H04B1016
CPC分类号： H04L1/20 , H04B10/0775 , H04B2210/071 , H04B2210/072 , H04B2210/078 , H04J3/14 , H04J14/02 , H04J14/0227 , H04J14/0245 , H04J14/0249 , H04J14/0283 , H04J2203/0057
摘要： The present invention has an object to obtain an optical signal quality supervisory device that supervises the quality of an optical signal simply, efficiently and with high accuracy without inviting an increase in cost, an increase in circuit scale and increase in power consumption. The bit rate of the optical supervisory channel is made lower than the bit rate of the optical main channel that is transmitted over an optical communication system, but the reception electric band width of a receiver that receives the optical supervisory channel is made equal to or wider than the reception electric band width of a receiver that receives the optical main channel. Also, the optical supervisory channel is made up of an SOH (section over head) frame to detect an error of the BIP (bit interleaved parity) byte of SOH, thereby supervising the quality of the optical communication system, in particular, the light wave network.
摘要翻译：本发明的目的是获得一种光信号质量监控装置，其能够简单，有效且高精度地监视光信号的质量，而不会增加成本，增加电路规模和增加功耗。使光监视信道的比特率低于通过光通信系统发送的光主干的比特率，但接收光监控信道的接收机的接收电带宽度等于或大于比接收光学主通道的接收机的接收电带宽度大。此外，光监控信道由SOH（部分头）帧构成，以检测SOH的BIP（比特交织奇偶校验）字节的错误，从而监督光通信系统的质量，特别是光波网络。

3. 发明授权

US6028695A Optical modulating apparatus 失效
标题翻译：光调制装置
公开(公告)号：US6028695A
公开(公告)日：2000-02-22
申请号：US124993
申请日：1998-07-30
申请人： Aritomo Uemura , Takashi Mizuochi , Katsuhiro Shimizu , Kiwami Matsushita , Tadayoshi Kitayama , Masatoshi Suzuki , Hidenori Taga , Shu Yamamoto
发明人： Aritomo Uemura , Takashi Mizuochi , Katsuhiro Shimizu , Kiwami Matsushita , Tadayoshi Kitayama , Masatoshi Suzuki , Hidenori Taga , Shu Yamamoto
IPC分类号： G02F1/03 , H04B10/07 , H04B10/516 , H04B10/54 , H04B10/548 , H04B10/58 , H04B10/61 , G02F1/035 , G02F1/055
CPC分类号： G02F1/0327 , G02F2203/25
摘要： When an intensity modulating operation and a phase modulating operation are carried out by employing a 2-electrode MachZehnder type optical modulator preferably a LN-MZ type optical modulator, a drive signal of this 2-electrode LN-MZ type optical modulator is produced from an intensity modulation signal and a phase modulation signal with a low loss and a simple arrangement. A optical modulating apparatus includes a splitter/combiner structured to split an intensity modulation signal inputted into a first input terminal into a first electric signal having an in-phase relationship with that of the intensity modulation signal and second electric signal having an inverse phase relationship therewith, split a phase modulation signal inputted into a second input terminal into a third electric signal having an in-phase relationship with that of the phase modulation signal an also a fourth electric signal having an in-phase relationship therewith, combine the first electric signal with the fourth electric signal to thereby output a first combined signal, and combine the second electric signal with the third electric signal to thereby output a second combined signal; and an optical modulating means structured to split a light carrier wave entered from a light source into two light carrier waves, and to optically modulate the two sets of the split light carrier waves by using the first combined signal and the second combined signal derived from the splitter/combiner, and combine the two phase-modulated above said light carrier waves to output an optical modulation signal.
摘要翻译：当通过使用优选为LN-MZ型光调制器的2电极MachZehnder型光学调制器进行强度调制操作和相位调制操作时，该2电极LN-MZ型光调制器的驱动信号由强度调制信号和具有低损耗和简单布置的相位调制信号。光调制装置包括：分离器/组合器，被构造成将输入到第一输入端的强度调制信号分成与强度调制信号的同相关系的第一电信号和与其相反的相位关系的第二电信号将输入到第二输入端子的相位调制信号分别成为与相位调制信号同相的同步关系的第三电信号，以及与其同相关系的第四电信号，将第一电信号与第四电信号，从而输出第一组合信号，并将第二电信号与第三电信号组合，从而输出第二组合信号; 以及光调制装置，被构造成将从光源进入的光载波分成两个光载波，并且通过使用从第二组合信号导出的第一组合信号和第二组合信号对两组分裂光载波进行光学调制分离器/组合器，并且组合在所述轻载波上的两个相位调制以输出光调制信号。

