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    • 1. 发明授权
    • Method of heat treating a porous optical fiber preform
    • 热处理多孔光纤预制件的方法
    • US08341979B2
    • 2013-01-01
    • US12474689
    • 2009-05-29
    • Kenji Okada
    • Kenji Okada
    • C03B37/023
    • C03B37/01446
    • A method of producing an optical fiber preform by heating a glass preform that has a glass rod and a silica glass porous body and includes a valid portion and invalid portions, comprising: heating the glass preform while moving the glass preform along its axial direction relative to a heater; stopping the relative movement or decreasing a speed of the relative movement when an invalid portion positioned at a tail end reaches a vicinity of the heater; heating the invalid portion for a predetermined time while maintaining a temperature at which the silica glass porous body can be vitrified; decreasing the heating temperature to a temperature determined by adding 200° C. to an annealing point of a silica glass; and removing the glass preform to the outside of the heating furnace without increasing the heating temperature to the temperature at which the silica glass porous body is vitrified.
    • 一种通过加热具有玻璃棒和石英玻璃多孔体并具有有效部分和无效部分的玻璃预制棒来制造光纤预制件的方法,包括:在相对于 加热器 当位于尾端的无效部分到达加热器附近时,停止相对运动或减小相对运动的速度; 在保持石英玻璃多孔体可以玻璃化的温度的同时加热无效部分一段预定时间; 将加热温度降低至通过将二氧化硅玻璃的退火点加入200℃而确定的温度; 并且将玻璃预制件移至加热炉的外部,而不将加热温度升高到石英玻璃多孔体被玻璃化的温度。
    • 4. 发明申请
    • Curing composition
    • 固化组合物
    • US20070179249A1
    • 2007-08-02
    • US10561326
    • 2004-06-21
    • Kenji OkadaYoshiki Nakagawa
    • Kenji OkadaYoshiki Nakagawa
    • C08F8/00
    • C08F290/04
    • An object of the present invention is to provide a curable composition comprising a vinyl polymer, the curable composition capable of providing a cured product having good mechanical properties. The present invention is a curable composition comprising (A) a vinyl polymer (I) comprising, at the molecular terminal, at least one group represented by the general formula (1): CH2═C(Ra)—C(O)O— (1), wherein Ra represents a hydrogen atom or a monovalent organic group having 1 to 20 carbon atoms, and (B) a monoacrylate phenolic antioxidant.
    • 本发明的目的是提供一种包含乙烯基聚合物的可固化组合物,该固化组合物能够提供具有良好机械性能的固化产物。 本发明是一种可固化组合物,其包含(A)乙烯基聚合物(I),其在分子末端包含至少一个由通式(1)表示的基团:CH 2 CO 2(R C(O)O-(1)其中R a表示氢原子或碳原子数1〜20的一价有机基团,(B) 单丙烯酸酯酚类抗氧化剂。
    • 9. 发明授权
    • Transceiver module for optical communication
    • 光通信收发模块
    • US5528407A
    • 1996-06-18
    • US363278
    • 1994-12-22
    • Naotaro NakataHaruo TanakaNaofumi AokiKenji Okada
    • Naotaro NakataHaruo TanakaNaofumi AokiKenji Okada
    • G02B6/32G02B6/38G02B6/42H04B10/40H04B10/00
    • H04B10/40G02B6/4206G02B6/4246G02B6/32G02B6/327G02B6/3877G02B6/4207G02B6/4214
    • A transceiver module for optical communication includes a light-emitting element, a light-receiving element and a rod lens. Light from the light-emitting element is condensed onto the top end of the rod lens. A ferrule of an optical fiber is brought into physical contact with the top end surface of the rod lens so as to couple the light-emitting element and the light-receiving element with the optical fiber. The rod lens is held by a support supported by a spring member on a housing, and the outer diameter of the rod lens is formed so as to be substantially equal to the outer diameter of the ferrule. An opening portion is provided in the housing so that the top end of the ferrule of the optical fiber is slidably fitted into one end of a sleeve, the other end of which is slidably fitted onto the outer circumference of the rod lens. Also, a transceiver module includes a light-emitting element for emitting transmission signal light, a coupling lens for connecting the transmission signal light emitted from the light-emitting element to a light transmission path, and a light-receiving element for receiving detection signal light from the light transmission path, in which the transmission signal light emitted from the light-emitting element is reflected on a surface of the light-receiving element and connected to the light transmission path through the coupling lens; and the detection signal light from the light transmission path is received by the light-receiving element.
    • 用于光通信的收发器模块包括发光元件,光接收元件和棒状透镜。 来自发光元件的光会聚到棒状透镜的顶端。 将光纤的套圈与棒状透镜的顶端面物理接触,以将光发射元件和光接收元件与光纤耦合。 棒状透镜被由壳体上的弹簧构件支撑的支撑件保持,并且棒状透镜的外径形成为基本上等于套圈的外径。 开口部设置在壳体中,使得光纤的套圈的顶端可滑动地嵌合在套筒的一端中,套筒的另一端可滑动地装配到杆状透镜的外圆周上。 此外,收发器模块包括用于发射透射信号光的发光元件,用于将从发光元件发射的发射信号的光连接到光传输路径的耦合透镜,以及用于接收检测信号光的光接收元件 从光发射元件发射的发射信号光在光接收元件的表面上被反射并通过耦合透镜连接到光传输路径的光传输路径; 并且来自光传输路径的检测信号光被光接收元件接收。
    • 10. 发明授权
    • Optical transmission system
    • 光传输系统
    • US5523870A
    • 1996-06-04
    • US356535
    • 1994-12-15
    • Yasuhiro SuzukiKenji Okada
    • Yasuhiro SuzukiKenji Okada
    • H04B10/27H04B10/07H04B10/272H04J14/08H04Q11/00
    • H04J14/08H04Q11/0062H04Q11/0067H04Q2011/0015H04Q2011/002H04Q2011/0026H04Q2011/0039H04Q2011/0043H04Q2011/0045H04Q2011/0081H04Q2011/0094
    • In an optical transmission system between an optical subscriber unit (10; OSU) in a central office and a plurality of optical network units (20.sub.i ; ONU) in customer premises each coupled with said subscriber unit (10) through a single optical transmission line (32.sub.i), an optical switch (40) is provided for selectively coupling one of said network units (20.sub.i) to said subscriber unit (10) sequentially on time division multiplexing operation, so that no attenuation except small insertion loss by an optical switch occurs in switching. A downstream frame from said subscriber unit (10) to said network units (20.sub.i) has a plurality of time slots each of which is to be switched to a predetermined related network unit, and de-multiplexed by said optical switch. Each time slot has no identification for addressing. An upstream frame from network units are multiplexed by said optical switch. Said downstream frame and said upstream frame are multiplexed in a single optical transmission line either through time division multiplexing or through wavelength multiplexing.
    • 在中心局的光用户单元(10; OSU)和客户驻地的多个光网络单元(20i; ONU)之间的光传输系统中,每个与所述用户单元(10)通过单个光传输线 32i),提供光开关(40),用于在时分多路复用操作上顺序地选择性地将所述网络单元(20i)中的一个连接到所述用户单元(10),使得除光学开关的插入损耗小的衰减不会发生在 交换。 从所述用户单元(10)到所述网络单元(20i)的下行帧具有多个时隙,每个时隙将切换到预定的相关网络单元,并由所述光开关解复用。 每个时隙没有寻址标识。 来自网络单元的上行帧由所述光开关复用。 所述下行帧和所述上行帧通过时分复用或通过波长多路复用在单个光传输线中。