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    • 1. 发明授权
    • Method for elongating glass preform
    • 拉伸玻璃预制件的方法
    • US5755849A
    • 1998-05-26
    • US756483
    • 1996-11-26
    • Sumio HoshinoYuichi OhgaMasumi ItoToshio DanzukaTatsuhiko Saito
    • Sumio HoshinoYuichi OhgaMasumi ItoToshio DanzukaTatsuhiko Saito
    • C03B23/047C03B37/012C03B37/014C03B37/07
    • C03B23/047C03B37/0124C03B37/01466
    • The present invention relates to a method for precisely elongating a glass preform of an optical fiber body having a desired outer diameter. In this method, a predetermined part of the glass preform is elongated as tensile stress is applied to one end of the glass preform while a predetermined part of the glass preform is heated and softened successively from one end toward the other end of the glass preform. In this elongating operation, while the outer diameter of the softening portion of the glass preform is measured, the tensile stress is adjusted such that the outer diameter of the softening portion coincides with a preset value of the control outer diameter. In particular, this method is characterized in that the preset value of the control outer diameter is changed at least during a predetermined period until termination of elongation or during a predetermined period from the start of elongation.
    • 本发明涉及一种精确拉伸具有所需外径的光纤体的玻璃预制件的方法。 在这种方法中,玻璃预成型件的预定部分是细长的,因为拉伸应力被施加到玻璃预制件的一端,同时玻璃预制件的预定部分从玻璃预制件的一端向另一端依次加热软化。 在该拉伸操作中,在测量玻璃预制件的软化部分的外径的同时,调整拉伸应力使得软化部分的外径与控制外径的预设值一致。 特别地,该方法的特征在于,控制外径的预设值至少在延伸终止的预定时段期间或从伸长开始的预定时段期间改变。
    • 7. 发明授权
    • Optical packet switching system and method for controlling the peak power
    • 光分组交换系统和控制峰值功率的方法
    • US09077475B2
    • 2015-07-07
    • US13601942
    • 2012-08-31
    • Tatsuhiko SaitoSatoru OkanoKoji Bato
    • Tatsuhiko SaitoSatoru OkanoKoji Bato
    • H04J14/00H04B17/00H04J14/02
    • H04J14/0221H04J14/0212
    • An optical packet switching system includes an optical packet transmitter, an optical packet switching apparatus, an optical amplifier, an optical packet receiver, an information gathering unit, and a peak power calculation unit. The information gathering unit collects the packet density, time-averaged power and extinction ratio from the optical packet transmitter, collects the packet density, time-averaged power and noise figure from the optical amplifier, collects the packet density, time-averaged power, switch on/off time ratio and extinction ratio from the optical packet switching apparatus, and collects the packet density and time-averaged power from the optical packet receiver. The peak power calculation unit calculates the peak power of an optical packet signal outputted from each apparatus/device based on the collected information. The device control unit control each apparatus/device based on the calculated peak power such that the optical packet signal having a peak power according to a predetermined optical level diagram is outputted.
    • 光分组交换系统包括光分组发射机,光分组交换设备,光放大器,光分组接收机,信息采集单元和峰值功率计算单元。 信息采集单元从光分组发送器收集分组密度,时间平均功率和消光比,从光放大器收集分组密度,时间平均功率和噪声系数,收集分组密度,时间平均功率,开关 开/关时间比和消光比,并从光分组接收机收集分组密度和时间平均功率。 峰值功率计算单元基于收集的信息来计算从每个装置/装置输出的光分组信号的峰值功率。 设备控制单元基于计算的峰值功率来控制每个设备/设备,以便输出具有根据预定光学水平图的峰值功率的光分组信号。
    • 9. 发明申请
    • Optical fiber
    • 光纤
    • US20060159410A1
    • 2006-07-20
    • US11262965
    • 2005-11-01
    • Tatsuhiko SaitoKenichiro TakahashiTetsutarou Katayama
    • Tatsuhiko SaitoKenichiro TakahashiTetsutarou Katayama
    • G02B6/032
    • G02B6/02347C03B37/0122C03B2203/14C03B2203/19C03B2203/20C03B2203/42G02B6/02214G02B6/02338G02B6/02357G02B6/02361G02B6/105
    • The present invention relates to an optical fiber having a configuration which enables utilization of nonlinear phenomena in the near-infrared region. The optical fiber is directed to a holey fiber having a core region extending along a predetermined axis and a cladding region with plural holes arranged along the core region. The plural holes are arranged to constitute plural layers about the core region in the cross-section orthogonal to the predetermined axis. The three holes constituting the first layer (the innermost layer) closest to the core region correspond to three vertexes from among the six vertexes of a regular hexagon and are placed such that the arrangement of the three holes has three-fold rotational symmetry. The optical fiber enables utilization of nonlinear phenomena in the near-infrared region, by properly adjusting the hole diameter d and the pitch L between adjacent holes from among the holes constituting a single layer.
    • 本发明涉及具有能够利用近红外区域的非线性现象的结构的光纤。 光纤被引导到具有沿着预定轴线延伸的芯区域的多孔纤维和沿着核心区域布置有多个孔的包层区域。 多个孔配置成在与规定轴正交的截面中围绕芯部区域构成多层。 构成最靠近芯部区域的第一层(最内层)的三个孔对应于正六边形的六个顶点中的三个顶点,并且被放置成使得三个孔的布置具有三重旋转对称性。 通过适当地调整构成单层的孔中的孔直径d和相邻孔之间的间距L,能够利用近红外区域的非线性现象。
    • 10. 发明申请
    • OPTICAL PACKET SWITCHING SYSTEM AND METHOD FOR CONTROLLING THE PEAK POWER
    • 光分组开关系统及其控制方法
    • US20130058645A1
    • 2013-03-07
    • US13601942
    • 2012-08-31
    • Tatsuhiko SaitoSataru OkanoKoji Bato
    • Tatsuhiko SaitoSataru OkanoKoji Bato
    • H04Q11/00
    • H04J14/0221H04J14/0212
    • An optical packet switching system includes an optical packet transmitter, an optical packet switching apparatus, an optical amplifier, an optical packet receiver, an information gathering unit, and a peak power calculation unit. The information gathering unit collects the packet density, time-averaged power and extinction ratio from the optical packet transmitter, collects the packet density, time-averaged power and noise figure from the optical amplifier, collects the packet density, time-averaged power, switch on/off time ratio and extinction ratio from the optical packet switching apparatus, and collects the packet density and time-averaged power from the optical packet receiver. The peak power calculation unit calculates the peak power of an optical packet signal outputted from each apparatus/device based on the collected information. The device control unit control each apparatus/device based on the calculated peak power such that the optical packet signal having a peak power according to a predetermined optical level diagram is outputted.
    • 光分组交换系统包括光分组发射机,光分组交换设备,光放大器,光分组接收机,信息采集单元和峰值功率计算单元。 信息采集单元从光分组发送器收集分组密度,时间平均功率和消光比,从光放大器收集分组密度,时间平均功率和噪声系数,收集分组密度,时间平均功率,开关 开/关时间比和消光比,并从光分组接收机收集分组密度和时间平均功率。 峰值功率计算单元基于收集的信息来计算从每个装置/装置输出的光分组信号的峰值功率。 设备控制单元基于计算的峰值功率来控制每个设备/设备,以便输出具有根据预定光学水平图的峰值功率的光分组信号。