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：US06771907B1

公开(公告)日：2004-08-03

申请号：US09576240

申请日：2000-05-24

申请人： Yuuki Yoshifuji ,  Shuichi Iida ,  Takashi Yamazaki ,  Youko Nakabayashi ,  Shinya Nakamura ,  Kimio Ozawa ,  Naoki Ando ,  Hitoshi Kikuchi ,  Tukasa Haga ,  Hiromitu Watanabe ,  Minoru Shinta ,  Hitoshi Takeshita ,  Shinobu Sasaki ,  Ryou Yamada ,  Naoya Henmi

发明人： Yuuki Yoshifuji ,  Shuichi Iida ,  Takashi Yamazaki ,  Youko Nakabayashi ,  Shinya Nakamura ,  Kimio Ozawa ,  Naoki Ando ,  Hitoshi Kikuchi ,  Tukasa Haga ,  Hiromitu Watanabe ,  Minoru Shinta ,  Hitoshi Takeshita ,  Shinobu Sasaki ,  Ryou Yamada ,  Naoya Henmi

IPC分类号： H04J1400

CPC分类号： H04J14/0295 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0283

摘要： An optical ring system having: a wavelength demultiplexer to which wavelength-multiplexed optical signal to be sent through an optical fiber from a previous node of multiple nodes is input and in which optical signal with each wavelength assigned to itself is demultiplexed; an optical ring device which is disposed in a predetermined node of the multiple nodes to the each wavelength assigned and which is composed of a failure existence judging part which terminates an overhead of each optical signal with a wavelength demultiplexed by the wavelength demultiplexer and judges whether a failure occurs in regard to a wavelength in a previous section through which optical signal with the assigned wavelength is sent, and a switching part which, when the failure existence judging means determines the occurrence of failure, selects a path that allows optical signal with the wavelength to be transmitted to the previous node while avoiding the previous section incurring the failure; and a wavelength multiplexer which multiplexes optical signal to be output from the optical ring part and then outputs it to an optical fiber connected to a next node.

摘要翻译： 一种光环系统，具有波长解复用器，通过来自多个节点的先前节点的光纤输入波分复用光信号，其中分配有每个波长的光信号被解复用; 光环设备，被布置在多个节点的预定节点到分配的每个波长，并且由故障存在判断部分组成，故障存在判断部分终止由波长解复用器解复用的波长的每个光信号的开销，并判断是否 关于发送了具有指定波长的光信号的先前部分中的波长发生故障，以及当故障存在判断装置确定故障发生时，选择允许具有波长的光信号的路径的切换部分 被发送到上一个节点，同时避免前一个部分发生故障; 以及多路复用从光环部分输出的光信号，然后将其输出到连接到下一个节点的光纤。

公开(公告)号：US6061156A

公开(公告)日：2000-05-09

申请号：US16306

申请日：1998-01-30

申请人： Hitoshi Takeshita ,  Naoya Henmi

发明人： Hitoshi Takeshita ,  Naoya Henmi

IPC分类号： G02B6/00 ,  G02B6/122 ,  H04B10/03 ,  H04B10/032 ,  H04B10/079 ,  H04B10/2507 ,  H04B10/27 ,  H04B10/294 ,  H04B10/299 ,  H04M3/18 ,  H04Q3/52 ,  H04Q11/00 ,  H04J14/00 ,  H04J4/00 ,  H04J14/02 ,  H04J14/08

CPC分类号： H04Q11/0005 ,  H04Q2011/0011 ,  H04Q2011/0015 ,  H04Q2011/0043 ,  H04Q2011/0045 ,  H04Q2011/0052

摘要： In an optical transmission system comprising an optical branch unit, first through fourth OR/OS pairs each of which includes optical receiver and optical transmitter, optical switch devices for active and standby systems, each of the optical switch devices having an N number of input ports and M number of output ports; and an optical multiplexer for multiplexing an M number of optical signal supplied from the third OR/OS pair and an M number of optical signals supplied from the fourth OR/OS pair to produce an M number of optical signals, the optical switch devices and the first through the fourth OR/OS pairs have a 3-dB margin with respect to the input optical strength. First and second paths are each adjusted such that the time required for transmitting an optical signal is identical for all paths. The first path is from an output port of the optical branch unit to the point where the optical signals are multiplexed in the optical multiplexer via the first and the third OR/OS pairs, and the optical switch device for the active system. The second path is from an output port of the optical branch unit to the point where the optical signals are multiplexed in the optical multiplexer via the second and the fourth OR/OS pairs, and the optical switch device for the standby system.

