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    OPTICAL AMPLIFICATION DEVICE, COMMUNICATION SYSTEM, AND AMPLIFICATION METHOD
    1.
    发明申请
    OPTICAL AMPLIFICATION DEVICE, COMMUNICATION SYSTEM, AND AMPLIFICATION METHOD 审中-公开
    光学放大器件，通信系统和放大方法

    公开(公告)号：US20120045212A1

    公开(公告)日：2012-02-23

    申请号：US13179872

    申请日：2011-07-11

    申请人： Tomoaki TAKEYAMA

    发明人： Tomoaki TAKEYAMA

    IPC分类号： H01S3/102 ,  H01S3/14 ,  H04J14/02 ,  H01S3/091

    CPC分类号： H01S3/10015 ,  H01S3/06754 ,  H01S3/10069 ,  H01S3/1301 ,  H01S3/1608

    摘要： According to an aspect of the invention, an amplification device includes an amplifier configured to amplify a signal light by inputting the signal light and an excitation light to a rare-earth doped amplification medium, a wavelength arrangement monitor configured to acquire wavelength arrangement information indicating a wavelength of the signal light, and a light power controller configured to control power of the input excitation light based on the acquired wavelength arrangement information.

    摘要翻译： 根据本发明的一个方面，放大装置包括：放大器，被配置为通过将信号光和激发光输入到稀土掺杂放大介质来放大信号光;波长配置监视器，被配置为获取指示 以及光功率控制器，被配置为基于所获取的波长配置信息来控制输入激励光的功率。

    Optical amplifier
    2.
    发明授权
    Optical amplifier 有权
    光放大器

    公开(公告)号：US08077383B2

    公开(公告)日：2011-12-13

    申请号：US12053816

    申请日：2008-03-24

    申请人： Tomoaki Takeyama ,  Keiko Sasaki ,  Shinichirou Muro

    发明人： Tomoaki Takeyama ,  Keiko Sasaki ,  Shinichirou Muro

    IPC分类号： H01S3/00

    CPC分类号： H01S3/06758 ,  H01S3/10015 ,  H01S3/1305 ,  H01S3/1608 ,  H01S2301/02 ,  H01S2301/04

    摘要： An optical amplifier including: a first amplifying unit amplifying an input light by utilizing a first excitation light and thereby outputting a first amplified light; a second amplifying unit amplifying the first amplified light by utilizing a second excitation light and thereby outputting a second amplified light; and a control unit detecting a first absorption rate of the first excitation light and a second absorption rate of the second excitation light, and controlling a level of the first excitation light and a level of second excitation light based on the first absorption rate and the second absorption rate. The first absorption rate corresponds to a ratio of the first excitation light absorbed in the first amplifying unit, and the second absorption rate corresponds to a ratio of the second excitation light absorbed in the second amplifying unit.

    摘要翻译： 一种光放大器，包括：第一放大单元，利用第一激发光放大输入光，从而输出第一放大光; 第二放大单元，利用第二激发光放大第一放大光，从而输出第二放大光; 以及控制单元，其检测所述第一激发光的第一吸收率和所述第二激发光的第二吸收率，并且基于所述第一吸收率控制所述第一激发光的电平和第二激发光的电平， 吸收率。 第一吸收率对应于第一放大单元吸收的第一激发光的比例，第二吸收率对应于第二放大单元吸收的第二激发光的比例。

    Raman amplifier and excitation light source used thereof
    3.
    发明授权
    Raman amplifier and excitation light source used thereof 有权
    拉曼放大器及其使用的激发光源

    公开(公告)号：US08027082B2

    公开(公告)日：2011-09-27

    申请号：US11964375

    申请日：2007-12-26

    申请人： Shinichirou Muro ,  Tomoaki Takeyama

    发明人： Shinichirou Muro ,  Tomoaki Takeyama

    IPC分类号： H01S3/30 ,  H04B10/17 ,  H04B10/12

    CPC分类号： H01S3/06754 ,  H01S3/09408 ,  H01S3/09415 ,  H01S3/10023 ,  H01S3/1301 ,  H01S3/1305 ,  H01S3/1608 ,  H01S3/302

    摘要： A Raman amplifier provided with a pump source outputting a pumping light; a rare-earth doped fiber inputting the pumping light and outputting an excitation light; and a guiding unit guiding the excitation light to an optical fiber to a direction opposite to which a signal light propagates in the optical fiber.Also a Raman amplifier provided with a plurality of pump sources outputting a plurality of pumping lights; a plurality of rare-earth doped fibers inputting the each of the plurality of pumping lights and outputting a plurality of excitation lights; a guiding unit guiding the plurality of excitation lights to an optical fiber to a direction opposite to which a signal light propagates in the optical fiber.

