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1. 发明授权

US08538264B2 Dispersion compensating apparatus, dispersion compensating method, optical receiving apparatus, and optical receiving method 有权
标题翻译：色散补偿装置，色散补偿方法，光接收装置和光接收方法
公开(公告)号：US08538264B2
公开(公告)日：2013-09-17
申请号：US12788773
申请日：2010-05-27
申请人： Masahiro Yuki , Tsukasa Takahashi , Miki Onaka , Norifumi Shukunami , Tatsuya Tsuzuki , Toshihiro Ohtani , Ryosuke Goto
发明人： Masahiro Yuki , Tsukasa Takahashi , Miki Onaka , Norifumi Shukunami , Tatsuya Tsuzuki , Toshihiro Ohtani , Ryosuke Goto
IPC分类号： H04B10/00 , H04B10/12 , H04J14/02
CPC分类号： H04B10/25133
摘要： A dispersion compensating apparatus includes a tunable dispersion compensator that dispersion-compensates an optical signal using a group delay property that is asymmetrical in bands outside an effective band; a set device that sets a dispersion compensation amount in the tunable dispersion compensator; and a shifter that shifts a central frequency of the effective band of the tunable dispersion compensator, based on the dispersion compensation amount set by the set device.
摘要翻译：色散补偿装置包括可调色散补偿器，其使用在有效频带之外的频带中不对称的组延迟特性对光信号进行色散补偿; 设置可调色散补偿器中的色散补偿量的集合装置; 以及基于由所述设定装置设定的色散补偿量，使所述可调色散补偿器的有效频带的中心频率偏移的移位器。

2. 发明授权

US07251072B2 Optical transmission system 有权
标题翻译：光传输系统
公开(公告)号：US07251072B2
公开(公告)日：2007-07-31
申请号：US10635723
申请日：2003-08-07
申请人： Toshihiro Ohtani , Tsukasa Takahashi , Eiji Ishikawa , Hiroto Ikeda , Hiroyuki Deguchi
发明人： Toshihiro Ohtani , Tsukasa Takahashi , Eiji Ishikawa , Hiroto Ikeda , Hiroyuki Deguchi
IPC分类号： H04B10/17
CPC分类号： H04B10/2937 , H01S3/302 , H04B10/0775 , H04B10/2916 , H04B2210/078 , H04B2210/08
摘要： A reliable optical transmission system with an improved signal control mechanism that avoids abrupt power variations of light beams, thereby preventing optical supervisory channel (OSC) signals from experiencing errors. An optical amplifier amplifies main signals under the control of an optical amplifier controller, which spends a first predetermined time to raise the output power of the optical amplifier up to a desired level. A pump light source produces a pump beam for injection to a fiber-optic transmission line so as to make it serve as an amplifying medium. The pump light source is controlled by a pump light source controller that spends a second predetermined time to raise the pump beam to a desired power level. This stepwise start-up process of the amplifier power and pump beam power prevents OSC signals from experiencing abrupt power variations.
摘要翻译：一种具有改进的信号控制机制的可靠的光传输系统，其避免了光束的突然功率变化，从而防止光监控信道（OSC）信号经历错误。光放大器在光放大器控制器的控制下放大主信号，光放大器控制器花费第一预定时间将光放大器的输出功率提高到期望的水平。泵浦光源产生用于注射到光纤传输线的泵浦光束，以使其用作放大介质。泵浦光源由泵浦光源控制器控制，泵控制器花费第二预定时间将泵浦光束升高到期望的功率水平。放大器功率和泵浦波束功率的逐步启动过程防止OSC信号经历突然的功率变化。