摘要翻译： 在包括光分支单元的光传输系统中，第一到第四OR / OS对，其中每一个包括光接收器和光发射器，用于主动和待机系统的光开关装置，每个光开关装置具有N个输入端口 和M个输出端口; 以及光复用器，用于复用从第三OR / OS对提供的M个光信号和从第四OR / OS对提供的M个光信号，以产生M个光信号，光开关器件和 首先通过第四个OR / OS对相对于输入光强度具有3-dB的余量。 每个调整第一和第二路径，使得发送光信号所需的时间对于所有路径是相同的。 第一路径是从光分支单元的输出端口到光信号经由第一和第三OR / OS对复用在光复用器中的点，以及用于主动系统的光开关装置。 第二路径是从光分支单元的输出端口到光信号经由第二和第四OR / OS对复用在光复用器中的点，以及备用系统的光开关器件。

公开(公告)号：US06271949B1

公开(公告)日：2001-08-07

申请号：US08991049

申请日：1997-12-16

申请人： Yoshihiko Suemura ,  Naoya Henmi

发明人： Yoshihiko Suemura ,  Naoya Henmi

IPC分类号： H04J1402

CPC分类号： H04Q11/0005 ,  H04J14/02 ,  H04Q2011/0015 ,  H04Q2011/0022 ,  H04Q2011/0032 ,  H04Q2011/0075 ,  H04Q2011/0086

摘要： An optical wavelength selector is provided that selects WDM channels from WDM optical signal and outputs each WDM channels from a plurality of ports. WDM optical signal in which m×n WDM channels are multiplexed is divided into n WDM channel groups and outputted by means of one wavelength-division demultiplexer. One WDM channel group is selected from the n WDM channel groups by means of n optical gate switches. The selected WDM optical signal is then separated into m WDM channels by wavelength and outputted by means of an optical wavelength router. As a result, m WDM channels of a specific WDM channel group can be received by m optical receivers.

摘要翻译： 提供一种光波长选择器，其从WDM光信号中选择WDM信道，并从多个端口输出每个WDM信道。 其中m×n个WDM信道被多路复用的WDM光信号被分成n个WDM信道组，并通过一个波分解多路复用器输出。 通过n个光栅开关从n个WDM信道组中选择一个WDM信道组。 所选择的WDM光信号经波长分离为m个WDM信道，并通过光波长路由器输出。 结果，m个光接收机可以接收特定WDM信道组的m个WDM信道。

公开(公告)号：US5392303A

公开(公告)日：1995-02-21

申请号：US220223

申请日：1994-03-30

申请人： Takahiro Shiozawa ,  Masayuki Yamaguchi ,  Naoya Henmi

发明人： Takahiro Shiozawa ,  Masayuki Yamaguchi ,  Naoya Henmi

IPC分类号： H01S5/024 ,  H01S5/068 ,  H01S5/0687 ,  H01S3/13

CPC分类号： H01S5/06808 ,  H01S5/024 ,  H01S5/02415 ,  H01S5/06804 ,  H01S5/0687

摘要： A frequency stabilization method of a semiconductor laser is provided. A driving current, a forward voltage and an output light power of the laser mounted on a heat sink is detected. A temperature of the heat sink is also detected. A consumption power of the laser is obtained from the driving current and voltage thus detected, providing a relationship between the output light power and the consumption power. The driving current is controlled so that the output light power is kept constant, and the temperature of the heat sink is controlled based on the relationship so that a temperature of an active layer of the laser is maintained. The output light power is kept constant and at the same time, any temperature change of the active layer is cancelled through the temperature control of the heat sink. Even if the consumption power changes due to an leakage current and/or a recombination current without luminescence to maintain the output light power during long time operation, the temperature of the active layer is maintained by cancelling the consumption power change through the temperature control of the heat sink. Thus, the oscillation frequency of the semiconductor laser can be stabilized at a given value.

