公开(公告)号：US07280470B2

公开(公告)日：2007-10-09

申请号：US10654222

申请日：2003-09-03

申请人： Tatsuya Shiragaki ,  Naoya Henmi ,  Makoto Nishio ,  Hitoshi Takeshita ,  Hirofumi Shimomura

发明人： Tatsuya Shiragaki ,  Naoya Henmi ,  Makoto Nishio ,  Hitoshi Takeshita ,  Hirofumi Shimomura

IPC分类号： H04J3/04 ,  H04J14/00 ,  G01R31/08 ,  G02F1/00 ,  H04B10/08

CPC分类号： H04J14/0283 ,  H04J14/0206 ,  H04J14/0212 ,  H04J14/0295 ,  H04J14/0297

摘要： Multiple working paths are established on each working rings and multiple protection paths are established on each of multiple protection rings. A working path on a first working ring spans across first and second nodes for signal transmission in a first direction of the ring, and a working path on a second working ring spans across the first and second nodes for signal transmission in a second, opposite direction of the ring. A protection path on a first protection ring spans across the first and second nodes for signal transmission in said second direction, and a protection path on a second protection ring spans across the first and second nodes for signal transmission in said first direction. The first and second nodes normally use the working paths, respectively. When one of the working paths fails, the first and second nodes use a corresponding protection path.

摘要翻译： 在每个工作环上建立多个工作路径，并在多个保护环中的每一个上建立多个保护路径。 第一工作环上的工作路径横跨第一和第二节点，用于在环的第一方向上进行信号传输，并且第二工作环上的工作路径跨越第一和第二节点跨过第二和相反方向进行信号传输 的戒指 第一保护环上的保护路径穿过第一和第二节点，用于在所述第二方向上进行信号传输，并且第二保护环上的保护路径横跨第一和第二节点跨过所述第一方向进行信号传输。 第一和第二节点通常分别使用工作路径。 当其中一个工作路径发生故障时，第一个和第二个节点使用相应的保护路径。

公开(公告)号：US06657952B1

公开(公告)日：2003-12-02

申请号：US09200583

申请日：1998-11-27

申请人： Tatsuya Shiragaki ,  Naoya Henmi ,  Makoto Nishio ,  Hitoshi Takeshita ,  Hirofumi Shimomura

发明人： Tatsuya Shiragaki ,  Naoya Henmi ,  Makoto Nishio ,  Hitoshi Takeshita ,  Hirofumi Shimomura

IPC分类号： G01R3108

CPC分类号： H04J14/0283 ,  H04J14/0206 ,  H04J14/0212 ,  H04J14/0295 ,  H04J14/0297

摘要： In a ring topology network, a number of nodes interconnect transmission links to form first and second working rings and first and second optical protection rings in a ring topology. Multiple working paths are established on each working ring and multiple protection paths are established on each protection ring corresponding to the working paths. A first working path spans across first and second nodes for transmission of a signal in a first direction of the ring topology, and a second working path of the second working rings spans across the first and second nodes for transmission of a signal in a second direction of the ring topology opposite to the first direction. A first protection path on the first protection ring spans across the first and second nodes for transmission of a signal in the second direction of the ring topology, and a second protection path of the second protection ring spans across the first and second nodes for transmission of a signal in the first direction of the ring topology. The first and second nodes normally use the first and second working paths, respectively. Responsive to a failure of one of the first and second working paths, the first and second nodes use a corresponding one of the first and second protection paths, instead of the failed working path.

