中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

277 records (took 0.029 seconds)

    Sol-gel-based optical preforms and methods of manufacture
    72.
    发明申请
    Sol-gel-based optical preforms and methods of manufacture 审中-公开
    基于溶胶凝胶的光学预型件和制造方法

    公开(公告)号：US20030147606A1

    公开(公告)日：2003-08-07

    申请号：US10215162

    申请日：2002-08-07

    Inventor： Shiho Wang ,  Yasar Halefoglu ,  Chih-Hsing Cheng

    IPC: G02B006/02

    CPC classification number: C03C3/06 ,  C03B19/12 ,  C03B37/01211 ,  C03B37/0124 ,  C03B37/016 ,  C03B2201/10 ,  C03B2201/12 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2201/32 ,  C03B2201/34

    Abstract: An optical preform includes plural material components including a core material and a cladding material. A component of the optical preform is manufactured by a process of preparing a sol-gel solution comprising at least 3 mole % of a catalyst. The process further includes forming a wet gel monolith by allowing the sol-gel solution to undergo gelation. The process further includes drying and shrinking the wet gel monolith by exposing the wet gel monolith to a temporal temperature profile.

    Abstract translation: 光学预型件包括包括芯材料和包层材料的多种材料组分。 通过制备包含至少3摩尔％催化剂的溶胶 - 凝胶溶液的方法制造光学预型件的组分。 该方法还包括通过使溶胶 - 凝胶溶液进行凝胶化而形成湿凝胶整料。 该方法还包括通过将湿凝胶整料暴露于时间温度曲线来干燥和收缩湿凝胶整料。

    Optical fiber preform, production method thereof, and optical fiber produced from the preform
    73.
    发明申请
    Optical fiber preform, production method thereof, and optical fiber produced from the preform 有权
    光纤预制棒，其制造方法以及由该预成形坯制成的光纤

    公开(公告)号：US20030145630A1

    公开(公告)日：2003-08-07

    申请号：US10291813

    申请日：2002-11-12

    Inventor： Masaaki Hirano ,  Eiji Yanada ,  Masashi Onishi

    IPC: C03B037/028

    CPC classification number: C03C3/06 ,  C03B37/01211 ,  C03B37/01228 ,  C03B37/01248 ,  C03B37/0126 ,  C03B2201/02 ,  C03B2201/10 ,  C03B2201/12 ,  C03B2201/20 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2203/23 ,  C03B2203/36 ,  G02B6/02285 ,  G02B6/03627

    Abstract: An optical fiber preform having a low core noncircularity and eccentricity for producing an optical fiber having an improved polarization mode dispersion, a method for producing the preform, and an optical fiber produced from the preform. The optical fiber preform is produced by the following steps. Diameter-reduced portions 11a and 11b are formed in the vicinity of the ends of the glass pipe 11. A glass rod 12 is inserted into the glass pipe 11. The glass rod 12 is fixed to the glass pipe 11 at the diameter-reduced portion 11a. The glass pipe 11 and the glass rod 12 are heat-unified from the diameter-reduced portion 11b forward to the diameter-reduced portion 11a. The optical fiber preform has a core noncircularity of at most 1.5%. The optical fiber has a polarization mode dispersion of at most 0.15 ps/km1/2 at a wavelength of 1,550 nm.

    Abstract translation: 一种具有低芯非圆度和偏心率的光纤预制件，用于制造具有改进的偏振模色散的光纤，由预成型件制造的预制棒的制造方法和光纤。 光纤预制棒通过以下步骤制造。 直径减小部分11a和11b形成在玻璃管11的端部附近。玻璃棒12插入到玻璃管11中。玻璃棒12在直径减小部分处固定到玻璃管11上 11a。 玻璃管11和玻璃棒12从直径减小部分11b向前加热到直径减小部分11a。 光纤预制棒的芯非圆度至多为1.5％。 该光纤在波长1550nm处具有至多0.15ps / km1 / 2的偏振模色散。

    Method of fabrication of rare earth doped preforms for optical fibers
    74.
    发明授权
    Method of fabrication of rare earth doped preforms for optical fibers 有权
    光纤稀土掺杂预制棒的制造方法

    公开(公告)号：US06578387B2

    公开(公告)日：2003-06-17

    申请号：US09492925

    申请日：2000-01-28

    Applicant: Kanishka Tankala

    Inventor： Kanishka Tankala

    IPC: C03B37018

    CPC classification number: C03B37/01838 ,  C03B2201/10 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2201/34 ,  C03B2201/36

    Abstract: The present invention discloses a method of fabricating rare earth-doped preforms for optical fibers. A silica soot is deposited as a layer with high porosity on an inner surface of a silica-based tube by a modified chemical vapor deposition (MCVD) process at a temperature high enough to produce the silica soot but low enough to avoid sintering of the soot into the silica-based tube. The silica-based tube is then immersed in a solution including a rare earth element and a codopant element for impregnation. The excess solution is drained and the silica-based tube is dried in a stream of chlorine and inert gas at an elevated temperature. Then, the rare earth element and the codopant element are oxidized under an oxygen partial pressure at a temperature high enough to overcome kinetic limitations against oxidation. Finally, the soot layer is consolidated while flowing a mixture of chlorides of a second codopant element and oxygen at a sintering temperature at which the second codopant element reacts with oxygen to form codopant oxide which is delivered around the rare earth element oxide deposited in the soot layer. In the method of the current invention, one or more rare earth elements are codoped with preferred codopants including but not limited to Ge, Al, P and/or B to enhance the performance of the rare earth ions. Other dopants may also be used in conjunction with the preferred dopants for modifying the refractive index of the core.

