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    • 31. 发明授权
    • Information transmission network system and its traffic control method and node equipment
    • 信息传输网络系统及其流量控制方法和节点设备
    • US06917583B2
    • 2005-07-12
    • US09788593
    • 2001-02-21
    • Masatoshi Suzuki
    • Masatoshi Suzuki
    • H04J3/00H04J3/08H04J3/14H04L1/22H04Q11/04G01R31/08
    • H04J3/085H04J3/14H04J2203/006H04L1/22
    • In SDH-based transmission systems with redundancy, in the event of failure in the service transmission lines, before the service traffic communication path set in the service transmission lines is switched to the protection transmission lines, if there is a communication path for sub traffic set in the protection transmission lines, the AU-AIS signal is inserted at the exit to lower-tier terminals to terminate the sub traffic communication path. Unless there is a communication path set for sub traffic in the protection transmission lines, the UNEQ signal is inserted at the exit to lower-tier terminals which are substantially connected to the protection transmission lines to terminate the sub traffic communication path. Later, the service traffic communication path is switched to the protection transmission lines. Then a misconnect during redundancy lines switching is prevented and the possibility of leak of the service traffic transmission information is eliminated.
    • 在具有冗余的基于SDH的传输系统中,在服务传输线路发生故障的情况下,在服务传输线路中设置的服务业务通信路径切换到保护传输线路之前,如果存在用于子业务集的通信路径 在保护传输线路中,将AU-AIS信号插入到下层终端的出口,以终止子业务通信路径。 除非在保护传输线路中设置了用于子业务的通信路径,否则将UNEQ信号插入到基本连接到保护传输线路的下层终端的出口,以终止子业务通信路径。 之后,服务业务通信路径切换到保护传输线路。 然后,在冗余线路切换期间发生错误连接,并且消除了服务业务传输信息泄漏的可能性。
    • 33. 发明授权
    • Optical fiber transmission line
    • 光纤传输线
    • US06754420B2
    • 2004-06-22
    • US10056999
    • 2002-01-25
    • Takehiro TsuritaniKeiji TanakaNoboru EdagawaMasatoshi Suzuki
    • Takehiro TsuritaniKeiji TanakaNoboru EdagawaMasatoshi Suzuki
    • G02B602
    • H04B10/2525
    • An optical fiber transmission line for realizing satisfactory long haul transmission characteristics using two kinds of optical fibers. The optical fiber transmission line includes a plurality of local dispersion compensating spans, wide dispersion compensating spans disposed at predetermined intervals, and optical repeating amplifiers to connect each span. The local dispersion compensating span includes a first optical fiber with positive dispersion having an effective core area of 130 &mgr;m2 or more and a second optical fiber with a negative dispersion value of −50 ps/nm/km or less to transmit the light output from the first optical fiber. The wide dispersion compensating span consists of a third optical fiber having the same configuration and composition with the first optical fiber.
    • 一种用于使用两种光纤实现令人满意的长距离传输特性的光纤传输线。 光纤传输线包括多个局部色散补偿范围,以预定间隔设置的宽色散补偿跨度以及连接每个跨度的光学重复放大器。 局部色散补偿范围包括具有130μm或更大的有效核​​心面积的正色散的第一光纤和具有-50ps / nm / km或更小的负色散值的第二光纤传输光 从第一光纤输出。 宽色散补偿范围由具有与第一光纤具有相同配置和组成的第三光纤组成。
    • 38. 发明授权
    • Optical digital regenerator
    • 光学数字再生器
    • US06532091B1
    • 2003-03-11
    • US09246256
    • 1999-02-08
    • Tetsuya MiyazakiTomohiro OtaniMasatoshi SuzukiNoboru EdagawaShu Yamamoto
    • Tetsuya MiyazakiTomohiro OtaniMasatoshi SuzukiNoboru EdagawaShu Yamamoto
    • H04B1002
    • H04B10/299
    • An optical digital regenerator for digitally regenerating an input signal in an intact optical state. A first operating unit has a first probe light generator for generating a first probe light and a first optical operator for converting a waveform of the first probe light output from a first probe light generator according to an optical intensity waveform of the input signal light. A clock extractor extracts a clock component of the input signal light from a photocurrent generated by the first optical operator. A second optical operating unit has a second probe light generator for generating a second probe light pulsed in accordance with the clock output from the clock extractor and a second optical operator for sampling the second probe pulse light output from the second probe light generator.