4. 发明授权

US06445478B1 Optical pulse position detecting circuit and an optical pulse generating apparatus and their methods 有权
公开(公告)号：US06445478B1
公开(公告)日：2002-09-03
申请号：US09764271
申请日：2001-01-19
申请人： Katsuhiro Shimizu , Takashi Mizuochi , Takeshi Komiya , Kiwami Matsushita , Tadayoshi Kitayama , Masatoshi Suzuki , Hidenori Taga , Shu Yamamoto , Noboru Edagawa , Itsuro Morita
发明人： Katsuhiro Shimizu , Takashi Mizuochi , Takeshi Komiya , Kiwami Matsushita , Tadayoshi Kitayama , Masatoshi Suzuki , Hidenori Taga , Shu Yamamoto , Noboru Edagawa , Itsuro Morita
IPC分类号： H04B1004
摘要： Detection of an optical pulse position uses an optical pulse string with a determined repetitive ratio and an electric clock signal with a same frequency as the repetitive ratio of the optical pulse string. A phase of the electric clock signal oscillator is shifted and supplied to an optical modulator. The optical modulator modulates the optical pulse string based on the electric clock signal and outputs a modulated optical signal. A photo detector converts the modulated optical signal output from the optical modulator to an electric signal. The phase shift amount of the electric clock signal is controlled to maximize an output from the photo detector. Additionally, a dither signal may be used in the control of the phase shift, more than the optical modulator may be employed, and/or more than color light source may be employed. The use of at least one of feed forward and feedback control provided by maximizing an output of the photo detector allows an optical pulse having a short width to be realized.

5. 发明授权

US06236488B1 Optical pulse position detecting circuit and an optical pulse generating apparatus and their methods 失效
标题翻译：光脉冲位置检测电路及光脉冲发生装置及其方法
公开(公告)号：US06236488B1
公开(公告)日：2001-05-22
申请号：US09052072
申请日：1998-03-31
申请人： Katsuhiro Shimizu , Takashi Mizuochi , Takeshi Komiya , Kiwami Matsushita , Tadayoshi Kitayama , Masatoshi Suzuki , Hidenori Taga , Shu Yamamoto , Noboru Edagawa , Itsuro Morita
发明人： Katsuhiro Shimizu , Takashi Mizuochi , Takeshi Komiya , Kiwami Matsushita , Tadayoshi Kitayama , Masatoshi Suzuki , Hidenori Taga , Shu Yamamoto , Noboru Edagawa , Itsuro Morita
IPC分类号： H04B1004
CPC分类号： G02F1/0327 , G01J11/00 , G02F2203/26 , H04J14/08
摘要： Detection of an optical pulse position uses an optical pulse string with a determined repetitive ratio and an electric clock signal with a same frequency as the repetitive ratio of the optical pulse string. A phase of the electric clock signal oscillator is shifted and supplied to an optical modulator. The optical modulator modulates the optical pulse string based on the electric clock signal and outputs a modulated optical signal. A photo detector converts the modulated optical signal output from the optical modulator to an electric signal. The phase shift amount of the electric clock signal is controlled to maximize an output from the photo detector. Additionally, a dither signal may be used in the control of the phase shift, more than the optical modulator may be employed, and/or more than color light source may be employed. The use of at least one of feed forward and feedback control provided by maximizing an output of the photo detector allows an optical pulse having a short width to be realized.
摘要翻译：光脉冲位置的检测使用具有确定的重复比率的光脉冲串和具有与光脉冲串的重复比相同频率的电时钟信号。电时钟信号振荡器的相位移位并提供给光调制器。光调制器基于电时钟信号调制光脉冲串，并输出调制光信号。光检测器将从光调制器输出的调制光信号转换为电信号。控制电时钟信号的相移量使光检测器的输出最大化。另外，抖动信号可以用于相移的控制，可以采用多于光调制器，和/或多于彩色光源。使用通过使光检测器的输出最大化而提供的前馈和反馈控制中的至少一个允许实现具有短宽度的光脉冲。

