公开(公告)号：US5986789A

公开(公告)日：1999-11-16

申请号：US812158

申请日：1997-03-06

申请人： Shingo Kawai ,  Kenichi Suzuki ,  Katsumi Iwatsuki

发明人： Shingo Kawai ,  Kenichi Suzuki ,  Katsumi Iwatsuki

IPC分类号： H04B10/2507 ,  H04B10/18 ,  H04B10/12

CPC分类号： H04B10/25077

摘要： An optical transmission line formed by a plurality of transmission circuits each comprising, connected in the following order, an optical fiber, an optical amplifier and an optical filter. The dispersion decrease in each optical fiber and the amplification of each optical amplifier are set for each transmission circuit such as to obtain a predetermined optical pulse width, the central frequencies of the optical filters are made to sequentially slide toward lower frequencies along the direction of propagation, and the mean zero-dispersion wavelengths of the optical fibers are made to sequentially increase along the direction of propagation. An optical transmission system according to the present invention is formed from an optical transmission line according to the present invention, an optical transmitter and an optical receiver.

摘要翻译： 由多个传输电路形成的光传输线，每个传输电路包括以下顺序连接的光纤，光放大器和滤光器。 为了获得预定的光脉冲宽度，为每个发射电路设置每个光纤的色散减小和每个光放大器的放大，使得滤光器的中心频率沿着传播方向向较低的频率顺序地滑动 ，并且使光纤的平均零色散波长沿着传播方向依次增加。 根据本发明的光传输系统由根据本发明的光传输线，光发射机和光接收机形成。

公开(公告)号：US5764841A

公开(公告)日：1998-06-09

申请号：US840024

申请日：1997-04-24

申请人： Katsumi Iwatsuki ,  Kenichi Suzuki ,  Shingo Kawai

发明人： Katsumi Iwatsuki ,  Kenichi Suzuki ,  Shingo Kawai

IPC分类号： G02B6/34 ,  H04B10/2525 ,  G02B6/02

CPC分类号： H04B10/25253

摘要： The optical fiber transmission line according to the present invention comprises first optical fibers having dispersion values greater than the average dispersion value D.sub.av over the entire transmission distance and second optical fibers having dispersion values less than the average dispersion value D.sub.av, wherein the average dispersion value D.sub.av over the entire transmission distance is in the anomalous dispersion region, the respective lengths L.sub.i and L.sub.i ' of the first and second optical fibers are shorter than the soliton length Z.sub.0 (wherein i is an arbitrary natural number), and the relationship between the lengths L.sub.i and L.sub.i ' and the larger of the respective differences D.sub.i and D.sub.i ' between the dispersion values of the first and second optical fibers and the average dispersion value D.sub.av satisfies the following condition: (L.sub.i +L.sub.i ')/Z.sub.0

摘要翻译： 根据本发明的光纤传输线包括在整个传输距离上具有大于平均色散值Dav的色散值的第一光纤和具有小于平均色散值Dav的色散值的第二光纤，其中平均色散值Dav 在整个传输距离处于异常色散区域中，第一和第二光纤的相应长度Li和Li'短于孤子长度Z0（其中i是任意自然数），并且长度Li 和Li'，并且第一和第二光纤的色散值与平均色散值Dav之间的差值Di和Di'中较大的值满足以下条件：（Li + Li'）/ Z0 <0.35 / {1+ 0.20（Di和Di'/ Dav中的较大者）}

公开(公告)号：US20090161708A1

公开(公告)日：2009-06-25

申请号：US11568109

申请日：2006-02-02

申请人： Shingo Kawai ,  Kiyoshi Matsumoto ,  Hideo Kawata ,  Naoto Yoshimoto ,  Katsumi Iwatsuki

发明人： Shingo Kawai ,  Kiyoshi Matsumoto ,  Hideo Kawata ,  Naoto Yoshimoto ,  Katsumi Iwatsuki