3. 发明申请

US20050057794A1 Raman excitation control method and optical transmission system using the same 审中-公开
标题翻译：拉曼激发控制方法和光传输系统使用相同
公开(公告)号：US20050057794A1
公开(公告)日：2005-03-17
申请号：US10703567
申请日：2003-11-10
申请人： Toshihiro Ohtani , Futoshi Izumi , Shota Mori , Tsukasa Takahashi , Hideki Kobayashi
发明人： Toshihiro Ohtani , Futoshi Izumi , Shota Mori , Tsukasa Takahashi , Hideki Kobayashi
IPC分类号： G02F1/35 , H01S3/094 , H01S3/0941 , H01S3/13 , H01S3/131 , H01S3/30 , H01S5/06 , H01S5/0683 , H04B10/071 , H04B10/077 , H04B10/29 , H04B10/294 , H04J14/00 , H04J14/02 , H01S3/00
CPC分类号： H04B10/2916 , H01S3/094096 , H01S3/1305 , H01S3/1312 , H01S3/302 , H01S5/0617 , H01S5/0683 , H04B10/0775 , H04B10/2537 , H04B2210/077
摘要： A Raman excitation control method enabling to reduce the number of couplers and photodetectors (PD) for providing an optical transmission unit with reduced cost The method is provided for use in optical amplification to amplify an optical signal using Raman excitation light fed into an optical transmission line. A backward light of a laser diode producing the Raman excitation light is monitored by an optical back power monitor. The monitored power value is compared with an initial set value stored in a memory for the laser diode. Based on this comparison result, a feedback control is performed against the light emission power of the laser diode.
摘要翻译：一种拉曼激励控制方法，能够减少用于提供光传输单元的耦合器和光电探测器（PD）的数量，降低了成本。该方法被提供用于光放大，以使用馈送到光传输线中的拉曼激发光来放大光信号。产生拉曼激发光的激光二极管的向后光由光反向功率监视器监视。将监视的功率值与存储在激光二极管的存储器中的初始设定值进行比较。基于该比较结果，针对激光二极管的发光功率进行反馈控制。

4. 发明授权

US06819828B2 Method and device for optical fiber transmission 失效
标题翻译：光纤传输方法和装置
公开(公告)号：US06819828B2
公开(公告)日：2004-11-16
申请号：US09962111
申请日：2001-09-26
申请人： Tsukasa Takahashi , Toshihiro Ohtani , Yoichi Oikawa
发明人： Tsukasa Takahashi , Toshihiro Ohtani , Yoichi Oikawa
IPC分类号： G02B628
CPC分类号： H04B10/2563 , G02F1/3536
摘要： Disclosed herein is a method including the steps of wavelength division multiplexing a plurality of optical signals having different wavelengths to obtain resultant WDM signal light; transmitting the WDM signal light by an optical fiber transmission line; supplying reference light having a predetermined wavelength to the optical fiber transmission line; generating four-wave mixing in the optical fiber transmission line by the interaction of the WDM signal light and the reference light; detecting the power of light generated as the result of the four-wave mixing; and controlling the power of the WDM signal light to be supplied to the optical fiber transmission line according to the power detected. According to this method, the effect of four-wave mixing can be suppressed.
摘要翻译：这里公开了一种方法，包括以下步骤：波分复用具有不同波长的多个光信号，以获得所得的WDM信号光; 通过光纤传输线传输WDM信号光; 向光纤传输线提供具有预定波长的参考光; 通过WDM信号光和参考光的相互作用在光纤传输线中产生四波混频; 检测由于四波混频而产生的光的功率; 以及根据检测到的功率来控制要提供给光纤传输线的WDM信号光的功率。根据该方法，可以抑制四波混频的效果。

5. 发明授权

US06674567B2 Raman excitation control method and optical transmission system using the same 有权
标题翻译：拉曼激发控制方法和光传输系统使用相同
公开(公告)号：US06674567B2
公开(公告)日：2004-01-06
申请号：US09931078
申请日：2001-08-17
申请人： Toshihiro Ohtani , Futoshi Izumi , Shota Mori , Tsukasa Takahashi , Hideki Kobayashi
发明人： Toshihiro Ohtani , Futoshi Izumi , Shota Mori , Tsukasa Takahashi , Hideki Kobayashi
IPC分类号： H01S300
CPC分类号： H04B10/2916 , H01S3/094096 , H01S3/1305 , H01S3/1312 , H01S3/302 , H01S5/0617 , H01S5/0683 , H04B10/0775 , H04B10/2537 , H04B2210/077
摘要： A Raman excitation control method enabling to reduce the number of couplers and photodetectors (PD) for providing an optical transmission unit with reduced cost. The method is provided for use in optical amplification to amplify an optical signal using Raman excitation light fed into an optical transmission line. A backward light of a laser diode producing the Raman excitation light is monitored by an optical back power monitor. The monitored power value is compared with an initial set value stored in a memory for the laser diode. Based on this comparison result, a feedback control is performed against the light emission power of the laser diode.
摘要翻译：一种拉曼激励控制方法，其能够以降低的成本减少用于提供光传输单元的耦合器和光电探测器（PD）的数量。该方法被提供用于光放大，以使用馈送到光传输线中的拉曼激发光放大光信号。产生拉曼激发光的激光二极管的向后光由光反向功率监视器监视。将监视的功率值与存储在激光二极管的存储器中的初始设定值进行比较。基于该比较结果，针对激光二极管的发光功率进行反馈控制。