摘要翻译： 在环形拓扑网络中，多个节点互连传输链路以形成环形拓扑中的第一和第二工作环以及第一和第二光学保护环。 在每个工作环上建立多个工作路径，并在与工作路径对应的每个保护环上建立多条保护路径。 第一工作路径横跨第一和第二节点，用于在环形拓扑的第一方向传输信号，并且第二工作环的第二工作路径横跨第一和第二节点跨过第二方向传输信号 的环形拓扑与第一个方向相反。 第一保护环上的第一保护路径穿过第一和第二节点，用于在环形拓扑的第二方向上传输信号，并且第二保护环的第二保护路径跨过第一和第二节点传输 环形拓扑的第一个方向的信号。 第一和第二节点通常分别使用第一和第二工作路径。 响应于第一和第二工作路径之一的故障，第一和第二节点使用第一和第二保护路径中的对应的一个，而不是故障工作路径。

公开(公告)号：US06538779B1

公开(公告)日：2003-03-25

申请号：US09332930

申请日：1999-06-14

申请人： Hitoshi Takeshita ,  Hirofumi Shimomura ,  Tatsuya Shiragaki ,  Naoya Henmi

发明人： Hitoshi Takeshita ,  Hirofumi Shimomura ,  Tatsuya Shiragaki ,  Naoya Henmi

IPC分类号： H04B1008

CPC分类号： H04L1/20 ,  H04B10/07953 ,  H04L25/063 ,  H04Q11/0005 ,  H04Q2011/0039 ,  H04Q2011/0045 ,  H04Q2011/0083

摘要： A signal quality monitoring method with reliability is disclosed. After extracting a clock signal from the light signal, a decision region is set for each bit of the light signal. The decision region is defined by a plurality of threshold amplitudes corresponding respectively to threshold phases which are produced with respect to the clock signal. The quality of the light signal is monitored depending on whether an amplitude of the light signal falls into the decision region at timings of the N threshold phases.

摘要翻译： 公开了一种具有可靠性的信号质量监测方法。 在从光信号提取时钟信号之后，为光信号的每一位设置判定区域。 决定区域由分别对应于相对于时钟信号产生的阈值相位的多个阈值幅度来定义。 根据在N个阈值相位的定时，光信号的幅度是否落入判定区域来监视光信号的质量。

公开(公告)号：US06895183B2

公开(公告)日：2005-05-17

申请号：US10134479

申请日：2002-04-30

申请人： Hirofumi Shimomura ,  Naoya Henmi ,  Hitoshi Takeshita

发明人： Hirofumi Shimomura ,  Naoya Henmi ,  Hitoshi Takeshita

IPC分类号： H04B10/02 ,  H04B10/08 ,  H04J14/02

CPC分类号： H04B10/03 ,  H04B10/0771 ,  H04B2210/071 ,  H04B2210/072 ,  H04J14/0212 ,  H04J14/0216 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0245 ,  H04J14/0249 ,  H04J14/0278 ,  H04J14/0283 ,  H04J14/0287 ,  H04J14/0293

摘要： An optical wavelength division coupler 11 wavelength-divides a wavelength multiplexed light to respective wavelength lights each of which is dropped to an optical gate switch 15-i (i=1˜n) and a light receiver 13-i by an optical coupler 12-i and supplied to an optical light fault monitor 14 through the light receiver 13-i. When the optical signal deterioration monitor 14 detects an optical loss of wavelength (OLOW), an optical loss of signal (OLOS) or an optical signal degrade (OSD) in wavelength lights processed by the optical coupler 12-i as a fault detection signal in an optical layer, a controller 19 controls the optical gate switch 15-i to cut off wavelength light passing therethrough and sends an optical alarm indication signal (AIS-O) to a downstream side. Therefore, when a loss of signal is detected by the light receiver 13-i, the optical signal deterioration monitor 14 can know the alarm indication signal (AIS) from the upstream side, removing the necessity of special hardware therefor.