IPC分类号： H01S3/13 ,  H01S3/04

CPC分类号： H01S5/0687 ,  H01S5/0617 ,  H01S5/06804 ,  H01S5/0683

摘要： In the present invention, the extremely complicated setting and control and an extremely expensive optical component (wavelength locker) are not required, and optical output wavelength and optical output power can simply be set and controlled at a moderate price. At least one value for determining a dependence of the optical output wavelength on drive current and device temperature and at least one value for determining a dependence of the optical output power on drive current and device temperature in a light emitting device constituting first means 1 for emitting light are stored in fourth means 4. Fifth means 5 determines drive current or optical output power c and device temperature d, at which both the optical output wavelength and optical output power of the light emitting device are separately specified value b, from a relationship among the drive current, device temperature, and optical output wavelength of the light emitting device, the relationship being determined by the at least one value, and a relationship among the drive current, device temperature, and optical output power, the relationship being determined by the at least one value, and the fifth means 5 gives the drive current or optical output power c and device temperature d as target values to second means 2 and third means 3.

摘要翻译： 在本发明中，不需要非常复杂的设置和控制以及极其昂贵的光学部件（波长锁定器），并且可以以适中的价格简单地设置和控制光输出波长和光输出功率。 用于确定光输出波长对驱动电流和器件温度的依赖性的至少一个值和用于确定构成用于发射的第一装置1的发光器件中的光输出功率对驱动电流和器件温度的依赖性的至少一个值 光存储在第四装置4中。第五装置5确定驱动电流或光输出功率c和器件温度d，其中发光器件的光输出波长和光输出功率两者分别指定值b， 所述驱动电流，器件温度和所述发光器件的光输出波长，所述关系由所述至少一个值确定，以及所述驱动电流，器件温度和光输出功率之间的关系，所述关系由 至少一个值，第五装置5给出驱动电流或光输出功率c和器件温度d 作为第二装置2和第三装置3的目标值。

公开(公告)号：US07869717B2

公开(公告)日：2011-01-11

申请号：US11568109

申请日：2006-02-02

申请人： Shingo Kawai ,  Kiyoshi Matsumoto ,  Hideo Kawata ,  Naoto Yoshimoto ,  Katsumi Iwatsuki

发明人： Shingo Kawai ,  Kiyoshi Matsumoto ,  Hideo Kawata ,  Naoto Yoshimoto ,  Katsumi Iwatsuki

IPC分类号： H04B10/04 ,  H01S3/13

CPC分类号： H01S5/0687 ,  H01S5/0617 ,  H01S5/06804 ,  H01S5/0683

摘要： In the present invention, the extremely complicated setting and control and an extremely expensive optical component (wavelength locker) are not required, and optical output wavelength and optical output power can simply be set and controlled at a moderate price. At least one value for determining a dependence of the optical output wavelength on drive current and device temperature and at least one value for determining a dependence of the optical output power on drive current and device temperature in a light emitting device constituting first means 1 for emitting light are stored in fourth means 4. Fifth means 5 determines drive current or optical output power c and device temperature d, at which both the optical output wavelength and optical output power of the light emitting device are separately specified value b, from a relationship among the drive current, device temperature, and optical output wavelength of the light emitting device, the relationship being determined by the at least one value, and a relationship among the drive current, device temperature, and optical output power, the relationship being determined by the at least one value, and the fifth means 5 gives the drive current or optical output power c and device temperature d as target values to second means 2 and third means 3.

摘要翻译： 在本发明中，不需要非常复杂的设置和控制以及极其昂贵的光学部件（波长锁定器），并且可以以适中的价格简单地设置和控制光输出波长和光输出功率。 用于确定光输出波长对驱动电流和器件温度的依赖性的至少一个值和用于确定构成用于发射的第一装置1的发光器件中的光输出功率对驱动电流和器件温度的依赖性的至少一个值 光存储在第四装置4中。第五装置5确定驱动电流或光输出功率c和器件温度d，其中发光器件的光输出波长和光输出功率两者分别指定值b， 所述驱动电流，器件温度和所述发光器件的光输出波长，所述关系由所述至少一个值确定，以及所述驱动电流，器件温度和光输出功率之间的关系，所述关系由 至少一个值，第五装置5给出驱动电流或光输出功率c和器件温度d 作为第二装置2和第三装置3的目标值。

