REFRACTIVE INDEX PROFILE TYPE OPTICAL FIBER
    1.
    发明公开
    REFRACTIVE INDEX PROFILE TYPE OPTICAL FIBER 失效
    OPTISCHE FASER MIT BRECHUNGSINDEXPROFILART

    公开(公告)号:EP1026525A4

    公开(公告)日:2000-10-18

    申请号:EP98933939

    申请日:1998-07-27

    摘要: Disclosed is a graded index type optical fiber having a multilayer structure comprising a plurality of concentrically arranged non-blended layers LNB1 to LNBm formed of (co)polymers P1 to Pm selected from the group consisting of two or more homopolymers HP1, HP2, ... and HPn composed of units of vinyl monomers M1, M2, ... and Mn, respectively (provided that the refractive indices of the homopolymers decrease in that order), and one or more binary copolymers CPs composed of units of vinyl monomers M1, M2, ... and Mn, each of (co)polymers P1 to Pm having a glass transition temperature (Tg) of 80 DEG C or above, wherein the refractive index is highest at the center of the multilayer structure and decreases gradually toward the outer periphery thereof. This optical fiber has a small transmission loss, a large numerical aperture, and excellent resistance to moist heat.

    摘要翻译: 一种具有多层结构的折射率分布型光纤,其中玻璃化转变温度(Tg)为80℃或更高的共聚物(P1-Pm)的多个非混合层(LNB1-LNBm)同心地层压 ,共聚物(P1-Pm)选自一种或多种均聚物(HP1,HP2,...和HPn)(其中这些均聚物的折射率按此顺序降低),每种均聚物包含两种或更多种 各种乙烯基单体(M1,M2,...和Mn)和包含M1,M2,...和Mn单元的共聚物(CP),并且在多层的中心部分具有最高的折射率 结构并且朝向周边部分逐渐减小。 该光纤具有低传输损耗,大数值孔径和优异的耐湿热性。