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    Optical modulator outputting an optical signal with a drive voltage signal dependent upon an input signal
    1.
    发明授权
    Optical modulator outputting an optical signal with a drive voltage signal dependent upon an input signal 有权
    光调制器输出具有取决于输入信号的驱动电压信号的光信号

    公开(公告)号：US06317249B1

    公开(公告)日：2001-11-13

    申请号：US09455021

    申请日：1999-12-06

    申请人： Hiroshi Nakamoto ,  Takao Naito ,  Kazunori Hayami ,  Shinji Sonoda

    发明人： Hiroshi Nakamoto ,  Takao Naito ,  Kazunori Hayami ,  Shinji Sonoda

    IPC分类号： G02F101

    CPC分类号： H04B10/588 ,  G02F1/0123 ,  G02F2001/212 ,  H04B10/50575 ,  H04B10/564

    摘要： The present invention relates to an optical transmitter and particularly to an optical transmitter including an external optical modulator such as Mach-Zehnder type optical modulator which modulates the light from a light source to output an optical signal with a drive voltage signal generated depending on an input signal According to the present invention is achieved by providing an optical modulator, which add weighting to operating point control signal in accordance with optical output level of the modulator.

    摘要翻译： 光发射机技术领域本发明涉及一种光发射机，特别涉及一种光发射机，其包括诸如马赫 - 曾德尔型光调制器的外部光调制器，其调制来自光源的光以根据输入产生的驱动电压信号输出光信号 信号根据本发明，通过提供一种根据调制器的光输出电平对工作点控制信号加权的光调制器来实现。

    Raman amplifier utilizing pump modulation for expanding gain band width
    2.
    发明授权
    Raman amplifier utilizing pump modulation for expanding gain band width 有权
    拉曼放大器利用泵调制扩大增益带宽

    公开(公告)号：US07379233B2

    公开(公告)日：2008-05-27

    申请号：US10715141

    申请日：2003-11-18

    申请人： Hiroshi Nakamoto ,  Takao Naito ,  Kenichi Torii ,  Toshiki Tanaka

    发明人： Hiroshi Nakamoto ,  Takao Naito ,  Kenichi Torii ,  Toshiki Tanaka

    IPC分类号： H04B10/17

    CPC分类号： H04B10/2916 ,  H01S3/094076 ,  H01S3/094096 ,  H01S3/1022 ,  H01S3/302 ,  H04B2210/003

    摘要： A plurality of pump light sources generate plural variations of pump light having different frequencies. A modulation circuit intensity-modulates the plural variations of pump light in the predetermined periods, respectively. A pump light pair whose frequency difference equals a Raman shift frequency are modulated such that they cannot simultaneously enters an emission state. A wavelength-multiplexer wavelength-multiplexes the plural variations of pump light modulated by the modulation circuit. A optical guide device guides the plural variations of pump light wavelength-multiplexed by the wavelength-multiplexer to an optical fiber.

    摘要翻译： 多个泵浦光源产生具有不同频率的泵浦光的多个变化。 调制电路分别在预定时段内对泵浦光的多个变化进行强度调制。 频率差等于拉曼位移频率的泵浦灯对被调制成不能同时进入发射状态。 波长多路复用器对由调制电路调制的泵浦光的多个变化进行波长多路复用。 光导装置将由波长多路复用器波长多路复用的泵浦光的多种变化引导到光纤。

    Optical sending apparatus and channel extension method
    4.
    发明授权
    Optical sending apparatus and channel extension method 失效
    光发送装置和信道扩展方法

    公开(公告)号：US06738181B1

    公开(公告)日：2004-05-18

    申请号：US09650856

    申请日：2000-08-29

    申请人： Hiroshi Nakamoto ,  Takao Naito ,  Terumi Chikama

    发明人： Hiroshi Nakamoto ,  Takao Naito ,  Terumi Chikama

    IPC分类号： H04B1012

    CPC分类号： H04B10/2525 ,  G02B6/2713 ,  G02B6/276 ,  G02B6/29376 ,  H04B10/506 ,  H04B2210/254

    摘要： An optical sending apparatus of this invention includes a plurality of optical signal generating sections, a dispersion compensating section and a wavelength multiplexing section. The dispersion compensating section performs compensation with a predetermined chromatic dispersion value to at least one of polarized light generated by the optical signal generating sections while a predetermined state of polarized light is maintained. The wavelength multiplexing section combines output light outputted from the optical signal generating section with output light passing through the dispersion compensating section so that the polarized light of adjacent wavelengths crosses orthogonal to each other. The optical sending apparatus having such a construction can generate high-density WDM optical signals, the dispersion of which is compensated in advance, by a polarization crossing method.

