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    • 4. 发明申请
    • WAVELENGTH SELECTIVE SWITCH AND OPTICAL TRANSMISSION APPARATUS
    • 波长选择开关和光传输装置
    • US20120237219A1
    • 2012-09-20
    • US13409813
    • 2012-03-01
    • Hiroki OOI
    • Hiroki OOI
    • H04J14/02G02B6/26
    • H04Q11/0005H04J14/0204H04J14/0209H04J14/0212H04J14/026H04Q2011/0016H04Q2011/0075
    • A wavelength selective switch includes a wavelength dispersing element, a wavelength converging element, multiple transmission control elements, and a controller. The wavelength dispersing element performs wavelength dispersion of input signal light. The transmission control element divides input signal light into wavelength bands within a channel band and transmits or cuts off the divided input signal light. The wavelength converging element converges signal light having respective wavelengths produced from the transmission control elements for output. The controller controls a transmittance of the transmission control element of at least one of the low and high frequency sides in a channel band. The wavelength selective switch sets as a cutoff band at least one of predetermined bands on the low and high frequency sides, narrows a transmission band of the input signal light to be wavelength-multiplexed, deletes an overlapped band of optical spectra, and outputs the transmission signal light, thereby suppressing crosstalk.
    • 波长选择开关包括波长分散元件,波长会聚元件,多个传输控制元件和控制器。 波长分散元件进行输入信号光的波长色散。 传输控制元件将输入信号光分成通道频带内的波段,并传输或切断划分的输入信号光。 波长会聚元件会收敛由传输控制元件产生的各波长的信号光,以进行输出。 控制器控制通道频带中的低频侧和高频侧中的至少一个的发送控制元件的透射率。 波长选择开关将低频侧和高频侧的预定频带中的至少一个设定为截止频带,使波长多路复用的输入信号光的发送频带变窄,从而删除重叠的光谱带,并输出发送 信号光,从而抑制串扰。
    • 7. 发明申请
    • OPTICAL TRANSMISSION APPARATUS, WAVELENGTH DIVISION MULTIPLEXING OPTICAL COMMUNICATION SYSTEM AND OPTICAL TRANSMISSION METHOD
    • 光学传输装置,波长分割多路复用光通信系统和光传输方法
    • US20100221013A1
    • 2010-09-02
    • US12688137
    • 2010-01-15
    • Hiroki OOIHiroshi OnakaGeorge Ishikawa
    • Hiroki OOIHiroshi OnakaGeorge Ishikawa
    • H04J14/02H04B10/02H04B10/18
    • H04B10/2557H04J14/02
    • An optical transmission apparatus for suppressing deterioration of transmission quality due to XPM in a wavelength division multiplexing optical communication system in which an intensity modulation optical signal and a phase modulation optical signal exist in a mixed form. The apparatus has an intensity inversion signal light output section which outputs light having an intensity pattern obtained by inverting intensity changes of the intensity modulation optical signal near a wavelength of the intensity modulation optical signal in arrangement on wavelength axis of optical wavelengths that can be multiplexed as a wavelength division multiplexed signal as intensity inversion signal light, and a wavelength division multiplexed optical signal output unit which wavelength-division-multiplexes the intensity modulation optical signal, the phase modulation optical signal and light from the intensity inversion signal light output section and outputs a wavelength division multiplexed optical signal.
    • 一种光传输装置,用于在混合形式存在强度调制光信号和相位调制光信号的波分复用光通信系统中抑制由XPM导致的传输质量的恶化。 该装置具有强度反转信号光输出部,其输出具有通过将强度调制光信号的波长附近的强度调制光信号的强度变化反转的强度图形输出的光配置在可以多路复用的光波长的波长轴上 波分多路复用信号作为强度反转信号光,以及波分复用光信号输出单元,其对强度调制光信号,相位调制光信号和强度反转信号光输出部分的光进行波分复用,并输出 波分复用光信号。
    • 8. 发明申请
    • OPTICAL TRANSMISSION SYSTEM AND METHOD FOR CHROMATIC DISPERSION COMPENSATION
    • 用于色散补偿的光传输系统和方法
    • US20090238571A1
    • 2009-09-24
    • US12405582
    • 2009-03-17
    • Kentaro NAKAMURAHiroki OOIGeorge Ishikawa
    • Kentaro NAKAMURAHiroki OOIGeorge Ishikawa
    • H04J14/02
    • H04B10/25133H04B10/07951H04J14/021H04J14/0227H04J14/0246H04J14/0256H04J14/026H04J14/0279
    • An optical transmission system including an optical transmission path for transmitting WDM signals multiplexed different wavelength optical signals, the WDM signals including different bit rate optical signals or different modulation format optical signals; a repeater arranged in the optical transmission path, the repeater including a chromatic dispersion compensation unit for compensating chromatic dispersion compensation for the WDM signals; and a network management system including processes of determining a dispersion compensation ratio indicating the ratio with respect to the dispersion compensation amount at which the residual dispersion of the WDM signals are zero after transmission via the optical transmission path, on the bases of the mixture ratio of different optical signals included in the WDM signals, and variably setting the dispersion compensation amount for the in-line repeater according to the dispersion compensation ratio.
    • 一种光传输系统,包括用于传输复用的不同波长光信号的WDM信号的光传输路径,所述WDM信号包括不同的比特率光信号或不同调制格式的光信号; 布置在所述光传输路径中的中继器,所述中继器包括用于补偿所述WDM信号的色散补偿的色散补偿单元; 以及网络管理系统,其包括以下步骤的处理:基于所述混合比率,确定相对于所述WDM信号的残留色散为零的色散补偿量的比率的色散补偿比, 包括在WDM信号中的不同的光信号,并且根据色散补偿比可变地设置用于同时中继器的色散补偿量。
    • 9. 发明申请
    • DISPERSION COMPENSATION CONTROLLING APPARATUS AND METHOD FOR SEARCHING FOR AMOUNT OF DISPERSION CONTROL
    • 分散补偿控制装置和搜索分散控制量的方法
    • US20090080902A1
    • 2009-03-26
    • US12329095
    • 2008-12-05
    • Kiyotoshi NOHEJIHiroki OOI
    • Kiyotoshi NOHEJIHiroki OOI
    • H04B10/00
    • H04B10/2513H04B10/25133
    • In order to enhance dispersion control, the apparatus includes a dispersion controller; a quality index generator generating a quality index representing a quality of an optical signal output from the dispersion controller; and a searching unit searching for an amount of dispersion control applying to the dispersion controller which amount optimizes the quality index, wherein the searching unit includes a splitting-half searching unit roughly searching, in a splitting half method, a range in which dispersion is controllable by the dispersion controller for an amount of dispersion control such that the quality index generated by the quality index generator becomes preferable, and a sweep searching unit thoroughly searching, by sweeping, a limited range based on the amount of dispersion searched by the splitting-half searching unit for an amount of dispersion control that optimizes the quality index generated by the quality index generator.
    • 为了增强色散控制,该装置包括一个色散控制器; 产生表示从色散控制器输出的光信号的质量的质量指标的质量指标生成器; 以及搜索单元,搜索应用于色散控制器的色散控制量,该量的质量优化质量指标,其中搜索单元包括分割半搜索单元,以分割半方法粗略地搜索色散可控制的范围 通过色散控制器进行色散控制量,使得由质量指标发生器产生的质量指标变得优选,并且扫描检索单元通过扫描基于分割半径搜索的色散量的有限范围彻底地搜索 搜索单元获得用于优化质量指标生成器产生的质量指标的色散控制量。