Method of making an optical fiber communication system
    1.
    发明授权
    Method of making an optical fiber communication system 失效
    制造光纤通信系统的方法

    公开(公告)号:US5243674A

    公开(公告)日:1993-09-07

    申请号:US936685

    申请日:1992-08-27

    摘要: Fusion splicing of optical fiber generally requires removal of a polymer coating from the end portions of two lengths of fiber. A conventional removal method involves immersion of the fiber ends in an appropriate polymer stripping liquid, e.g., in hot, concentrated sulfuric acid. It is known that the strength of fusion splices generally is statistically distributed, such that there exists a probability that a given splice will pass at a given proof test level. We have found that the splice strength distribution can be shifted towards higher strength if the polymer stripping liquid comprises means for insuring that the liquid is essentially free of strength-reducing particles. Preferred means are concentrated nitric acid. Exemplarily, the liquid is at a temperature in the range 170.degree.-200.degree. C. and comprises concentrated (about 95%) sulfuric acid and about 5% b.v. concentrated (about 70%) nitric acid.

    Latent image thick refractive index recordings
    3.
    发明授权
    Latent image thick refractive index recordings 失效
    潜影图像厚折射率记录

    公开(公告)号:US4173475A

    公开(公告)日:1979-11-06

    申请号:US801783

    申请日:1977-05-31

    IPC分类号: G03F7/00 G03C5/04 G03C1/72

    CPC分类号: G03F7/001

    摘要: A latent-imaging photopolymer system for recording thick refractive index patterns is disclosed. The system utilizes a porous matrix which has been sensitized by chemisorption of a photosensitive polymerization initiator. The sensitized matrix is exposed to light in the desired pattern. This light destroys initiator to impress the pattern. Then the pores are filled with a monomer composition. Finally the entire filled matrix is irradiated to induce polymerization initiation by the sensitizer remaining after the initial exposure. Polymerization produces locally induced refractive index gradients corresponding to the pattern of the light in the initial exposure step.

    摘要翻译: 公开了一种用于记录厚折射率图案的潜像成像光聚合物系统。 该系统利用已经通过光敏聚合引发剂的化学吸附而致敏的多孔基质。 致敏基质以所需的图案曝光。 这种光摧毁了发起者的印象。 然后用单体组合物填充孔。 最后,照射完全填充的基质,以在初次暴露后残留的敏化剂引发聚合引发。 在初始曝光步骤中聚合产生对应于光图案的局部诱导折射率梯度。

    Technique for electrodeposition of water-based polymeric coating
    4.
    发明授权
    Technique for electrodeposition of water-based polymeric coating 失效
    水性聚合物涂层电沉积技术

    公开(公告)号:US4132608A

    公开(公告)日:1979-01-02

    申请号:US775770

    申请日:1977-03-09

    IPC分类号: C09D5/44 C25D5/02 C25D11/00

    CPC分类号: C09D5/4469

    摘要: A water-based polymeric coating comprising a novolak resin is deposited electrolytically from a solution of a novolak resin upon a conductive substrate at an initial current density ranging from 10-30 milliamperes per square centimeter. The resultant coating, after cross linking by subsequent chemical treatment, is flexible, firmly adherent and evidences good thermal stability and insulation characteristics, so suggesting its use as a cover coat for printed circuits.

    摘要翻译: 包含酚醛清漆树脂的水性聚合物涂层以10-30毫安/平方厘米的初始电流密度从酚醛清漆树脂的溶液中电解沉积在导电基材上。 所得涂层在通过后续化学处理交联后是柔性的,牢固粘附的并且证明了良好的热稳定性和绝缘特性,因此表明其用作印刷电路的覆盖层。