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    • 54. 发明授权
    • Raman amplifier and optical transmission system using the same
    • 拉曼放大器和光传输系统使用相同
    • US07242519B2
    • 2007-07-10
    • US10812104
    • 2004-03-30
    • Kenichi ToriiTakao NaitoToshiki TanakaMasahiro Yuki
    • Kenichi ToriiTakao NaitoToshiki TanakaMasahiro Yuki
    • H04B10/17
    • H01S3/302H01S3/094096
    • It is an object of the present invention to provide a Raman amplifier capable of easily reducing the wavelength deviation of a Raman gain while suppressing system performance degradation, and an optical transmission system using such a Raman amplifier. To this end, the Raman amplifier of the present invention supplies, to an amplification medium, first pumping lights arranged at equal wavelength spacing in a signal light wavelength band, which is shifted to a shorter wavelength side in accordance with a Raman shift frequency, and second pumping lights arranged in a wavelength band on a shorter wavelength side and a longer wavelength side than a wavelength band of the first pumping lights, the wavelength and power of which are set so that peak wavelength spacing of the Raman gain in the signal light wavelength band is substantially equal to each other, to Raman amplifies a WDM signal light, and reduces the wavelength deviation of power of the WDM signal light by using a gain equalizer having the periodicity corresponding to the peak wavelength spacing of the Raman gain.
    • 本发明的目的是提供一种能够在抑制系统性能劣化的同时,容易地降低拉曼增益的波长偏差的拉曼放大器,以及使用这样的拉曼放大器的光传输系统。 为此,本发明的拉曼放大器向放大媒体提供按照拉曼位移频率向短波长侧移动的信号光波长带中的等距波长间隔配置的第一泵浦光,以及 第二泵浦光布置在比第一泵浦光的波长带更短波长侧和较长波长侧的波长带中,其波长和功率被设置为使得信号光波长中的拉曼增益的峰值波长间隔 通过使用具有对应于拉曼增益的峰值波长间隔的周期的增益均衡器,拉曼放大WDM信号光,并降低WDM信号光的功率波长偏差。
    • 56. 发明申请
    • Optical switch and network system including the same
    • 光开关和网络系统包括相同
    • US20050213971A1
    • 2005-09-29
    • US10914220
    • 2004-08-10
    • Kouichirou AmemiyaTakao NaitoToshiki Tanaka
    • Kouichirou AmemiyaTakao NaitoToshiki Tanaka
    • H04L12/44H04J14/02H04Q11/00H04J14/00
    • H04J14/0227H04J14/0221H04J14/0267H04J14/0269H04J14/0284H04L45/12H04L45/48H04L45/62H04Q11/0062H04Q2011/0073
    • The optical switch, having a plurality of ports capable of switching optical signal routes in a network in the form of light, includes a detection means for detecting information in regard to the transmission condition of an optical signal passing through each port; and a control means for exchanging the transmission condition information between each switch and controlling the ports, so as to select one route from among a plurality of routes transmitting the optical signal based on the difference of transmission condition information between the relevant switches. The transmission condition information is the power of the optical signal. When the difference between each switch exists, or when at least one switch intervenes in the middle of the transmission route, by selecting a transmission route which minimizes accumulated differences among the switches, configuring a tree structure conventionally performed through manual operation can be set automatically in an optical network system.
    • 具有能够以光的形式在网络中切换光信号路径的多个端口的光开关包括检测装置,用于检测通过每个端口的光信号的发送状态的信息; 以及控制装置,用于在每个交换机之间交换传输条件信息并控制端口,以便基于相关交换机之间的传输条件信息的差异,从发送光信号的多个路由中选择一个路由。 发送条件信息是光信号的功率。 当存在每个开关之间的差异时,或者当至少一个开关插入在传输路由的中间时,通过选择使开关之间的累积差异最小化的传输路由,可以自动设置通过手动操作常规执行的树结构 光网络系统。
    • 57. 发明授权
    • Numerical control drive system
    • 数控驱动系统
    • US06724167B1
    • 2004-04-20
    • US09980713
    • 2001-12-05
    • Toshiki Tanaka
    • Toshiki Tanaka
    • G05B1918
    • G05B19/4062G05B19/406G05B19/416G05B19/4163G05B2219/37342G05B2219/42284G05B2219/42289G05B2219/43068G05B2219/43199
    • In a numerical control system of the invention, a motor drive power converter 1a comprises input current determination means 12 for comparing an input current found by input current detection means 11 with an allowable current value with respect to less-than, equal-to, or greater-than relation, and acceleration/deceleration command change signal output means 13 for outputting a control signal to a drive unit 2a, 3a based on the determination result of the input current determination means 12. If the input current determination means 12 determines that input current Ii> allowable current value I0, acceleration/deceleration command generation means 15a, 15b of the drive unit 2a, 3a changes an acceleration/deceleration command (lessens the inclination of a speed command), thereby lowering the input current Ii.