    摘要翻译： 拉曼放大器配有泵浦源，输出泵浦光; 输入激励光并输出激发光的稀土掺杂光纤; 以及引导单元，其将激发光引导到光纤到与光纤中信号光传播的相反方向。 还有一种拉曼放大器，其具有输出多个泵浦光的多个泵浦光源; 多个稀土掺杂光纤，其输入所述多个泵浦光中的每一个并输出多个激发光; 导向单元，其将多个激发光引导到光纤到与光纤中信号光传播的相反方向。

    Photo-detecting apparatus and photo-detecting method
    4.
    发明授权
    Photo-detecting apparatus and photo-detecting method 有权
    光电检测装置和光电检测方法

    公开(公告)号：US08026538B2

    公开(公告)日：2011-09-27

    申请号：US12285232

    申请日：2008-09-30

    申请人： Tomoaki Takeyama ,  Keiko Sasaki ,  Shinichirou Muro

    发明人： Tomoaki Takeyama ,  Keiko Sasaki ,  Shinichirou Muro

    IPC分类号： H01S3/04

    CPC分类号： H01L31/102

    摘要： A photo-detecting apparatus includes a photodiode that coverts light into electricity, a reverse-voltage switching unit that switches a reverse voltage to be applied to the photodiode, a current-difference detecting unit that detects a change in an output current of the photodiode occurring due to switching of the reverse voltage as a current difference, a correspondence retaining unit that retains a correspondence between the current difference and a dark current, a dark-current calculating unit that calculates a dark current by referring to the correspondence based on the current difference detected by the current-difference detecting unit, and a dark-current correcting unit that corrects the output current of the photodiode based on the dark current to find a photocurrent obtained through photoelectric conversion.

    摘要翻译： 一种光电检测装置，包括：将光转换成电的光电二极管;反相电压切换单元，其切换施加到光电二极管的反向电压;电流差检测单元，检测发生的光电二极管的输出电流的变化; 由于反向电压作为电流差的切换，保持电流差和暗电流之间的对应关系的对应关系保持单元，参照基于电流差的对应关系计算暗电流的暗电流计算单元 由电流差检测单元检测，以及暗电流校正单元，其基于暗电流校正光电二极管的输出电流，以找到通过光电转换获得的光电流。

    Optical transmission apparatus and optical attenuation amount control method
    5.
    发明申请
    Optical transmission apparatus and optical attenuation amount control method 有权
    光传输装置及光衰减量控制方法

    公开(公告)号：US20090297143A1

    公开(公告)日：2009-12-03

    申请号：US12453060

    申请日：2009-04-28

    申请人： Tomoaki Takeyama ,  Ichiro Nakajima ,  Keiko Sasaki ,  Shinichirou Muro ,  Etsuko Hayashi

    发明人： Tomoaki Takeyama ,  Ichiro Nakajima ,  Keiko Sasaki ,  Shinichirou Muro ,  Etsuko Hayashi

    IPC分类号： H04B10/08 ,  H04B10/04

    CPC分类号： H04B10/07955 ,  H04J14/0221

    摘要： In an optical transmission apparatus, levels of signal lights obtained by demultiplexing a WDM signal and corresponding to channels are detected, based on which a channel in which a signal is transmitted and a channel in which no signal is transmitted are determined. An attenuation amount of a channel in which no signal is transmitted in a predetermined range from the channel in which the signal is transmitted is set to a value equal to an attenuation amount of the channel in which the signal is transmitted. An attenuation amount of a channel in which no signal is transmitted out of the predetermined range from the channel in which the signal is transmitted is set to a value larger than the attenuation amount of the channel in which the signal is transmitted. The signal lights are attenuated based on the values and multiplexed.

