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55 条记录 (耗时 0.023 秒)

    Optical amplifier
    1.
    发明授权
    Optical amplifier 有权
    光放大器

    公开(公告)号：US07236294B2

    公开(公告)日：2007-06-26

    申请号：US11069015

    申请日：2005-03-02

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

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

    IPC分类号： H01S3/00

    CPC分类号： H01S3/06754 ,  H01S3/10015 ,  H01S3/10023 ,  H01S3/1301 ,  H01S3/1608 ,  H01S2301/04 ,  H04B10/2941

    摘要： A contrivance, if a WDM signal state changes, is to improve an optical transmission quality by compensating gain flatness. A first excitation control unit sets a first optical pumping light source unit to emit excitation power needed to get the same amplifying operating level of a first amplifying medium as at the time of a maximum wavelength count when allocating wavelengths after a change in wavelength count at an equal interval in a wavelength range. A wavelength allocation bias estimation unit compares a present monitor value of optical power after outputting of a gain equalizer 13 with wavelength equi-allocation power associated with the recognized wavelength count, and thus estimates a wavelength allocation bias occurred as a concomitant of the change in the wavelength count. A primary gradient calculation unit obtains a primary gradient quantity defines as a gain deviation from the wavelength allocation bias. A second excitation control unit sets, in a second optical pumping light source unit, the excitation power needed to cancel the primary gradient quantity. An attenuation quantity control unit controls a variable optical attenuator to fix a gain by compensating an amount of change in the sum of gains.

    摘要翻译： 如果WDM信号状态改变，设计是通过补偿增益平坦度来提高光传输质量。 第一激励控制单元设置第一光泵浦光源单元以发射激励功率，以在波长计数变化之后分配波长时发射与最大波长计数时相同的放大工作电平。 波长范围相等的间隔。 波长分配偏差估计单元将增益均衡器13输出后的光功率的当前监视值与识别的波长计数相关联的波长等分配功率进行比较，从而估计发生的波长分配偏差，伴随着 波长计数。 主梯度计算单元获得主坡度量定义为与波长分配偏差的增益偏差。 第二激励控制单元在第二光泵浦光源单元中设置取消主梯度量所需的激励功率。 衰减量控制单元通过补偿增益之和的变化量来控制可变光衰减器来固定增益。

    Optical amplifier
    3.
    发明申请
    Optical amplifier 有权
    光放大器

    公开(公告)号：US20050146782A1

    公开(公告)日：2005-07-07

    申请号：US11069015

    申请日：2005-03-02

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

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

    IPC分类号： H01S3/00 ,  H01S3/067 ,  H01S3/07 ,  H01S3/10 ,  H01S3/131 ,  H01S3/16

    CPC分类号： H01S3/06754 ,  H01S3/10015 ,  H01S3/10023 ,  H01S3/1301 ,  H01S3/1608 ,  H01S2301/04 ,  H04B10/2941

    摘要： A contrivance, if a WDM signal state changes, is to improve an optical transmission quality by compensating gain flatness. A first excitation control unit sets a first optical pumping light source unit to emit excitation power needed to get the same amplifying operating level of a first amplifying medium as at the time of a maximum wavelength count when allocating wavelengths after a change in wavelength count at an equal interval in a wavelength range. A wavelength allocation bias estimation unit compares a present monitor value of optical power after outputting of a gain equalizer 13 with wavelength equi-allocation power associated with the recognized wavelength count, and thus estimates a wavelength allocation bias occurred as a concomitant of the change in the wavelength count. A primary gradient calculation unit obtains a primary gradient quantity defines as a gain deviation from the wavelength allocation bias. A second excitation control unit sets, in a second optical pumping light source unit, the excitation power needed to cancel the primary gradient quantity. An attenuation quantity control unit controls a variable optical attenuator to fix a gain by compensating an amount of change in the sum of gains.

    摘要翻译： 如果WDM信号状态改变，设计是通过补偿增益平坦度来提高光传输质量。 第一激励控制单元设置第一光泵浦光源单元以发射激励功率，以在波长计数变化之后分配波长时发射与最大波长计数时相同的放大工作电平。 波长范围相等的间隔。 波长分配偏差估计单元将增益均衡器13输出后的光功率的当前监视值与识别的波长计数相关联的波长等分配功率进行比较，从而估计发生的波长分配偏差，伴随着 波长计数。 主梯度计算单元获得主坡度量定义为与波长分配偏差的增益偏差。 第二激励控制单元在第二光泵浦光源单元中设置取消主梯度量所需的激励功率。 衰减量控制单元通过补偿增益之和的变化量来控制可变光衰减器来固定增益。

    Optical amplifier using delayed phase matching fiber
    6.
    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 AMPLIFIER
    10.
    发明申请
    OPTICAL AMPLIFIER 失效
    光放大器

    公开(公告)号：US20060087723A1

    公开(公告)日：2006-04-27

    申请号：US11045221

    申请日：2005-01-31

    申请人： Tomoaki Takeyama ,  Shinya Inagaki ,  Keiko Sasaki

    发明人： Tomoaki Takeyama ,  Shinya Inagaki ,  Keiko Sasaki

    IPC分类号： H01S3/00

    CPC分类号： H01S3/06758 ,  H01S3/0064 ,  H01S3/0078 ,  H01S3/06766 ,  H01S3/0677 ,  H01S3/0941 ,  H01S3/10069 ,  H01S3/1301 ,  H01S3/1305 ,  H01S3/1608 ,  H01S2301/02 ,  H01S2301/04 ,  H04B10/296 ,  H04B2210/003

    摘要： An optical amplifier of the invention comprises first and second optical amplification sections connected in a cascade manner between an input terminal and an output terminal. Optical isolators which block C-band ASE travelling in an opposite direction to L-band signal light, are inserted on the amplification medium of each of the optical amplification sections. A constant gain control section calculates the number of wavelengths based on the input power of signal light, and controls the pumping light power of each optical amplification section at a constant slope with respect to the number of wavelengths, so that the respective gains in the optical amplification sections corresponding to the number of wavelengths each become constant. As a result, it is possible to maintain flat gain wavelength characteristics even when receiving input of WDM light where the number of wavelengths varies rapidly over a wide range.

    摘要翻译： 本发明的光放大器包括在输入端和输出端之间以级联方式连接的第一和第二光放大部分。 将在与L波段信号光相反的方向上行进的C波段ASE的光隔离器插入每个光放大部分的放大介质上。 恒定增益控制部分根据信号光的输入功率来计算波长数，并且以相对于波长数量的恒定斜率控制每个光放大部分的泵浦光功率，使得光学部件 与波长数对应的放大部分各自变为恒定。 结果，即使当接收波长数量在宽范围内快速变化的WDM光的输入时，也可以保持平坦的增益波长特性。