Method of manufacturing hollow core optical fibers
    11.
    发明授权
    Method of manufacturing hollow core optical fibers 失效
    制造中空纤维光纤的方法

    公开(公告)号:US4764194A

    公开(公告)日:1988-08-16

    申请号:US876272

    申请日:1986-06-19

    Abstract: A method for manufacturing hollow core optical fibers is disclosed comprising continuously feeding a glass rod of the desired cladding composition into a high temperature furnace with the rod in line contact with the inner surface of the glass tube. The glass transition temperature of the rod is substantially lower than the glass transition temperature of the glass tube. The glass rod composition is uniformly distributed on the glass tube inner wall as it enters the furnace hot zone. The ratio of the rod diameter to the glass tube inner diameter and the drawing temperature determine the coating thickness of the glass cladding on the inner surface of the glass tube. As the coated tube is passed through the furnace hot zone peak, the optical fiber is drawn. The rod and tube feed rate, the drawing temperature of the rod and glass tube and the drawing rate of the coated glass tube are selected to yield a hollow core optical fiber, with preselected interior and exterior diameters.

    Eliminating crystals in non-oxide optical fiber preforms and optical fibers
    13.
    发明授权
    Eliminating crystals in non-oxide optical fiber preforms and optical fibers 有权
    消除非氧化物光纤预制棒和光纤中的晶体

    公开(公告)号:US07848606B1

    公开(公告)日:2010-12-07

    申请号:US12047805

    申请日:2008-03-13

    Abstract: A method is provided for eliminating crystals in non-oxide optical fiber preforms as well as optical fibers drawn therefrom. The optical-fiber-drawing axis of the preform is aligned with the force of gravity. A magnetic field is applied to the preform as it is heated to at least a melting temperature thereof. The magnetic field is applied in a direction that is parallel to the preform's optical-fiber-drawing axis. The preform is then cooled to a temperature that is less than a glass transition temperature of the preform while the preform is maintained in the magnetic field. When the processed preform is to have an optical fiber drawn therefrom, the preform's optical-fiber-drawing axis is again aligned with the force of gravity and a magnetic field is again applied along the axis as the optical fiber is drawn from the preform.

    Abstract translation: 提供了一种消除非氧化物光纤预制件中的晶体以及从其中拉出的光纤的方法。 预成型件的光纤拉伸轴与重力对齐。 当预热体被加热到至少其熔融温度时,施加磁场。 磁场沿与预成型件的光纤拉伸轴平行的方向施加。 然后将预成型件冷却至小于预成型件的玻璃化转变温度的温度,同时将预制件保持在磁场中。 当经处理的预成型件具有从其中拉出的光纤时,预成型件的光纤拉伸轴线再次与重力对准,并且随着从预成型件拉出光纤,沿轴线再次施加磁场。

    PROCESS FOR PRODUCING OPTICAL FIBER
    20.
    发明申请
    PROCESS FOR PRODUCING OPTICAL FIBER 审中-公开
    生产光纤的工艺

    公开(公告)号:US20090095024A1

    公开(公告)日:2009-04-16

    申请号:US12272101

    申请日:2008-11-17

    Abstract: To provide a process for producing an air cladding type optical fiber by a method other than extrusion molding.A process for producing an optical fiber comprising a hollow glass fiber with an optical transmission glass held to extend in its axial direction at its center, which process comprises a step of heating and drawing a glass rod having three or more holes with an equal diameter provided around its center axis to extend in its axial direction where the distance between each hole and the axis is mutually equal and the distance between adjacent holes is mutually equal, and a portion surrounded by such holes will constitute said optical transmission glass, while applying pressure to expand the holes with one end of the rod closed, to form a preform wherein glass between the holes is in a plate form, and subjecting the preform to wire drawing to form an optical fiber in which said optical transmission glass is held by plate glass.

    Abstract translation: 提供通过除挤出成型以外的方法制造空气包层型光纤的方法。 一种制造光纤的方法,该光纤包括中空玻璃纤维,该中空玻璃纤维具有保持其轴向在其中心延伸的光学透射玻璃,该方法包括加热和拉制具有三个或更多个具有相同直径的孔的玻璃棒的步骤 围绕其中心轴线延伸,每个孔和轴之间的距离相互相等并且相邻孔之间的距离相互相等,并且由这些孔包围的部分将构成所述光学透射玻璃,同时施加压力 在孔的一端封闭的情况下扩大孔,形成预成型件,其中,孔之间的玻璃呈板状,并对预成型件进行拉丝,形成光学玻璃。

Patent Agency Ranking