公开(公告)号：US07206510B2

公开(公告)日：2007-04-17

申请号：US10266905

申请日：2002-10-08

申请人： Hiroo Suzuki ,  Masamichi Fujiwara ,  Mitsuhiro Teshima ,  Koji Akimoto ,  Shingo Kawai ,  Jun-ichi Kani ,  Noboru Takachio ,  Katsumi Iwatsuki

发明人： Hiroo Suzuki ,  Masamichi Fujiwara ,  Mitsuhiro Teshima ,  Koji Akimoto ,  Shingo Kawai ,  Jun-ichi Kani ,  Noboru Takachio ,  Katsumi Iwatsuki

IPC分类号： H04B10/20 ,  G02F1/00

CPC分类号： H04J14/02

摘要： A first optical fiber transmission path is used to transmit continuous-wave light for upstream signal light from the center node to each of the remote nodes, while a second optical fiber transmission path is used to transmit downstream signal light from the center node to each remote node and to transmit upstream signal light (obtained by modulating continuous-wave light) from each remote node to the center node. In this network, specific wavelength bandwidths are allocated to each remote node for the continuous-wave lights (for upstream signal lights) and the downstream signal lights, and the wavelength bandwidths for the continuous-wave lights (for upstream signal lights) and the downstream signal lights are alternately set.

摘要翻译： 第一光纤传输路径用于将用于上行信号光的连续波光从中心节点传输到每个远程节点，而第二光纤传输路径用于将来自中心节点的下行信号光传输到每个远程节点 并且将从每个远程节点发送的上行信号光（通过调制连续波光获得）发送到中心节点。 在该网络中，针对连续波灯（用于上行信号灯）和下行信号灯以及连续波光（用于上行信号灯）和下游的波长带宽，分配给每个远程节点的特定波长带宽 信号灯交替设定。

公开(公告)号：US07127168B2

公开(公告)日：2006-10-24

申请号：US10163849

申请日：2002-06-05

申请人： Jun-ichi Kani ,  Katsuhiro Araya ,  Noboru Takachio ,  Koji Akimoto ,  Mitsuhiro Teshima ,  Masamichi Fujiwara ,  Hiroo Suzuki ,  Shingo Kawai ,  Katsumi Iwatsuki

发明人： Jun-ichi Kani ,  Katsuhiro Araya ,  Noboru Takachio ,  Koji Akimoto ,  Mitsuhiro Teshima ,  Masamichi Fujiwara ,  Hiroo Suzuki ,  Shingo Kawai ,  Katsumi Iwatsuki

IPC分类号： H04B10/00

CPC分类号： H04J14/02 ,  H04B10/506 ,  H04J14/0221 ,  H04J14/0227 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0282 ,  H04J14/0297

摘要： Multi-wavelength light having a frequency band equal to or greater than the FSR of an AWG is demultiplexed into individual wavelength channels, and power level deviations between wavelength channels are suppressed. An optical demultiplexer includes a wavelength-group demultiplexer that demultiplexes multi-wavelength light into wavelength groups formed from wavelength channels, and channel demultiplexers that demultiplex each wavelength group into wavelength channels light. An optical multiplexer includes channel multiplexers that multiplex modulated signal light of each wavelength channel for each wavelength group, and a wavelength-group multiplexer that multiplexes, for each wavelength group, WDM signal light output from the channel multiplexers. The FSR of the wavelength-group multiplexer/demultiplexer is set to be equal to or greater than the frequency band of the multi-wavelength light. The channel multiplexer/demultiplexer is an AWG in which the FSR is approximately the full width at half maximum of the transmission characteristics of each port of the wavelength-group multiplexer/demultiplexer.