    Abstract translation: 本发明公开了一种制造用于光纤的稀土掺杂预制棒的方法。 通过改进的化学气相沉积（MCVD）工艺在二氧化硅基管的内表面上沉积具有高孔隙率的二氧化硅烟灰，其温度足够高以产生二氧化硅烟灰，但足够低以避免烟灰的烧结 进入二氧化硅基管。 然后将二氧化硅基管浸入包括稀土元素和共掺杂元素的溶液中以进行浸渍。 排出过量的溶液，并将二氧化硅基管在升高的温度下在氯气和惰性气体流中干燥。 然后，稀土元素和共掺杂元素在足够高的温度下在氧分压下氧化，以克服对氧化的动力学限制。 最后，在第二共掺杂元素与氧反应的烧结温度下流过第二共掺杂元素和氧的氯化物的混合物而固化烟灰层，以形成在沉积在烟炱中的稀土元素氧化物周围输送的共氧化物氧化物 层。 在本发明的方法中，一种或多种稀土元素与优选的共掺混合物共混，包括但不限于Ge，Al，P和/或B以提高稀土离子的性能。 其它掺杂剂也可与优选的掺杂剂结合使用以改变芯的折射率。

    Method of fabrication of rare earth doped preforms for optical fibers
    76.
    发明申请
    Method of fabrication of rare earth doped preforms for optical fibers 有权

    公开(公告)号：US20030024275A1

    公开(公告)日：2003-02-06

    申请号：US09492925

    申请日：2000-01-28

    Inventor： Kanishka Tankala

    IPC: C03B037/018

    CPC classification number: C03B37/01838 ,  C03B2201/10 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2201/34 ,  C03B2201/36

    Abstract: The present invention discloses a method of fabricating rare earth-doped preforms for optical fibers. A silica soot is deposited as a layer with high porosity on an inner surface of a silica-based tube by a modified chemical vapor deposition (MCVD) process at a temperature high enough to produce the silica soot but low enough to avoid sintering of the soot into the silica-based tube. The silica-based tube is then immersed in a solution including a rare earth element and a codopant element for impregnation. The excess solution is drained and the silica-based tube is dried in a stream of chlorine and inert gas at an elevated temperature. Then, the rare earth element and the codopant element are oxidized under an oxygen partial pressure at a temperature high enough to overcome kinetic limitations against oxidation. Finally, the soot layer is consolidated while flowing a mixture of chlorides of a second codopant element and oxygen at a sintering temperature at which the second codopant element reacts with oxygen to form codopant oxide which is delivered around the rare earth element oxide deposited in the soot layer. In the method of the current invention, one or more rare earth elements are codoped with preferred codopants including but not limited to Ge, Al, P and/or B to enhance the performance of the rare earth ions. Other dopants may also be used in conjunction with the preferred dopants for modifying the refractive index of the core.

    Rit method of making optical fiber having depressed index core region
    78.
    发明授权
    Rit method of making optical fiber having depressed index core region 失效
    制造具有凹陷指数核心区域的光纤的Rit方法

    公开(公告)号：US06422042B1

    公开(公告)日：2002-07-23

    申请号：US09256248

    申请日：1999-02-23

    Applicant: George F. Berkey

    Inventor： George F. Berkey

    IPC: C03B37027

    CPC classification number: G02B6/03627 ,  C03B37/01211 ,  C03B37/01245 ,  C03B37/01248 ,  C03B37/01453 ,  C03B37/01473 ,  C03B37/01486 ,  C03B37/01493 ,  C03B37/01869 ,  C03B37/01884 ,  C03B2201/10 ,  C03B2201/12 ,  C03B2201/14 ,  C03B2201/31 ,  C03B2203/22 ,  C03B2203/36 ,  G02B6/02261 ,  G02B6/0281 ,  G02B6/03644

    Abstract: Disclosed is a method of making an optical fiber preform having at least one annular region of depressed refractive index. A tube of silica doped with fluorine and/or boron is overclad with silica soot. A core rod is inserted into the overclad tube and the resultant assembly is heated while chlorine flows between the tube and the core rod to clean the adjacent surfaces. When the soot sinters, the tube collapses onto and fuses to the rod. The resultant tubular structure is formed into an optical fiber which exhibits low attenuation as a result of the low seed count at the interface between the inner core and the region that is doped with florine and/or boron.

    Abstract translation: 公开了制造具有至少一个折射率低的环形区域的光纤预制件的方法。 掺有氟和/或硼的二氧化硅管用二氧化硅烟灰包覆。 将芯棒插入外包层管中，并且所得组件被加热，同时氯在管和芯棒之间流动以清洁相邻表面。 当烟灰烧结时，管塌陷并熔化到杆上。 所得的管状结构形成为由于在内核和掺杂有氟和/或硼的区域之间的界面处的低种子计数而显示出低衰减的光纤。

Patent Agency Ranking