摘要翻译： 光波长分离耦合器11将波长复用的光分别波长到分别通过光耦合器12的光栅开关15-i（i = 1〜n）和光接收器13 -i的各波长光， 并通过光接收器13 -i提供给光学灯故障监视器14。 当光信号劣化监视器14检测到光学损耗波长（OLOW）时，由光耦合器12 -i处理的波长光中的光信号损失（OLOS）或光信号降级（OSD）作为故障检测信号 光学层，控制器19控制光栅开关15 -i以截去通过其中的波长的光，并向下游侧发送光学报警指示信号（AIS-O）。 因此，当由光接收器13 -i检测到信号丢失时，光信号劣化监视器14可以从上游侧知道报警指示信号（AIS），从而消除了特殊硬件的必要性。

公开(公告)号：US06404525B1

公开(公告)日：2002-06-11

申请号：US09123529

申请日：1998-07-28

申请人： Hirofumi Shimomura ,  Naoya Henmi ,  Hitoshi Takeshita

发明人： Hirofumi Shimomura ,  Naoya Henmi ,  Hitoshi Takeshita

IPC分类号： H04J1402

CPC分类号： H04B10/03 ,  H04B10/0771 ,  H04B2210/071 ,  H04B2210/072 ,  H04J14/0212 ,  H04J14/0216 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0245 ,  H04J14/0249 ,  H04J14/0278 ,  H04J14/0283 ,  H04J14/0287 ,  H04J14/0293

摘要： An optical wavelength division coupler 11 wavelength-divides a wavelength multiplexed light to respective wavelength lights each of which is dropped to an optical gate switch 15-i (i=1˜n) and a light receiver 13-i by an optical coupler 12-i and supplied to an optical light fault monitor 14 through the light receiver 13-i. When the optical signal deterioration monitor 14 detects an optical loss of wavelength (OLOW), an optical loss of signal (OLOS) or an optical signal degrade (OSD) in wavelength lights processed by the optical coupler 12-i as a fault detection signal in an optical layer, a controller 19 controls the optical gate switch 15-i to cut off wavelength light passing therethrough and sends an optical alarm indication signal (AIS-O) to a downstream side. Therefore, when a loss of signal is detected by the light receiver 13-i, the optical signal deterioration monitor 14 can know the alarm indication signal (AIS) from the upstream side, removing the necessity of special hardware therefor.

摘要翻译： 光波长分离耦合器11将波长复用的光分别通过光耦合器12-D将各个波长的光分别投射到光栅开关15-i（i = 1〜n）和光接收器13-i上， 并通过光接收器13-i提供给光学灯故障监视器14。 当光信号劣化监视器14检测到波长的光学损失（OLOW）时，由光耦合器12-i处理的波长光中的信号（OLOS）的光损失或光信号降级（OSD）作为故障检测信号 光学层，控制器19控制光栅开关15-i截止通过的波长的光，向下游侧发送光学警报指示信号（AIS-O）。 因此，当由光接收器13-i检测到信号丢失时，光信号劣化监视器14可以从上游侧知道报警指示信号（AIS），从而消除了特殊硬件的必要性。

公开(公告)号：US06400498B1

公开(公告)日：2002-06-04

申请号：US09087213

申请日：1998-05-29

申请人： Hirofumi Shimomura ,  Naoya Henmi

发明人： Hirofumi Shimomura ,  Naoya Henmi

IPC分类号： H01S300

CPC分类号： H04B10/2941 ,  H04B2210/258 ,  H04J14/0221

摘要： Disclosed is an optical signal repeating and amplifying device which has: an optical amplifier which amplifies an optical signal to be input thereto and then outputs it; and an optical filter means through which only one wavelength light of the optical signal to be output from the optical amplifier is passed. Also disclosed is an optical level adjusting device which has: an optical demultiplexer which demultiplexes a wavelength-multiplexed optical signal into a plurality of wavelength lights; a plurality of optical attenuators which attenuate separately the demultiplexed plurality of wavelength lights to be output from the optical demultiplexer; and an optical multiplexer which multiplexes the attenuated wavelength lights to be output from the plurality of optical attenuators into a wavelength-multiplexed optical signal and output it.