6. 发明授权

US06867908B2 Optical amplifier having various control circuitry 有权
标题翻译：具有各种控制电路的光放大器
公开(公告)号：US06867908B2
公开(公告)日：2005-03-15
申请号：US10401748
申请日：2003-03-31
申请人： Aritomo Uemura , Kiwami Matsushita , Yukio Horiuchi , Masatoshi Suzuki , Noboru Edagawa , Shu Yamamoto , Shigeyuki Akiba
发明人： Aritomo Uemura , Kiwami Matsushita , Yukio Horiuchi , Masatoshi Suzuki , Noboru Edagawa , Shu Yamamoto , Shigeyuki Akiba
IPC分类号： H03F3/08 , H04B3/36 , H04B10/03 , H04B10/079 , H04B10/29 , H04B10/293 , H04B10/80 , H01S3/00
CPC分类号： H04B10/29 , H04B10/2918 , H04B10/808
摘要： The optical amplifier according to the present invention is constructed such that the amount of the electric current fed to the power feeding line 2a is first detected by the current detection means, and then a setting signal is generated to each of the bypass circuits 22 and 23 in accordance with the thus detected amount of the fed current, and thereafter the output level of each of the optical repeater circuits 11 and 12 is controlled respectively by the bypass circuits 22 and 23, so that the output level of these repeater circuits 11 and 12 can be controlled in accordance with the amount of the current fed to the power feeding line 2a.
摘要翻译：根据本发明的光放大器被构造成使得通过电流检测装置首先检测馈送到馈电线2a的电流量，然后对每个旁路电路22和23产生设置信号根据这样检测到的馈电电流量，然后分别由旁路电路22和23控制每个光中继器电路11和12的输出电平，使得这些中继器电路11和12的输出电平可以根据馈送到馈电线2a的电流量进行控制。

7. 发明授权

US06614588B1 Optical amplifier having various control circuitry 有权
公开(公告)号：US06614588B1
公开(公告)日：2003-09-02
申请号：US09725288
申请日：2000-11-29
申请人： Aritomo Uemura , Kiwami Matsushita , Yukio Horiuchi , Masatoshi Suzuki , Noboru Edagawa , Shu Yamamoto , Shigeyuki Akiba
发明人： Aritomo Uemura , Kiwami Matsushita , Yukio Horiuchi , Masatoshi Suzuki , Noboru Edagawa , Shu Yamamoto , Shigeyuki Akiba
IPC分类号： H01S300
CPC分类号： H04B10/29 , H04B10/2918 , H04B10/808
摘要： The optical amplifier according to the present invention is constructed such that the amount of the electric current fed to the power feeding line 2a is first detected by the current detection means, and then a setting signal is generated to each of the bypass circuits 22 and 23 in accordance with the thus detected amount of the fed current, and thereafter the output level of each of the optical repeater circuits 11 and 12 is controlled respectively by the bypass circuits 22 and 23, so that the output level of these repeater circuits 11 and 12 can be controlled in accordance with the amount of the current fed to the power feeding line 2a.

8. 发明授权

US5710660A Gain-controllable optical amplifier and optical gain-control method 失效
标题翻译：增益可控光放大器和光增益控制方法
公开(公告)号：US5710660A
公开(公告)日：1998-01-20
申请号：US606653
申请日：1996-02-26
申请人： Shu Yamamoto , Hidenori Taga , Noboru Edagawa , Shigeyuki Akiba , Kuniaki Motoshima , Katsumi Takano , Tadayoshi Kitayama
发明人： Shu Yamamoto , Hidenori Taga , Noboru Edagawa , Shigeyuki Akiba , Kuniaki Motoshima , Katsumi Takano , Tadayoshi Kitayama
IPC分类号： G02F1/35 , H01S3/06 , H01S3/067 , H01S3/07 , H01S3/13 , H01S3/131 , H01S3/00 , C02B6/00
CPC分类号： H04B10/2931 , H01S3/06758 , H01S3/1301
摘要： This invention provides an optical amplifier which has low noise characteristics for a wide range of input signal electric power. The optical amplifier has a plurality of cascaded optical amplifying units, a signal level detector, and a pump-source controller. The pump-source controller changes controlling objects from a pump-source corresponding to a first one of the optical amplifying units to a pump-source corresponding to a second one of the optical amplifying units according to a detection level of the signal level detector from a low level to a high level. When the detection level is outside of a control object range, the optical amplifier controls an output from the pump-source to stabilize. When the detection level is within the control object range, the optical amplifier controls an output from a pump-source of each of optical amplifying units according to the detection level.
摘要翻译：本发明提供一种对于宽范围的输入信号电力具有低噪声特性的光放大器。光放大器具有多个级联的光放大单元，信号电平检测器和泵源控制器。泵源控制器根据来自信号电平检测器的检测电平，将对应于第一光放大单元的泵浦源的控制对象改变为对应于第二光放大单元的泵浦源低水平到高水平。当检测电平超出控制对象范围时，光放大器控制泵源的输出稳定。当检测水平处于控制对象范围内时，光放大器根据检测水平控制每个光放大单元的泵浦源的输出。