公开(公告)号：US07460572B2

公开(公告)日：2008-12-02

申请号：US10534770

申请日：2004-05-13

申请人： Shingo Kawai ,  Hideo Kawada ,  Naoto Yoshimoto ,  Toru Ogawa ,  Katsumi Iwatsuki

发明人： Shingo Kawai ,  Hideo Kawada ,  Naoto Yoshimoto ,  Toru Ogawa ,  Katsumi Iwatsuki

IPC分类号： H01S5/0687

CPC分类号： H01S5/068 ,  H01S5/06804 ,  H01S5/06808 ,  H01S5/0683

摘要： The present invention provides wavelength monitoring and/or control enabling size reduction and low power operation without requiring a complicated optical system in its wavelength monitoring and controlling mechanism.The measurement portion (1) measures temperature by a thermistor (5) in the measurement portion, and measures a bias current by using an LD drive current detecting circuit (6). The LD temperature, optical output and bias current are measured by the measurement portion. The relationship between the LD temperature and wavelengths or between the temperature, bias current and wavelengths is stored in a memory map of the storage portion (2). The central controlling portion (3) calculates wavelengths on the basis of the temperature and the bias current or the temperature information of the measurement portion, and the relationship between the LD temperature, bias current and wavelengths or between the temperature and wavelengths of the storage portion.

摘要翻译： 本发明提供了波长监视和/或控制，使得能够进行尺寸缩小和低功率操作，而不需要其波长监视和控制机制中的复杂的光学系统。 测量部分（1）通过测量部分中的热敏电阻（5）测量温度，并且通过使用LD驱动电流检测电路（6）来测量偏置电流。 LD温度，光输出和偏置电流由测量部分测量。 LD温度和波长之间或温度，偏置电流和波长之间的关系存储在存储部分（2）的存储器映射中。 中央控制部分（3）基于测量部分的温度和偏置电流或温度信息，以及LD温度，偏置电流和波长之间的关系或存储部分的温度和波长之间的关系来计算波长 。

公开(公告)号：US20060145051A1

公开(公告)日：2006-07-06

申请号：US10534770

申请日：2004-05-13

申请人： Shingo Kawai ,  Hideo Kawada ,  Naoto Yoshimoto ,  Toru Ogawa ,  Katsumi Iwatsuki

发明人： Shingo Kawai ,  Hideo Kawada ,  Naoto Yoshimoto ,  Toru Ogawa ,  Katsumi Iwatsuki

IPC分类号： G01J1/20

CPC分类号： H01S5/068 ,  H01S5/06804 ,  H01S5/06808 ,  H01S5/0683

摘要： The present invention provides wavelength monitoring and/or control enabling size reduction and low power operation without requiring a complicated optical system in its wavelength monitoring and controlling mechanism. The measurement portion (1) measures temperature by a thermistor (5) in the measurement portion, and measures a bias current by using an LD drive current detecting circuit (6). The LD temperature, optical output and bias current are measured by the measurement portion. The relationship between the LD temperature and wavelengths or between the temperature, bias current and wavelengths is stored in a memory map of the storage portion (2). The central controlling portion (3) calculates wavelengths on the basis of the temperature and the bias current or the temperature information of the measurement portion, and the relationship between the LD temperature, bias current and wavelengths or between the temperature and wavelengths of the storage portion.

摘要翻译： 本发明提供了波长监视和/或控制，使得能够进行尺寸缩小和低功率操作，而不需要其波长监视和控制机制中的复杂的光学系统。 测量部分（1）通过测量部分中的热敏电阻（5）测量温度，并且通过使用LD驱动电流检测电路（6）来测量偏置电流。 LD温度，光输出和偏置电流由测量部分测量。 LD温度和波长之间或温度，偏置电流和波长之间的关系存储在存储部分（2）的存储器映射中。 中央控制部分（3）基于测量部分的温度和偏置电流或温度信息，以及LD温度，偏置电流和波长之间的关系或存储部分的温度和波长之间的关系来计算波长 。