    摘要翻译： 本发明的光发送装置包括多个光信号产生部分，色散补偿部分和波长复用部分。 色散补偿部在保持预定的偏振光状态的同时，对由光信号产生部产生的偏振光中的至少一个进行预定的色散值的补偿。 波长复用部将从光信号生成部输出的输出光与通过色散补偿部的输出光组合，使得相邻波长的偏振光彼此正交交叉。 具有这种结构的光发送装置可以通过偏振交叉方法产生高分散的WDM光信号，其偏差被预先补偿。

    Quality monitoring method and apparatus for wavelength division multiplexed optical signal and optical transmission system using the same
    5.
    发明授权
    Quality monitoring method and apparatus for wavelength division multiplexed optical signal and optical transmission system using the same 有权
    用于波分复用光信号和使用其的光传输系统的质量监测方法和装置

    公开(公告)号：US07400830B2

    公开(公告)日：2008-07-15

    申请号：US10806330

    申请日：2004-03-23

    申请人： Kenichi Torii ,  Takao Naito ,  Hiroshi Nakamoto ,  Toru Katagiri

    发明人： Kenichi Torii ,  Takao Naito ,  Hiroshi Nakamoto ,  Toru Katagiri

    IPC分类号： H04B10/08

    CPC分类号： H04B10/07953

    摘要： The present invention has an object to provide a technology for monitoring the quality of a WDM signal light, capable of quickly and accurately judging an occurrence of quality deterioration of signal light and a deterioration factor thereof. To this end, according to a quality monitoring apparatus of WDM signal light of the present invention, a part of the WDM signal light being propagated through an optical transmission path is branched as a monitor light, a signal light of one wavelength contained in the monitor light is selected as a channel to be measured. Then, the frequency of occurrences of bit error for the channel to be measured is repeatedly measured for a plurality of times, and whether or not the signal quality is deteriorated is judged, together with the deterioration factor based on the measurement results, and a control signal light for adjusting the signal light power according to the judgment result is transmitted to the optical transmission path, to achieve the improvement of a characteristic of the WDM signal light.

    摘要翻译： 本发明的目的是提供一种用于监视WDM信号光的质量的技术，其能够快速且准确地判断信号光的质量劣化的发生及其劣化因素。 为此，根据本发明的WDM信号光的质量监视装置，通过光传输路径传播的WDM信号光的一部分被分支为监视光，监视器中包含一个波长的信号光 选择光作为待测量的通道。 然后，重复地测量要测量的通道的位错误的发生频率，并且判断信号质量是否劣化，以及基于测量结果的劣化因子以及控制 将根据判断结果调整信号光功率的信号光发送到光传输路径，以实现WDM信号光的特性的提高。

    Raman amplifier
    6.
    发明申请
    Raman amplifier 有权
    拉曼放大器

    公开(公告)号：US20050063043A1

    公开(公告)日：2005-03-24

    申请号：US10715141

    申请日：2003-11-18

    申请人： Hiroshi Nakamoto ,  Takao Naito ,  Kenichi Torii ,  Toshiki Tanaka

    发明人： Hiroshi Nakamoto ,  Takao Naito ,  Kenichi Torii ,  Toshiki Tanaka

    IPC分类号： G02F1/35 ,  H01S3/30 ,  H01S3/00

    CPC分类号： H04B10/2916 ,  H01S3/094076 ,  H01S3/094096 ,  H01S3/1022 ,  H01S3/302 ,  H04B2210/003

    摘要： A plurality of pump light sources generate plural variations of pump light having different frequencies. A modulation circuit intensity-modulates the plural variations of pump light in the predetermined periods, respectively. A pump light pair whose frequency difference equals a Raman shift frequency are modulated such that they cannot simultaneously enters an emission state. A wavelength-multiplexer wavelength-multiplexes the plural variations of pump light modulated by the modulation circuit. A optical guide device guides the plural variations of pump light wavelength-multiplexed by the wavelength-multiplexer to an optical fiber.