6. 发明授权

US06532102B2 Optical amplifier 有权
公开(公告)号：US06532102B2
公开(公告)日：2003-03-11
申请号：US09891205
申请日：2001-06-26
申请人： Hideki Kobayashi , Tsukasa Takahashi , Toshihiro Ohtani , Futoshi Izumi , Shota Mori
发明人： Hideki Kobayashi , Tsukasa Takahashi , Toshihiro Ohtani , Futoshi Izumi , Shota Mori
IPC分类号： H01S300
CPC分类号： H04B10/2918 , H04B10/03 , H04B10/0775 , H04B10/0777 , H04B10/2916 , H04B2210/078 , H04B2210/08
摘要： An optical amplifier and an optical multiplexing transmission system using the same are disclosed. Automatic restoration of the operation becomes possible and malfunctioning of an APSD function is prevented. The optical amplifier using Raman amplification includes; a Raman excitation light source for generating Raman light; and a detection circuit for detecting a signal error in an OSC (optical supervisory channel) signal transmitted in addition to optical transmission signal. When the detection circuit detects a bit error in the OSC signal, an output power from Raman excitation light source is controlled so as not to injure the human body.

7. 发明授权

US09048955B2 Tunable dispersion compensation device, optical reception apparatus, and method for controlling tunable dispersion compensation 有权
标题翻译：可调谐色散补偿装置，光接收装置和用于控制可调色散补偿的方法
公开(公告)号：US09048955B2
公开(公告)日：2015-06-02
申请号：US13488736
申请日：2012-06-05
申请人： Toshihiro Ohtani
发明人： Toshihiro Ohtani
IPC分类号： H04B10/00 , H04B10/08 , H04B10/12 , H04B10/18 , H04B10/2513 , H04B10/2519 , H04B10/2525
CPC分类号： H04B10/25133 , H04B10/2513 , H04B10/2519 , H04B10/2525 , H04B2210/003
摘要： A tunable dispersion compensation device includes a plurality of tunable dispersion compensators coupled in series, a controller configured to control an amount of chromatic dispersion to be set in each of the plurality of tunable dispersion compensators, and a table including a correspondence relationship between an amount of chromatic dispersion and a wavelength band, for each of the plurality of tunable dispersion compensators, wherein the controller decides an amount of chromatic dispersion to be set in each of the plurality of tunable dispersion compensators, based on a total amount of chromatic dispersion desired for the plurality of tunable dispersion compensators and the correspondence relationship included in the table so that a difference between bandwidths of a first tunable dispersion compensator having the widest wavelength band and a second tunable dispersion compensator having the narrowest wavelength band, among the plurality of tunable dispersion compensators, is within a given range.
摘要翻译：可调色散补偿装置包括串联耦合的多个可调谐色散补偿器，控制器被配置为控制要在多个可调色散补偿器中的每一个中设置的色散量，以及包括在对于多个可调色散补偿器中的每一个，其中所述控制器基于所述多个可调色散补偿器所需的色散的总量来确定要设置在所述多个可调色散补偿器中的每一个中的色散量的色散和波长带多个可调谐色散补偿器和包括在表中的对应关系，使得多个可调色散补偿器中具有最宽波段的第一可调色散补偿器的带宽与具有最窄波段的第二可调色散补偿器之间的差异，是withi 在给定范围内。