摘要翻译： 提供半导体激光器的频率稳定方法。 检测安装在散热器上的激光器的驱动电流，正向电压和输出光功率。 还检测散热器的温度。 从所检测的驱动电流和电压获得激光的消耗功率，提供输出光功率与消耗功率之间的关系。 控制驱动电流，使得输出光功率保持恒定，并且基于保持激光器的有源层的温度的关系来控制散热器的温度。 输出光功率保持恒定，同时通过散热器的温度控制来消除有源层的任何温度变化。 即使消耗功率由于泄漏电流而变化，和/或没有发光的复合电流在长时间运行期间保持输出光功率，有源层的温度通过消除功率变化来维持 散热器。 因此，半导体激光器的振荡频率可以稳定在给定值。

公开(公告)号：US5325225A

公开(公告)日：1994-06-28

申请号：US851

申请日：1993-01-06

申请人： Tetsuyuki Suzaki ,  Naoya Henmi

发明人： Tetsuyuki Suzaki ,  Naoya Henmi

IPC分类号： H04B10/61 ,  H01S5/068 ,  H04B10/2513 ,  H04B10/293 ,  H04B10/516 ,  H04B10/54 ,  H04B10/556 ,  H04B10/564 ,  H04B10/572 ,  H04B10/04

CPC分类号： H04B10/504 ,  H04B10/505

摘要： A method of optical transmission comprises steps of generating a light signal, controlling a wavelength of the light signal in accordance with a correcting signal, and modulating an intensity of the light signal supplied from the light source to generate an output light signal in accordance with a modulating signal. The wavelength change of the light signal generated by the light source coincides with the wavelength change which occurs during the modulating step, so that the wavelength change is cancelled in the output light signal. An optical transmitter used in the method comprises a light source which generates a light signal, a correcting signal generating circuit which supplies the light source with a correcting signal for changing the wavelength of the light signal generated by the light source, and an optical modulator which modulates an intensity of the light signal supplied from the light source to generate an output light signal in accordance with a modulating signal.

摘要翻译： 一种光传输方法包括以下步骤：产生光信号，根据校正信号控制光信号的波长，以及调制从光源提供的光信号的强度，以产生根据光信号的输出光信号 调制信号。 由光源产生的光信号的波长变化与在调制步骤期间发生的波长变化一致，从而在输出光信号中消除波长变化。 在该方法中使用的光发送器包括产生光信号的光源，向光源提供用于改变由光源产生的光信号的波长的校正信号的校正信号发生电路，以及光调制器， 调制从光源提供的光信号的强度，以根据调制信号产生输出光信号。

公开(公告)号：US5227908A

公开(公告)日：1993-07-13

申请号：US729754

申请日：1991-07-15

申请人： Naoya Henmi

发明人： Naoya Henmi

IPC分类号： H04B10/2513 ,  H04B10/50 ,  H04B10/516 ,  H04B10/54 ,  H04B10/548 ,  H04L27/04 ,  H04L27/06

CPC分类号： H04L27/06 ,  H04B10/25137 ,  H04B10/505 ,  H04B10/5165 ,  H04B10/54 ,  H04B10/548 ,  H04L27/04

摘要： A transmitter unit (100) including a semiconductor laser (101) as a carrier light exciting source, a biasing source (102) for providing the semiconductor laser with a d.c. biasing current, an external modulator (105) for intensity-modulating an output light of the semiconductor laser according to a transmission signal, and means (107; 210; 510; 701, 702, 703, 704) for causing the external modulator to output only the carrier light and either side-band light. Also provided is a receiver unit (150) including a receiver (151) for square-law detecting the carrier light and the side-band light supplied from the transmitter unit to obtain an electric signal, and a linear filter (152) for equalizing this electric signal. The present invention results in an optical communication apparatus capable of easily equalizing dispersion distortion caused in a transmission path (115) having a large dispersion from a light-intensity modulated light signal transmitted therethrough.

