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    Optical transmission apparatus
    1.
    发明申请
    Optical transmission apparatus 失效
    光传输装置

    公开(公告)号：US20070274725A1

    公开(公告)日：2007-11-29

    申请号：US11709729

    申请日：2007-02-23

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

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

    IPC分类号： H04J14/00

    CPC分类号： H04J14/0221 ,  H04B10/506 ,  H04B10/564 ,  H04J14/0204 ,  H04J14/0212 ,  H04J14/0227

    摘要： In an optical transmission apparatus, optical power of each of wavelength contained in a wavelength multiplexing signal is measured, a measured value of the optical power of each wavelength is compared with a predetermined threshold value, a total value of the measured values of the optical power, which are equal to or larger than the threshold value, is calculated as a total value of signal beam power, and a total value of the measured values of the optical power, which are less then the threshold value, is calculated as a total value of ASE power. The number of the measured values of the optical power, which are equal to or larger than the threshold value, is calculated as a wavelength count of the signal beams contained in the wavelength multiplexing signal. A signal-to-ASE ratio is calculated from the total value of the signal beam power and the total value of the ASE power. The optical power of the wavelength multiplexing signal inputted to an optical amplifier is measured, and a target value of the automatic level control (ALC) is determined by use of the measured values of the wavelength count, the signal-to-ASE ratio and the optical power of the wavelength multiplexing signal in order to execute the ALC of the optical amplifier so that the optical power of each of the wavelengths in the wavelength multiplexing signal outputted from the optical amplifier, becomes constant.

    摘要翻译： 在光传输装置中，测定包含在波长多路复用信号中的各波长的光功率，将各波长的光功率的测量值与预定阈值进行比较，光功率的测量值的总和 被计算为信号光束功率的总值，并且计算小于阈值的光功率的测量值的总值作为总值，其等于或大于阈值 的ASE电力。 计算出等于或大于阈值的光功率的测量值的数量作为包含在波长复用信号中的信号光束的波长计数。 从信号光束功率的总值和ASE功率的总值计算信号到ASE比。 测量输入到光放大器的波长复用信号的光功率，并且通过使用波长计数，信号与ASE比和测量值的测量值来确定自动电平控制（ALC）的目标值 为了执行光放大器的ALC，使得从光放大器输出的波长复用信号中的每个波长的光功率变得恒定，所以波长多路复用信号的光功率变得恒定。

    Optical amplifier
    3.
    发明授权
    Optical amplifier 有权
    光放大器

    公开(公告)号：US08498045B2

    公开(公告)日：2013-07-30

    申请号：US12878253

    申请日：2010-09-09

    申请人： Tomoaki Takeyama

    发明人： Tomoaki Takeyama

    IPC分类号： H01S3/0915 ,  H01S3/094 ,  H01S3/067

    CPC分类号： H01S3/094023 ,  H01S3/005 ,  H01S3/0078 ,  H01S3/06712 ,  H01S3/06754 ,  H01S3/06766 ,  H01S3/094003 ,  H01S3/09415 ,  H01S3/1608 ,  H01S2301/02 ,  H04B10/294

    摘要： An optical amplifier includes a rare-earth doped optical fiber for receiving input light through one end and outputting output light through another end, the input light being input from an input port; an excitation light source for generating excitation light; an optical coupler for supplying the generated excitation light to the one end and/or the another end of the rare-earth doped optical fiber; and a reflector for reflecting an amplified spontaneous emission light out of a signal band traveling in opposite direction to the input light, the amplified spontaneous emission light being generated in the rare-earth doped optical fiber.

    摘要翻译： 光放大器包括：稀土掺杂光纤，用于通过一端接收输入光，并通过另一端输出输出光，输入光从输入端口输入; 用于产生激发光的激发光源; 用于将产生的激发光提供给稀土掺杂光纤的一端和/或另一端的光耦合器; 以及反射器，用于从与输入光相反的方向行进的信号带反射放大的自发发射光，在稀土掺杂光纤中产生放大的自发发射光。

    Optical amplifier
    4.
    发明授权
    Optical amplifier 有权
    光放大器

    公开(公告)号：US08351112B2

    公开(公告)日：2013-01-08

    申请号：US13017176

    申请日：2011-01-31

    申请人： Tomoaki Takeyama

    发明人： Tomoaki Takeyama

    IPC分类号： H01S3/00

    CPC分类号： H01S3/06758 ,  H01S3/1305 ,  H04B10/2941 ,  H04B10/296

    摘要： An optical amplifier includes a first amplification medium to receive light obtained by combining signal light input into an input port and the excitation light generated by a light source; a second amplification medium disposed between the first amplification medium and an output port; a loss medium to receive the signal light separated from light output from the first amplification medium; a variable optical attenuator that is disposed on a path that bypasses the loss medium, and to receive the excitation light separated from the light output from the first amplification medium; a first photodetector to detect power of light separated from the signal light transmitted from the second amplification medium; and a controller to control the amount of attenuation for the variable optical attenuator or output power of the light source so that signal light power per wavelength of the signal light becomes closer to a target value.