8. 发明授权

US08259390B2 Optical amplifier apparatus 有权
标题翻译：光放大器装置
公开(公告)号：US08259390B2
公开(公告)日：2012-09-04
申请号：US12409054
申请日：2009-03-23
申请人： Ryuta Hoshi , Toshihiro Ohtani
发明人： Ryuta Hoshi , Toshihiro Ohtani
IPC分类号： H01S5/00 , H04B10/12
CPC分类号： H01S5/50 , H01S3/005 , H01S3/06754 , H01S3/06758 , H01S3/1305 , H01S3/2316 , H01S5/0683 , H04B10/296
摘要： An optical amplifier apparatus includes an optical amplifier including an amplification medium doped with an active substance, the amplification medium excited in order to amplify light; a semiconductor optical amplifier arranged after the optical amplifier; a driver for supplying a driving current with respect to the semiconductor optical amplifier in order that the semiconductor optical amplifier has an amplification characteristic with respect to an input light, the amplification characteristic including a gain non-saturated region and a gain saturated region; and an input-light level adjuster for adjusting an out put light of the optical amplifier to the input light level of the semiconductor optical amplifier, the input light level being set up between the gain non-saturated region and the gain saturated region.
摘要翻译：一种光放大器装置，包括：光放大器，包括掺杂有活性物质的放大介质，所述放大介质被激发以放大光; 配置在光放大器之后的半导体光放大器; 用于向半导体光放大器提供驱动电流的驱动器，以使得半导体光放大器具有相对于输入光的放大特性，该放大特性包括增益非饱和区和增益饱和区; 以及输入光电平调整器，用于将所述光放大器的输出光调整到所述半导体光放大器的输入光电平，所述输入光电平建立在所述增益不饱和区域和所述增益饱和区域之间。

9. 发明授权

US07813647B2 Chromatic dispersion compensation control method and apparatus 有权
标题翻译：色散补偿控制方法和装置
公开(公告)号：US07813647B2
公开(公告)日：2010-10-12
申请号：US11987900
申请日：2007-12-05
申请人： Toshihiro Ohtani
发明人： Toshihiro Ohtani
IPC分类号： H04B10/12
CPC分类号： H04B10/25133
摘要： A chromatic dispersion compensation control method for compensating the chromatic dispersion of an optical transmission path with a variable dispersion compensator inserted in the optical transmission path is disclosed. The method includes a transmitter inserting a fixed data sequence in the rewritable area of a transmission data sequence to be transmitted and transmitting the transmission data sequence to the optical transmission path, the fixed data sequence containing alternating 0-1 data formed of alternating 0s and 1s and alternating 0 series-1 series data formed of alternating series of 0s and 1s; and a receiver determining a direction to increase or decrease the dispersion compensation of the variable dispersion compensator based on the number of error occurrences in the alternating 0-1 data and the number of error occurrences in the alternating 0 series-1 series data, and variably controlling the dispersion compensation of the variable dispersion compensator in accordance with the determined direction.
摘要翻译：公开了一种色散补偿控制方法，用于通过插入在光传输路径中的可变色散补偿器来补偿光传输路径的色散。该方法包括：发送器将固定数据序列插入到要发送的发送数据序列的可重写区域中，并将发送数据序列发送到光传输路径，该固定数据序列包含由0和1交替形成的交替0-1数据交替的0s和1s系列交替出现0系列串联数据; 以及接收机，基于交替的0-1数据中的错误发生次数和交替的0系列-1系列数据中的出错次数，确定可变色散补偿器的色散补偿的增加或减小的方向，并且可变地根据确定的方向控制可变色散补偿器的色散补偿。

10. 发明授权

US07324189B2 Light power adjusting method, optical transmitter, and optical receiver 失效
标题翻译：光功率调节方式，光发射机和光接收机
公开(公告)号：US07324189B2
公开(公告)日：2008-01-29
申请号：US11277559
申请日：2006-03-27
申请人： Toshihiro Ohtani
发明人： Toshihiro Ohtani
IPC分类号： G01N21/00
CPC分类号： H04B10/2537 , H04B10/0775 , H04B10/0777
摘要： The present invention provides provide a light power adjusting method, an optical transmitter, and an optical receiver suitable for ensuring high data transmission quality by preventing the rapid increase in SBS which occurs when the light power exceeds a predetermined value.The incident light power with which the SBS-induced backward propagating light included in the reflected light returned from the optical transmission line rapidly increases, i.e., the light power threshold is calculated.By setting the power of the light incident on the optical transmission line at a value equal to or smaller than the thus calculated light power threshold, the rapid increase in the SBS-induced backward propagating light, which is a nonlinear phenomenon of the optical fiber, is prevented.
摘要翻译：本发明提供了一种光功率调节方法，光发射机和光接收机，其适用于通过防止当光功率超过预定值时发生的SBS的快速增加来确保高数据传输质量。由光传输线返回的反射光中包含的SBS引起的反向传播光的入射光功率快速增加，即计算光功率阈值。通过将入射到光传输线上的光的功率设定为等于或小于由此计算出的光功率阈值的值，作为光纤的非线性现象的SBS感应的反向传播光的快速增加，被阻止

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