    摘要翻译： 多个泵浦光源产生具有不同频率的泵浦光的多个变化。 调制电路分别在预定时段内对泵浦光的多个变化进行强度调制。 频率差等于拉曼位移频率的泵浦灯对被调制成不能同时进入发射状态。 波长多路复用器对由调制电路调制的泵浦光的多个变化进行波长多路复用。 光导装置将由波长多路复用器波长多路复用的泵浦光的多种变化引导到光纤。

    Systems and methods for multi-domain routing
    9.
    发明授权
    Systems and methods for multi-domain routing 有权
    多域路由的系统和方法

    公开(公告)号：US08750127B2

    公开(公告)日：2014-06-10

    申请号：US12751656

    申请日：2010-03-31

    申请人： Qiong Zhang ,  Mohammad Masud Hasan ,  Xi Wang ,  Paparao Palacharla ,  Takao Naito ,  Fredrick S. Gruman

    发明人： Qiong Zhang ,  Mohammad Masud Hasan ,  Xi Wang ,  Paparao Palacharla ,  Takao Naito ,  Fredrick S. Gruman

    IPC分类号： H04L1/00 ,  H04L12/26 ,  H04L12/56

    CPC分类号： H04L45/12 ,  H04L45/00 ,  H04L45/02 ,  H04L45/04 ,  H04L45/126 ,  H04L45/128 ,  H04L45/22 ,  H04L45/28

    摘要： Systems and methods for multi-domain routing are provided. In some embodiments, a method for determining a path calculation from a source node to a destination node over a multi-domain network is provided. The method may include steps for receiving a predetermined sequence of domains for communicating information from the source node to the destination node, determining a link type for each of a plurality of links in the predetermined sequence of domains, modifying the link type of one or more of the plurality of links such that the plurality of links are unidirectional links towards a destination node, and determining a path along the predetermined sequence of domains based on the modified plurality of links.

    摘要翻译： 提供了多域路由的系统和方法。 在一些实施例中，提供了一种用于确定通过多域网络从源节点到目的地节点的路径计算的方法。 该方法可以包括用于接收用于将信息从源节点传送到目的地节点的预定的域序列的步骤，为预定的域序列中的多个链路中的每一个确定链路类型，修改一个或多个链路类型 所述多个链路使得所述多个链路是朝向目的地节点的单向链路，以及基于所述修改的多个链路来确定沿着所述预定的域序列的路径。

    Systems and methods for determining protection paths in a multi-domain network
    10.
    发明授权
    Systems and methods for determining protection paths in a multi-domain network 有权
    用于确定多域网络中的保护路径的系统和方法

    公开(公告)号：US08681634B2

    公开(公告)日：2014-03-25

    申请号：US12751599

    申请日：2010-03-31

    申请人： Qiong Zhang ,  Mohammad Masud Hasan ,  Xi Wang ,  Paparao Palacharla ,  Takao Naito ,  Fredrick S. Gruman

    发明人： Qiong Zhang ,  Mohammad Masud Hasan ,  Xi Wang ,  Paparao Palacharla ,  Takao Naito ,  Fredrick S. Gruman

    IPC分类号： H04L12/26

    CPC分类号： H04L45/04 ,  H04L45/128 ,  H04L45/22 ,  H04L45/24 ,  H04L45/28

    摘要： Systems and methods for determining multiple paths in a multi-domain network are provided. In some embodiments, a method for determining multiple paths in a network is provided. The method may include determining a first path between a source node and a destination node and determining a second path disjoint from the first path. In some embodiments, to determine the second path includes determining which ingress nodes are available in a domain that includes the destination node, where the available ingress nodes are not part of the first path, and implementing a disjoint path algorithm for each of the available ingress nodes. To determine the first path includes implementing forward path calculations.

    摘要翻译： 提供了用于确定多域网络中的多个路径的系统和方法。 在一些实施例中，提供了一种用于确定网络中的多个路径的方法。 该方法可以包括确定源节点和目的地节点之间的第一路径并确定与第一路径不相交的第二路径。 在一些实施例中，为了确定第二路径包括确定哪些入口节点在包括目的地节点的域中是可用的，其中可用入口节点不是第一路径的一部分，并且为每个可用入口实现不相交路径算法 节点。 确定第一条路径包括实现前向路径计算。