公开(公告)号：US06445473B1

公开(公告)日：2002-09-03

申请号：US09276671

申请日：1999-03-26

申请人： Yoshihiko Suemura ,  Naoya Henmi

发明人： Yoshihiko Suemura ,  Naoya Henmi

IPC分类号： H04B1000

CPC分类号： H04Q11/0005 ,  H04Q2011/0009 ,  H04Q2011/0011 ,  H04Q2011/0013 ,  H04Q2011/0016 ,  H04Q2011/0058 ,  H04Q2011/0075

摘要： To optimize the number of optical gate switches required by an optical switching apparatus which comprises an optical space switch and wavelength selectors, the following process as a preliminary process of introducing optical signals into the optical space switch, is carried out. In detail, the preliminary process is optically converting the optical signals in relation to the number of input ports of the optical space switch, by optically processing the optical signals. As the results, the number of processed optical signals responding to the input ports and the processed number of wavelengths of each processed optical signal is equal to each other, and thereby, the optimization is achieved.

摘要翻译： 为了优化包括光学空间开关和波长选择器的光学开关装置所需的光栅开关的数量，作为将光信号引入光空间开关的初步处理的以下处理被执行。 详细地说，通过光学处理光信号，初步过程是光学地转换光信号相对于光空间开关的输入端口的数量。 结果，响应于输入端口的处理后的光信号的数量和处理后的光信号的经处理的波长数彼此相等，从而实现优化。

公开(公告)号：US5887039A

公开(公告)日：1999-03-23

申请号：US356555

申请日：1994-12-15

申请人： Yoshihiko Suemura ,  Naoya Henmi ,  Akio Tajima

发明人： Yoshihiko Suemura ,  Naoya Henmi ,  Akio Tajima

IPC分类号： H04J3/00 ,  H04J3/06 ,  H04L7/00 ,  H04L7/04 ,  H04L25/14

CPC分类号： H04L25/14 ,  H04J3/0602

摘要： Parallel digital data are transmitted along with a specific synchronization pattern added thereto. Each synchronization pattern adder adds the synchronization pattern at an equal timing for each channel. Parallel data after the synchronization pattern addition, are converted in parallel-to-serial converters into serial data which are in turn converted in an optical transmitter into optical signal. On the receiving side, the optical signal is converted in an optical receiver into an electric signal, from which the parallel data are restored in serial-to-parallel converters to be inputted to synchronization pattern detectors. The synchronization pattern detectors compare their shift register data and synchronization pattern and hold their synchronization pattern detection signal to be "1" for one time slot if the number of non-accord bits is within one. In the next time slot, a controller recognizes synchronization pattern detection when and only when all the synchronization pattern detection signals are "1". In this way, reliable synchronization pattern detection can be made regardless of the occurrence of any transmission error in the synchronization pattern.

摘要翻译： 平行数字数据与添加到其中的特定同步模式一起发送。 每个同步模式加法器在每个通道的相同定时添加同步模式。 在同步模式添加之后的并行数据被并行转换为串行数据转换为串行数据，这些数据依次在光发射机中转换为光信号。 在接收侧，光信号在光接收机中被转换成电信号，并行数据在并行转换器中被还原，以被输入到同步模式检测器。 同步模式检测器比较它们的移位寄存器数据和同步模式，并且如果非协调位的数目在一个之内，则将它们的同步模式检测信号保持为一个时隙的“1”。 在下一个时隙中，当且当所有同步模式检测信号为“1”时，控制器识别同步模式检测。 以这种方式，可以进行可靠的同步模式检测，而不管同步模式中是否发生任何传输错误。