公开(公告)号：US06466344B2

公开(公告)日：2002-10-15

申请号：US09939665

申请日：2001-08-28

申请人： Hirofumi Shimomura ,  Seigo Takahashi ,  Naoya Henmi

发明人： Hirofumi Shimomura ,  Seigo Takahashi ,  Naoya Henmi

IPC分类号： H04J1402

CPC分类号： H04Q11/0001 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/094061 ,  H01S3/10007 ,  H01S3/1608 ,  H04J14/0204 ,  H04J14/0206 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0221

摘要： The first present invention provides an optical switch including the following elements. At least a plurality of optical transmission lines are provided for transmission of optical signals. Each of the at least plurality of optical transmission lines have at least an impurity doped fiber. At least an excitation light source is provided for emitting an excitation light. At least an excitation light switch is provided which is connected to the excitation light source and also connected to the at least plurality of optical transmission lines for individual switching operations to supply the excitation light to the at least plurality of optical transmission lines to feed the excitation light to the impurity doped fiber on the at least plurality of optical transmission lines, thereby causing an excitation of the impurity doped fiber on selected one of the at least plurality of optical transmission lines so as to permit a transmission of the optical signal through the excited impurity doped fiber, whilst unselected one of the impurity doped fibers is unexcited whereby the optical signals are absorbed into the unselected one of the impurity doped fibers thereby to discontinue transmission of the optical signal by the unselected one of the impurity doped fibers.

摘要翻译： 第一本发明提供一种包括以下元件的光开关。 至少多个光传输线被提供用于传输光信号。 所述至少多个光传输线中的每一个至少具有杂质掺杂光纤。 至少提供了用于发射激发光的激发光源。 至少提供激励光开关，其连接到激发光源并且还连接到用于单独切换操作的至少多个光传输线，以将激发光提供给至少多个光传输线以馈送激励 在所述至少多个光传输线上对所述杂质掺杂光纤进行光照射，从而使所述杂质掺杂光纤在所述至少多个光传输线路中的所选择的一个光纤传输线路上激发，以允许所述光信号通过所述激发 杂质掺杂光纤，而未选择的杂质掺杂光纤之一是未被激发的，由此光信号被吸收到未选择的杂质掺杂光纤中，从而由未选择的杂质掺杂光纤中止光信号的透射。

公开(公告)号：US07197246B2

公开(公告)日：2007-03-27

申请号：US10227892

申请日：2002-08-27

申请人： Hirofumi Shimomura ,  Seigo Takahashi ,  Naoya Henmi

发明人： Hirofumi Shimomura ,  Seigo Takahashi ,  Naoya Henmi

IPC分类号： H04J14/02

CPC分类号： H04Q11/0001 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/094061 ,  H01S3/10007 ,  H01S3/1608 ,  H04J14/0204 ,  H04J14/0206 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0221

摘要： The first present invention provides an optical switch including the following elements. At least a plurality of optical transmission lines are provided for transmissions of optical signals. Each of the at least plurality of optical transmission lines have at least an impurity doped fiber. At least an excitation light source is provided for emitting an excitation light. At least an excitation light switch is provided which is connected to the excitation light source and also connected to the at least plurality of optical transmission lines for individual switching operations to supply the excitation light to the at least plurality of optical transmission lines to feed the excitation light to the impurity doped fiber on the at least plurality of optical transmission lines, thereby causing an excitation of the impurity doped fiber on selected one of the at least plurality of optical transmission lines so as to permit a transmission of the optical signal through the excited impurity doped fiber, whilst unselected one of the impurity doped fibers is unexcited whereby the optical signals are absorbed into the unselected one of the impurity doped fibers thereby to discontinue transmission of the optical signal by the unselected one of the impurity doped fibers.