公开(公告)号：US06172803B2

公开(公告)日：2001-01-09

申请号：US09171409

申请日：1998-10-16

申请人： Hiroji Masuda ,  Shingo Kawai ,  Kenichi Suzuki ,  Kazuo Aida

发明人： Hiroji Masuda ,  Shingo Kawai ,  Kenichi Suzuki ,  Kazuo Aida

IPC分类号： H01S300

CPC分类号： H04B10/2912 ,  H01S3/06758 ,  H01S3/094003 ,  H01S3/094011 ,  H01S3/094096 ,  H01S3/1608 ,  H01S3/302 ,  H01S2301/04 ,  H04B10/291 ,  H04B10/2916 ,  H04B10/2941 ,  H04B2210/003

摘要： An optical amplifier having a two-stage construction using an erbium doped fiber (EDF) as a gain medium. The erbium dopant concentration is 1000 ppm, and the unsaturated absorption coefficient of the signal beam at 1550 nm is 1 dB/m. The length of the EDF 14-8 is 10 m, and the length of the EDF 14-12 is 70 m. The excitation light sources 14-6 and 14-10 are semiconductor lasers of 1.53 &mgr;m, and the excitation light power is 100 mW. Multiplexers 14-7 and 14-11 are inductive multi-layer film filters, and the gain equalizer 14-4 is a Fourier filter. The peak loss of the Fourier filter is 17 dB. The gain of the EDF 14-8 is 25 dB, and the gain of the EDF 14-12 is 15 dB. Two optical isolators are installed on a pre-stage amplifier, and one on a post-stage amplifier in order to prevent laser oscillation.

摘要翻译： 一种具有使用掺铒光纤（EDF）作为增益介质的两级结构的光放大器。 铒掺杂剂浓度为1000ppm，1550nm处的信号束的不饱和吸收系数为1dB / m。 EDF14-8的长度为10μm，EDF14-12的长度为70μm。 激发光源14-6和14-10是1.53μm的半导体激光器，激发光功率为100mW。 多路复用器14-7和14-11是感性多层膜滤波器，增益均衡器14-4是傅立叶滤波器。 傅立叶滤波器的峰值损耗为17 dB。 EDF 14-8的增益为25 dB，EDF 14-12的增益为15 dB。 两个光隔离器安装在前级放大器上，一个安装在后级放大器上，以防止激光振荡。

公开(公告)号：US5483035A

公开(公告)日：1996-01-09

申请号：US309654

申请日：1994-09-21

申请人： Shingo Kawai ,  Kenji Sahashi

发明人： Shingo Kawai ,  Kenji Sahashi

IPC分类号： B23K11/25 ,  B23K11/24

CPC分类号： B23K11/253

摘要： A resistance welder controller is disclosed, which controls a resistance welder for welding workpieces clamped between two electrodes with Joule heat generated by passing a welding current between the electrodes. The controller includes a preliminary current passing device for passing preliminary current between the electrodes until the workpieces and the electrodes become intimate with one another, a regular current passing device for passing regular current between the electrodes for welding the workpieces, a current control device for controlling the welding current according to the rate of expansion of the workpieces or the rate of increase of the resistance of the workpieces, and a current passing ending device for ending the welding current at or after an instant when the rate of expansion of the workpieces or the rate of increase of the resistance of the workpieces has become substantially zero.

摘要翻译： 公开了一种电阻焊机控制器，其控制电阻焊机用于焊接夹在两个电极之间的工件，其中通过在电极之间通过焊接电流而产生焦耳热。 控制器包括用于在电极之间通过预备电流的预备电流通过装置，直到工件和电极彼此亲近，用于在电极之间通过正常电流以焊接工件的常规电流通过装置，用于控制的电流控制装置 焊接电流根据工件的膨胀率或工件的电阻的增加率，以及用于在工件的膨胀率或者工件的膨胀率之后或之后结束焊接电流的电流通过结束装置 工件的电阻的增加率基本上为零。