    摘要翻译： 光放大器包括：第一放大介质，用于接收通过将输入到输入端口的信号光与由光源产生的激发光组合而获得的光; 布置在第一放大介质和输出端口之间的第二放大介质; 用于接收与从第一放大介质输出的光分离的信号光的损耗介质; 可变光衰减器，其设置在绕过所述损耗介质的路径上，并接收与从所述第一放大介质输出的光分离的激发光; 第一光电检测器，用于检测与从第二放大介质传输的信号光分离的光的功率; 以及控制器，用于控制可变光衰减器的衰减量或光源的输出功率，使得信号光的每个波长的信号光功率变得更接近目标值。

    OPTICAL AMPLIFIER AND METHOD OF CONTROLLING THE SAME
    6.
    发明申请
    OPTICAL AMPLIFIER AND METHOD OF CONTROLLING THE SAME 有权
    光放大器及其控制方法

    公开(公告)号：US20080074731A1

    公开(公告)日：2008-03-27

    申请号：US11845335

    申请日：2007-08-27

    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 ,  H01S3/2316

    摘要： An optical amplifier reducing gain deviation caused by wavelength arrangement has a first-stage optical amplifying unit, an attenuator, a second-stage optical amplifying unit, an automatic gain controller controlling the first- and second-stage optical amplifying units so that a gain of signal light outputted from the second-stage optical amplifying unit to signal light inputted to the first-stage optical amplifying unit is constant, and an attenuation amount controller controlling an attenuation amount at the attenuator to adjust gain-versus-wavelength characteristic at the automatic-gain-controlled first- and second-stage optical amplifying units on the basis of information on wavelength arrangement and an input level of the signal light inputted to the first-stage optical amplifying unit so that gain slope characteristic at the first- and second-stage optical amplifying units due to the wavelength arrangement and the input level is flattened.

    摘要翻译： 降低由波长配置引起的增益偏差的光放大器具有第一级光放大单元，衰减器，第二级光放大单元，控制第一级和第二级光放大单元的自动增益控制器， 从第二级光放大单元输出的信号光信号是恒定的，并且衰减量控制器控制衰减器处的衰减量，以调节自动 - 基于波长配置的信息和输入到第一级光放大单元的信号光的输入电平，使得增益控制的第一级和第二级光放大单元在第一级和第二级的增益斜率特性 由于波长布置和输入电平而导致的光放大单元变平。

    Optical amplifier using delayed phase matching fiber
    8.
    发明授权
    Optical amplifier using delayed phase matching fiber 有权
    光放大器采用延迟相位匹配光纤

    公开(公告)号：US07136219B2

    公开(公告)日：2006-11-14

    申请号：US11094720

    申请日：2005-03-31

    申请人： Takashi Shimizu ,  Shinya Inagaki ,  Tomoaki Takeyama ,  Keiko Sasaki

    发明人： Takashi Shimizu ,  Shinya Inagaki ,  Tomoaki Takeyama ,  Keiko Sasaki

    IPC分类号： H01S3/00

    CPC分类号： H04B10/2941 ,  H01S3/0064 ,  H01S3/06708 ,  H01S3/0672 ,  H01S3/06729 ,  H01S3/06758 ,  H01S3/0677 ,  H01S3/094003 ,  H01S3/094023 ,  H01S3/0941 ,  H01S3/1301 ,  H01S3/1305 ,  H01S3/1608 ,  H01S2301/02

    摘要： The present invention has an object to provide an optical amplifier capable of realizing a good response characteristic in a wide frequency band, even when a population inversion state is formed by a pumping light supplied to an optical amplification medium and an ASE light generated in the optical amplification medium. To this end, in the optical amplifier according to the present invention, a delayed phase matching fiber in which a first fiber whose response speed is relatively low is arranged on the input side and a second fiber whose response speed is relatively high is arranged on the output side, is used as the optical amplification medium doped with a rare-earth element.

    摘要翻译： 本发明的目的是提供一种能够在宽频带中实现良好的响应特性的光放大器，即使当通过提供给光放大介质的泵浦光和在光学放大器中产生的ASE光形成群体反转状态时 扩增介质。 为此，在根据本发明的光放大器中，延迟相位匹配光纤，其中响应速度相对较低的第一光纤被布置在输入侧，并且响应速度相对较高的第二光纤被布置在 输出侧用作掺杂有稀土元素的光放大介质。

    Optical amplifying device and optical transmission system
    9.
    发明授权
    Optical amplifying device and optical transmission system 有权
    光放大装置及光传输系统

    公开(公告)号：US08922876B2

    公开(公告)日：2014-12-30

    申请号：US13598793

    申请日：2012-08-30

    申请人： Tomoaki Takeyama

    发明人： Tomoaki Takeyama

    IPC分类号： H01S3/10

    CPC分类号： H01S3/06754 ,  H01S3/1301 ,  H01S3/1608 ,  H01S2301/02

    摘要： An optical amplifying device includes an optical amplification medium configured to be excited by excitation light and amplify signal light, a light loss detector configured to detect a light loss of an optical component optically connected to the optical amplification medium in the amplifying device, and a noise figure deterioration detector configured to detect, based on the light loss detected by the light loss detector, deterioration of a noise figure of the optical amplification medium.

    摘要翻译： 一种光放大装置，包括配置为被激发光激发并放大信号光的光放大介质，光损失检测器，被配置为检测与放大装置中的光放大介质光学连接的光学部件的光损耗，以及噪声 图形劣化检测器，被配置为基于由光损失检测器检测到的光损失来检测光放大介质的噪声系数的劣化。