    • 在本发明的数控系统中,电机驱动功率转换器1a包括输入电流确定装置12,用于将由输入电流检测装置11获得的输入电流与容许电流值相对于小于,等于或等于 大于关系,以及加速/减速指令改变信号输出装置13,用于根据输入电流确定装置12的确定结果向驱动单元2a,3a输出控制信号。如果输入电流确定装置12确定输入 电流Ii>允许电流值I0,驱动单元2a,3a的加速/减速命令产生装置15a,15b改变加速/减速命令(减小速度指令的倾斜度),从而降低输入电流Ii。
    • 58. 发明授权
    • Raman amplifier and optical transmission system using the amplifier
    • 拉曼放大器和使用放大器的光传输系统
    • US06639715B2
    • 2003-10-28
    • US09935575
    • 2001-08-24
    • Takao NaitoToshiki Tanaka
    • Takao NaitoToshiki Tanaka
    • H01S300
    • H01S3/302H01S3/06754H01S3/094096H01S2301/04
    • A plurality of pump lights are appropriately located in a wavelength band &lgr;1 to &lgr;3. The width of the wavelength band &lgr;1 to &lgr;3 is wider than a Raman shift amount. Gain is obtained in a wavelength band &lgr;2 to &lgr;3 by the plurality of pump lights located in the wavelength band &lgr;1 to &lgr;2. Gain is obtained in a wavelength band &lgr;3 to &lgr;4 by the plurality of pump lights located in the wavelength band &lgr;2 to &lgr;3. As a result, gain can be obtained in a wavelength band &lgr;2 to &lgr;4. A plurality of signal lights are located in the wavelength band &lgr;2 to &lgr;4. The deviation of gain can be adjusted by controlling the power of each of the plurality of pump lights.
    • 多个泵浦光适当地位于λ1至λ3的波段中。 波长带λ1至λ3的宽度比拉曼移位量宽。 通过位于波长带λ1至λ2的多个泵浦光,在λ2至λ3的波长带中获得增益。 通过位于波长带λ2至λ3的多个泵浦光,在λ3至λ4的波长带中获得增益。 结果,可以在λ2至λ4的波长带中获得增益。 多个信号光位于波长带λ2至λ4中。 可以通过控制多个泵浦灯中的每一个的功率来调节增益的偏差。
    • 59. 发明授权
    • Insulator composition, insulator paste and laminated electronic part
    • 绝缘子组合物,绝缘子糊和层压电子部件
    • US06444598B1
    • 2002-09-03
    • US09656362
    • 2000-09-06
    • Hiromichi KawakamiToshiki Tanaka
    • Hiromichi KawakamiToshiki Tanaka
    • C03C3062
    • C03C3/062C03C3/078C03C3/087C03C3/091C03C4/16C03C8/22C03C10/00C03C12/00C03C14/006H05K1/0306
    • An insulator composition which can be sintered at a relatively low temperature and which exhibits a low dielectric constant and a thermal expansion coefficient suitable for forming an insulator layer of a laminated electronic part contains a crystallized glass composition containing SiO2, MgO and CaO as main components, and Al2O3, an amorphous silicate glass composition, and a ceramic composition. The composition ratio by weight % (SiO2, MgO, CaO) of the main components of the crystallized glass composition lies in a region surrounded by point A (30, 25, 45), point B (30, 5, 65), point C (45, 5, 50) and point D (45, 25, 30) shown in a ternary composition diagram thereof. The thermal expansion coefficient of the insulator composition after sintering can easily be changed by changing the content ratio of the crystallized glass composition, the amorphous silicate glass composition and the ceramic composition.
    • 可以在比较低的温度下烧结并且表现出低介电常数和适于形成层压电子部件的绝缘体层的热膨胀系数的绝缘体组合物含有以SiO 2,MgO和CaO为主要成分的结晶玻璃组合物, 和Al 2 O 3,无定形硅酸盐玻璃组合物和陶瓷组合物。 结晶玻璃组合物的主要组分的组成比(SiO 2,MgO,CaO)位于由点A(30,25,45),点B(30,5,65),点C (45,5,50)和点D(45,25,30),其三元组成图示出。 通过改变结晶玻璃组合物,无定形硅酸盐玻璃组合物和陶瓷组合物的含量比,容易地改变烧结后的绝缘体组合物的热膨胀系数。
    • 60. 发明授权
    • Wavelength division multiplexing optical transmission system
    • 波分复用光传输系统
    • US06324317B1
    • 2001-11-27
    • US09451439
    • 1999-11-30
    • Toshiki TanakaTakao Naito
    • Toshiki TanakaTakao Naito
    • G02B602
    • H04B10/25253
    • An object of the present invention is to provide a WDM optical transmission system with an excellent transmission characteristic by employing a hybrid transmission line which is formed by combining under optimal conditions an optical fiber having positive wavelength dispersion, and an optical fiber having negative wavelength dispersion. According to the WDM optical transmission system, an optical transmitter station, optical amplifiers, and an optical receiver station are interconnected over an optical fiber transmission line. The optical fiber transmission line has an inter-repeater segment formed with a hybrid transmission line composed of a 1.3 &mgr;m zero-dispersion SMF and an RDF, and an inter-repeater segment formed with a DCF for compensating for cumulative wavelength dispersion generated in the hybrid transmission line. As the conditions for setting the hybrid transmission line, a ratio of the length of the RDF to the length of the inter-repeater segment must be 20% or more and 40% or less. Consequently, an influence due to a nonlinear effect or transmission loss in the hybrid transmission line can be minimized to thereby improve a transmission characteristic.
    • 本发明的目的是通过采用在最佳条件下组合具有正波长色散的光纤和具有负波长色散的光纤形成的混合传输线,来提供具有优良传输特性的WDM光传输系统。 根据WDM光传输系统,光发射机站,光放大器和光接收站通过光纤传输线互连。 光纤传输线具有形成有由1.3μm零色散SMF和RDF组成的混合传输线的中继器间段,以及形成有用于补偿在混合中产生的累积波长色散的DCF的中继器间段 传输线。 作为设定混合动力传输线的条件,RDF的长度与中继器间段的长度的比率必须在20%以上且40%以下。 因此,由于混合传输线路中的非线性效应或传输损耗的影响可以最小化,从而提高传输特性。