摘要翻译： 第一本发明提供一种包括以下元件的光开关。 至少多个光传输线被提供用于光信号的传输。 所述至少多个光传输线中的每一个至少具有杂质掺杂光纤。 至少提供了用于发射激发光的激发光源。 至少提供激励光开关，其连接到激发光源并且还连接到用于单独切换操作的至少多个光传输线，以将激发光提供给至少多个光传输线以馈送激励 在所述至少多个光传输线上对所述杂质掺杂光纤进行光照射，从而使所述杂质掺杂光纤在所述至少多个光传输线路中的所选择的一个光纤传输线路上激发，以允许所述光信号通过所述激发 杂质掺杂光纤，而未选择的杂质掺杂光纤之一是未被激发的，由此光信号被吸收到未选择的杂质掺杂光纤中，从而由未选择的杂质掺杂光纤中止光信号的透射。

公开(公告)号：US06809846B2

公开(公告)日：2004-10-26

申请号：US10721243

申请日：2003-11-26

申请人： Hirofumi Shimomura ,  Naoya Henmi

发明人： Hirofumi Shimomura ,  Naoya Henmi

IPC分类号： G02B612

CPC分类号： H04Q11/0005 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/0206 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0283 ,  H04Q2011/0013 ,  H04Q2011/0015 ,  H04Q2011/0016

摘要： Disclosed is an optical switch for transmitting or shutting down an input light signal in accordance with a set switching state. The optical switch comprises first and second optical amplifiers connected in cascade. When an optical fiber amplifier comprising EDFs (11 and 12) and pumping sources (31 and 32) is used as the first and second optical amplifiers, the switching is accomplished by switching on or off the pumping sources (31 and 32) in accordance with control signals supplied from a control circuit (300). One input light signal can be dropped through a first optical branch (51) located on the input side of the optical switch, while another input light signal can be added through a second optical branch (53).

公开(公告)号：US06424440B1

公开(公告)日：2002-07-23

申请号：US09181620

申请日：1998-10-28

申请人： Hirofumi Shimomura ,  Seigo Takahashi ,  Naoya Henmi

发明人： Hirofumi Shimomura ,  Seigo Takahashi ,  Naoya Henmi

IPC分类号： H04J1402

CPC分类号： H04Q11/0001 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/094061 ,  H01S3/10007 ,  H01S3/1608 ,  H04J14/0204 ,  H04J14/0206 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0221

摘要： The first present invention provides an optical switch including the following elements. At least a plurality of optical transmission lines are provided for transmissions of optical signals. Each of the at least plurality of optical transmission lines have a least an impurity doped fiber. At least an excitation light source is provided for emitting an excitation light. At least an excitation light switch is provided which is connected to the excitation light source and also connected to the at least plurality of optical transmission lines for individual switching operations to supply the excitation light to the at least plurality of optical transmission lines to feed the excitation light to the impurity doped fiber on the at least plurality of optical transmission lines, thereby causing an excitation of the impurity doped fiber on selected one of the at least plurality of optical transmission lines so as to permit a transmission of the optical signal through the excited impurity doped fiber, whilst unselected one of the impurity doped fibers is unexcited whereby the optical signals are absorbed into the unselected one of the impurity doped fibers thereby to discontinue an transmission of the optical signal by the unselected one of the impurity doped fibers.

摘要翻译： 第一本发明提供一种包括以下元件的光开关。 至少多个光传输线被提供用于光信号的传输。 所述至少多个光传输线中的每一个具有至少一个杂质掺杂光纤。 至少提供了用于发射激发光的激发光源。 至少提供激励光开关，其连接到激发光源并且还连接到用于单独切换操作的至少多个光传输线，以将激发光提供给至少多个光传输线以馈送激励 在所述至少多个光传输线上对所述杂质掺杂光纤进行光照射，从而使所述杂质掺杂光纤在所述至少多个光传输线路中的所选择的一个光纤传输线路上激发，以允许所述光信号通过所述激发 杂质掺杂光纤，而未选择的杂质掺杂光纤中的一个是未激发的，由此光信号被吸收到未选择的杂质掺杂光纤中，从而中断由未选择的杂质掺杂光纤传输光信号。