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    • 1. 发明授权
    • Method of forming a fiber preform with dopants dissolved in a liquid
    • 用溶解在液体中的掺杂剂形成纤维预型体的方法
    • US5198270A
    • 1993-03-30
    • US789734
    • 1991-11-08
    • Matthew J. AndrejcoBrian G. Bagley
    • Matthew J. AndrejcoBrian G. Bagley
    • C03B37/016C03B37/018
    • C03B37/01838C03B37/016C03B2201/34C03B2201/36C03B2203/22
    • A method of forming an optical fiber. A solution (12) is prepared in which are dissolved both a ladder siloxane and one or more dopants which are to be incorporated into the final silica or silicate glass. The solution is drawn into the interior of a silica tube (10) and is left as a coating (26) on the inside wall. The solvent is evaporated, and the rigid coating is cured at 150.degree. C. The filling and curing process may be repeated for multiple layers. The cured coating is then oxidized and fused into doped silica. The resultant tube preform is collapsed and drawn into a fiber. The method allows the introduction of nearly arbitrary constituents into the silica, including glass-forming elements and low-level dopants. The core-cladding interface is improved if a layer of glass-forming soot particles (28) is first deposited and the liquid is soaked into and over the soot.
    • 一种形成光纤的方法。 制备溶液(12),其中溶解有梯形硅氧烷和一种或多种掺入到最后的二氧化硅或硅酸盐玻璃中的掺杂剂。 溶液被吸入石英管(10)的内部,并作为涂层(26)留在内壁上。 蒸发溶剂,刚性涂层在150℃下固化。填充和固化过程可以重复多层。 然后将固化的涂层氧化并熔融成掺杂的二氧化硅。 所得的管预成型件被折叠并且被拉伸成纤维。 该方法允许将几乎任意的成分引入到二氧化硅中,包括玻璃形成元件和低级掺杂剂。 如果首先沉积一层玻璃形成的烟灰颗粒(28)并且将液体浸泡在烟灰中和上方,则核 - 包层界面得到改善。
    • 8. 发明授权
    • Method of making a glass body having a graded refractive index profile
    • 制造具有渐变折射率分布的玻璃体的方法
    • US4812153A
    • 1989-03-14
    • US2731
    • 1987-01-12
    • Matthew J. AndrejcoJohn B. MacChesney
    • Matthew J. AndrejcoJohn B. MacChesney
    • C03B37/014C03C25/02
    • C03B37/014C03B37/01446C03B2201/10C03B2201/28C03B2201/30C03B2201/31C03B2201/32C03B2201/34C03B2201/50C03B2201/54C03B2203/22Y10S65/90
    • A glass body having a graded (substantially Gaussian) index profile is produced by a process that comprises providing a doped porous body (e.g., having a uniform dopant distribution), heat treating the porous body in a halogen-containing atmosphere, and consolidating the porous body into the glass body. The heat treatment removes a predetermined portion of the dopant from the porous body, such that the radial dopant profile in the glass body differs from the initial profile in the porous body, and such that the Gaussian index profile results. Exemplarily, the porous body is a uniformly germania-doped, VAD-produced, high-silica rod having radially decreasing density, and the heat treatment comprises an 8-hour densification soak at 1300.degree. C. in 20% Cl, 80% He. In a preferred embodiment, silica overcladding is deposited on a graded index core rod produced according to the invention, and fiber drawn from the resulting composite glass body.
    • 通过包括提供掺杂的多孔体(例如,具有均匀的掺杂剂分布)的方法,在含卤素的气氛中热处理多孔体,并且将多孔体 身体进入玻璃体。 热处理从多孔体中去除掺杂剂的预定部分,使得玻璃体中的径向掺杂剂分布与多孔体中的初始分布不同,并且导致高斯折射率分布。 示例性地,多孔体是均匀的掺杂氧化钆的VAD生产的,具有径向减小的密度的高硅石棒,并且热处理包括在20%Cl,80%He中在1300℃下8小时的致密化浸泡。 在优选的实施方案中,二氧化硅外包层沉积在根据本发明制备的渐变折射率芯棒上,并从所得到的复合玻璃体中拉出纤维。
    • 9. 发明授权
    • Zirconia induction furnace
    • 氧化锆感应炉
    • US4450333A
    • 1984-05-22
    • US383386
    • 1982-05-28
    • Matthew J. AndrejcoUn C. PaekCharles M. Schroeder, Jr.
    • Matthew J. AndrejcoUn C. PaekCharles M. Schroeder, Jr.
    • C03B37/029H05B6/02H05B6/30C03B27/02F27B14/10
    • C03B37/029C03B2205/63C03B2205/64C03B2205/70
    • A high frequency induction furnace (10) for reflowing a portion of a lightguide preform (44) in order to draw a fiber (52) therefrom. The furnace (10) has a centrally located tubular susceptor (34) therein having a thin coating of the preform material (e.g., silica) on at least a portion of the inside surface thereof. A cylinder (62) is positioned in concentric, spaced relation about the susceptor (34) and is surrounded by an insulating grain (36). A high frequency coil (38) is energized to couple its electromagnetic field to the susceptor (34) to heat and reflow a portion of the preform (44) in order to draw the fiber (52) therefrom. The thin coating prevents contaminating particulates from migrating from small cracks in the inside surface of the susceptor (34) onto the preform (44) while the cylinder (62) prevents small particulate emanating from the insulating grain (36) from being drawn through larger cracks in the susceptor and onto the preform and/or the fiber 52.
    • 一种用于回流光导预制件(44)的一部分以便从其中拉出纤维(52)的高频感应炉(10)。 炉(10)在其中具有中心定位的管状基座(34),其中在其内表面的至少一部分上具有预制件材料(例如二氧化硅)的薄涂层。 圆筒(62)围绕基座(34)以同心的间隔的关系定位并被绝缘颗粒(36)包围。 高频线圈(38)被通电以将其电磁场耦合到基座(34),以加热和回流预成型件(44)的一部分,以从其中拉出纤维(52)。 薄的涂层防止污染的微粒从基座(34)的内表面中的小裂纹迁移到预成型件(44)上,同时气缸(62)防止从绝缘颗粒(36)发出的小的颗粒物不被较大的裂纹 在基座上和预制件和/或纤维52之间。