    摘要翻译： 在光传输装置中，检测通过对WDM信号进行解复用和对应于信道而获得的信号光的电平，基于该信号的信号被发送的信道和没有发送信号的信道被确定。 在发送信号的信道的预定范围内不发送信号的信道的衰减量被设定为等于发送信号的信道的衰减量的值。 没有信号从发送信号的信道发送出预定范围的信道的衰减量被设置为大于发送信号的信道的衰减量的值。 信号灯根据值进行衰减并进行复用。

    RAMAN AMPLIFIER AND EXCITATION LIGHT SOURCE USED THEREOF
    6.
    发明申请
    RAMAN AMPLIFIER AND EXCITATION LIGHT SOURCE USED THEREOF 有权
    拉曼放大器和激活光源

    公开(公告)号：US20080158657A1

    公开(公告)日：2008-07-03

    申请号：US11964375

    申请日：2007-12-26

    申请人： Shinichirou Muro ,  Tomoaki Takeyama

    发明人： Shinichirou Muro ,  Tomoaki Takeyama

    IPC分类号： H01S3/30 ,  H01S3/09

    CPC分类号： H01S3/06754 ,  H01S3/09408 ,  H01S3/09415 ,  H01S3/10023 ,  H01S3/1301 ,  H01S3/1305 ,  H01S3/1608 ,  H01S3/302

    摘要： A Raman amplifier provided with a pump source outputting a pumping light; a rare-earth doped fiber inputting the pumping light and outputting an excitation light; and a guiding unit guiding the excitation light to an optical fiber to a direction opposite to which a signal light propagates in the optical fiber.Also a Raman amplifier provided with a plurality of pump sources outputting a plurality of pumping lights, a plurality of rare-earth doped fibers inputting the each of the plurality of pumping lights and outputting a plurality of excitation lights; a guiding unit guiding the plurality of excitation lights to an optical fiber to a direction opposite to which a signal light propagates in the optical fiber.

    摘要翻译： 拉曼放大器配有泵浦源，输出泵浦光; 输入激励光并输出激发光的稀土掺杂光纤; 以及引导单元，其将激发光引导到光纤到与光纤中信号光传播的相反方向。 还有一种拉曼放大器，其具有输出多个泵浦光的多个泵浦源，输入多个泵浦光中的每一个并输出多个激发光的多个稀土掺杂光纤; 导向单元，其将多个激发光引导到光纤到与光纤中信号光传播的相反方向。

    Optical amplifier
    8.
    发明申请
    Optical amplifier 失效
    光放大器

    公开(公告)号：US20070229941A1

    公开(公告)日：2007-10-04

    申请号：US11598098

    申请日：2006-11-13

    申请人： Tomoaki Takeyama ,  Keiko Sasaki ,  Shinichirou Muro

    发明人： Tomoaki Takeyama ,  Keiko Sasaki ,  Shinichirou Muro

    IPC分类号： H01S3/00 ,  H04B10/12

    CPC分类号： H04B10/2935 ,  H01S3/06758 ,  H01S3/10015

    摘要： An optical amplifier of the present invention comprises: first and second optical amplifying sections connected in series to each other between an input port and an output port; a first variable optical attenuator arranged on a former stage of the first optical amplifying section; a second variable optical attenuator arranged between the first and second optical amplifying sections; an optical amplification control section that controls the first and second optical amplifying sections; and an optical attenuation control section that controls the first and second variable optical attenuators. The optical amplification control section controls each of the optical amplifying sections so that a gain of the entirety of the optical amplifier is held constant, and the optical attenuation control section controls attenuation amounts of the variable optical attenuators so that monitor values of the output powers from the variable optical attenuators approximate the same value, provided that a value of the sum of the attenuation amounts of the variable optical attenuators decided according to the signal light input power per one wavelength of a WDM light is held constant. As a result, it becomes possible to provide at a low cost the optical amplifier capable of achieving flat output wavelength characteristics and the favorable NF, irrespective of the signal light input power per one wavelength of the WDM light and the number of wavelengths thereof.

    摘要翻译： 本发明的光放大器包括：在输入端口和输出端口之间彼此串联连接的第一和第二光放大部分; 布置在第一光放大部分的前级上的第一可变光衰减器; 布置在第一和第二光放大部分之间的第二可变光衰减器; 控制所述第一和第二光学放大部分的光放大控制部分; 以及光衰减控制部分，其控制第一和第二可变光衰减器。 光放大控制部分控制每个光放大部分，使得整个光放大器的增益保持恒定，并且光衰减控制部分控制可变光衰减器的衰减量，使得输出功率的监视值从 可变光衰减器近似相同的值，条件是根据WDM光的每一个波长的信号光输入功率确定的可变光衰减器的衰减量之和的值保持恒定。 结果，可以以低成本提供能够实现平坦的输出波长特性和良好的NF的光放大器，而与WDM光的每个波长的信号光输入功率和波长数无关。