9. 发明授权

US06782201B2 Four fiber ring network optical switching circuit using branched inputs 失效
标题翻译：四光纤环网光交换电路采用分支输入
公开(公告)号：US06782201B2
公开(公告)日：2004-08-24
申请号：US09731587
申请日：2000-12-07
申请人： Shu Yamamoto , Tetsuya Miyazaki , Yasuyuki Nagao , Tomohiro Otani
发明人： Shu Yamamoto , Tetsuya Miyazaki , Yasuyuki Nagao , Tomohiro Otani
IPC分类号： H04B1008
CPC分类号： H04J14/0291 , H04J14/0283 , H04Q2011/0058 , H04Q2011/0081
摘要： A four fiber ring network optical switching circuit capable of realizing the bridge function at times of the span switching and the ring switching economically by a very compact structure is disclosed. A four fiber ring network optical switching circuit is formed by a 10×8 optical matrix switch having ten input ports and eight output ports, and two branching elements adapted to branch each one of two optical signals among eight optical signals that are inputs of the four fiber ring network optical switching circuit, into two identical optical signals, and to enter the two identical optical signals into two input ports of the 10×8 optical matrix switch such that the eight optical signals are entered into the ten input ports of the 10×8 optical matrix switch as ten optical signals.
摘要翻译：公开了一种能够通过非常紧凑的结构经济地实现跨度切换时的桥接功能和环形开关的四光纤环网光交换电路。四光纤环网光交换电路由具有十个输入端口和八个输出端口的10×8光矩阵开关形成，并且两个分支元件适合于在作为四个光纤环的输入的八个光信号之中分支两个光信号中的每一个网络光交换电路分成两个相同的光信号，并将两个相同的光信号输入到10x8光矩阵开关的两个输入端口，使得八个光信号进入10x8光矩阵开关的十个输入端口，为十光信号。

10. 发明授权

US06317534B1 Optical wavelength routing device 失效
标题翻译：光波长路由设备
公开(公告)号：US06317534B1
公开(公告)日：2001-11-13
申请号：US09215225
申请日：1998-12-18
申请人： Tetsuya Miyazaki , Shu Yamamoto , Koichi Maru , Hisato Uetsuka
发明人： Tetsuya Miyazaki , Shu Yamamoto , Koichi Maru , Hisato Uetsuka
IPC分类号： G02B628
CPC分类号： G02B6/12011
摘要： An optical wavelength routing device comprises an arrayed waveguide comprising a plurality of channel waveguides formed on a substrate, a plurality of input waveguides having 12 input ports located on an input side of the arrayed waveguide, a plurality of output waveguides having 16 input ports located on an output side of the arrayed waveguide, an input slab waveguide for coupling the plurality of input waveguides to the arrayed waveguide to provide a first coupling portion on the side of the input waveguide, and an output slab waveguide for coupling the arrayed waveguide to the plurality of output waveguides to provide a second coupling portion on the side of the output waveguide, in which central wavelengths of lights input to the input ports and output from the output ports are controlled such that a difference between a predetermined wavelength and a central wavelength is suppressed within the range of +&dgr;&lgr;/4. By this structure, a maximum central wavelength difference can be suppressed at minimum.
摘要翻译：光波长路由设备包括阵列波导，其包括形成在衬底上的多个通道波导，多个输入波导，其具有位于阵列波导的输入侧上的12个输入端口，多个输出波导具有位于阵列波导的输出侧，用于将多个输入波导耦合到阵列波导的输入平板波导，以在输入波导侧提供第一耦合部分，以及用于将阵列波导耦合到多个波导的输出平板波导的输出波导，以在输出波导侧提供第二耦合部分，其中输入到输入端口的光的中心波长和从输出端口输出被控制，使得预定波长和中心波长之间的差被抑制在+ deltalambd / 4的范围内。通过这种结构，最大限度地抑制最大中心波长差。

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