    • 一种用于以完整光学状态数字再生输入信号的光学数字再生器。 第一操作单元具有用于产生第一探测光的第一探测光发生器和用于根据输入信号光的光强度波形转换从第一探测光发生器输出的第一探测光的波形的第一光学操作器。 时钟提取器从由第一光学运算器产生的光电流提取输入信号光的时钟分量。 第二光学操作单元具有第二探测光发生器,用于产生根据来自时钟提取器的时钟输出脉冲的第二探测光,以及第二光学操作器,用于对从第二探测光发生器输出的第二探测脉冲光进行采样。
    • 40. 发明授权
    • Optical modulating apparatus
    • 光调制装置
    • US6028695A
    • 2000-02-22
    • US124993
    • 1998-07-30
    • Aritomo UemuraTakashi MizuochiKatsuhiro ShimizuKiwami MatsushitaTadayoshi KitayamaMasatoshi SuzukiHidenori TagaShu Yamamoto
    • Aritomo UemuraTakashi MizuochiKatsuhiro ShimizuKiwami MatsushitaTadayoshi KitayamaMasatoshi SuzukiHidenori TagaShu Yamamoto
    • G02F1/03H04B10/07H04B10/516H04B10/54H04B10/548H04B10/58H04B10/61G02F1/035G02F1/055
    • G02F1/0327G02F2203/25
    • When an intensity modulating operation and a phase modulating operation are carried out by employing a 2-electrode MachZehnder type optical modulator preferably a LN-MZ type optical modulator, a drive signal of this 2-electrode LN-MZ type optical modulator is produced from an intensity modulation signal and a phase modulation signal with a low loss and a simple arrangement. A optical modulating apparatus includes a splitter/combiner structured to split an intensity modulation signal inputted into a first input terminal into a first electric signal having an in-phase relationship with that of the intensity modulation signal and second electric signal having an inverse phase relationship therewith, split a phase modulation signal inputted into a second input terminal into a third electric signal having an in-phase relationship with that of the phase modulation signal an also a fourth electric signal having an in-phase relationship therewith, combine the first electric signal with the fourth electric signal to thereby output a first combined signal, and combine the second electric signal with the third electric signal to thereby output a second combined signal; and an optical modulating means structured to split a light carrier wave entered from a light source into two light carrier waves, and to optically modulate the two sets of the split light carrier waves by using the first combined signal and the second combined signal derived from the splitter/combiner, and combine the two phase-modulated above said light carrier waves to output an optical modulation signal.
    • 当通过使用优选为LN-MZ型光调制器的2电极MachZehnder型光学调制器进行强度调制操作和相位调制操作时,该2电极LN-MZ型光调制器的驱动信号由 强度调制信号和具有低损耗和简单布置的相位调制信号。 光调制装置包括:分离器/组合器,被构造成将输入到第一输入端的强度调制信号分成与强度调制信号的同相关系的第一电信号和与其相反的相位关系的第二电信号 将输入到第二输入端子的相位调制信号分别成为与相位调制信号同相的同步关系的第三电信号,以及与其同相关系的第四电信号,将第一电信号与 第四电信号,从而输出第一组合信号,并将第二电信号与第三电信号组合,从而输出第二组合信号; 以及光调制装置,被构造成将从光源进入的光载波分成两个光载波,并且通过使用从第二组合信号导出的第一组合信号和第二组合信号对两组分裂光载波进行光学调制 分离器/组合器,并且组合在所述轻载波上的两个相位调制以输出光调制信号。