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    Oxide structure useable for optical waveguide and method of forming the oxide structure
    252.
    发明申请
    Oxide structure useable for optical waveguide and method of forming the oxide structure 审中-公开
    用于光波导的氧化物结构和形成氧化物结构的方法

    公开(公告)号：US20030044154A1

    公开(公告)日：2003-03-06

    申请号：US10210978

    申请日：2002-08-02

    Inventor： Martin Mogaard

    IPC: G02B006/10 ,  C03B037/022

    CPC classification number: G02B6/134 ,  C03B19/1415 ,  C03B19/1453 ,  C03B2201/10 ,  C03B2201/31 ,  G02B6/13 ,  G02B2006/121

    Abstract: A method of forming an oxide structure and an oxide structure formed by the method. In one embodiment a lower cladding layer on a substrate is provided. At least one core layer is formed on lower cladding layer, the core layer includes boron at a concentration that produces substantially zero internal stress of said core layer. At least one upper cladding layer is formed on the core layer wherein at least one of the upper and lower cladding layers include germanium at a concentration level such that the upper and lower cladding layers exhibit substantially equivalent refractive indices.

    Abstract translation: 通过该方法形成氧化物结构和氧化物结构的方法。 在一个实施例中，提供了衬底上的下包层。 至少一个核心层形成在下包层上，芯层包括浓度为产生所述芯层的基本上零内应力的硼。 在芯层上形成至少一个上包层，其中上包层和下敷层中的至少一个包括锗，其浓度水平使得上和下包层表现出基本相等的折射率。

    Method of making optical fiber having depressed index core region
    254.
    发明申请
    Method of making optical fiber having depressed index core region 审中-公开
    具有凹陷指数核心区域的光纤的制造方法

    公开(公告)号：US20020134113A1

    公开(公告)日：2002-09-26

    申请号：US10150562

    申请日：2002-05-17

    Inventor： George F. Berkey

    IPC: C03B037/027

    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 fluorine 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。 所得到的管状结构形成为由于在内芯和掺杂有氟和/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。

    Method for making glasses containing rare earth fluorides
    255.
    发明申请
    Method for making glasses containing rare earth fluorides 失效
    制造含稀土氟化物的玻璃的方法

    公开(公告)号：US20020017115A1

    公开(公告)日：2002-02-14

    申请号：US09915781

    申请日：2001-07-26

    Inventor： Huailiang Wei

    IPC: C03C025/66

    CPC classification number: C03C3/06 ,  C03B37/01433 ,  C03B2201/10 ,  C03B2201/12 ,  C03B2201/28 ,  C03B2201/30 ,  C03B2201/31 ,  C03B2201/34 ,  C03B2201/36 ,  C03B2201/50 ,  C03B2201/54 ,  C03C23/0095 ,  C03C2201/12 ,  C03C2201/31 ,  C03C2201/34 ,  C03C2203/50

    Abstract: A method that provides a new way to embed rare earth fluorides into silicate (or germania-doped silica) glasses by means of solution chemistry. Embedding rare earth fluorides into a silicate (or germania-doped silica) glass comprises the following steps. First, form a porous silicate core preform. Second, submerge the preform into an aqueous solution of rare earth ions. Third, remove the preform from the solution and wash the outside surfaces of the preform. Fourth, submerge the preform into an aqueous solution of a fluorinating agent to precipitate rare earth trifluorides from the solution and deposit in the pores or on the wall of the preform. This is followed by drying.

    Abstract translation: 一种通过溶液化学提供将稀土氟化物嵌入硅酸盐（或氧化锗掺杂二氧化硅）玻璃的新方法的方法。 将稀土氟化物嵌入硅酸盐（或掺锗二氧化硅）玻璃中包括以下步骤。 首先，形成多孔硅酸盐芯预制件。 第二，将预成型件浸入稀土离子的水溶液中。 第三，从溶液中取出预型件并洗涤预成型件的外表面。 第四，将预制件浸入氟化剂的水溶液中以从溶液中沉淀出稀土三氟化物，并沉积在预制件的孔或壁上。 然后干燥。

    Rare earth doped optical fibre amplifiers
    258.
    发明授权
    Rare earth doped optical fibre amplifiers 失效
    稀土掺杂光纤放大器

    公开(公告)号：US5491581A

    公开(公告)日：1996-02-13

    申请号：US154957

    申请日：1993-11-19

    Applicant: Giacomo S. Roba

    Inventor： Giacomo S. Roba

    IPC: G02B6/00 ,  C03B37/018 ,  C03C13/04 ,  G02B6/036 ,  G02F1/35 ,  H01S3/067 ,  H01S3/08 ,  H01S3/094 ,  H01S3/16 ,  H01S3/06

    CPC classification number: G02B6/0365 ,  C03B37/01807 ,  C03B37/01838 ,  C03C13/046 ,  G02B6/03644 ,  H01S3/06708 ,  C03B2201/10 ,  C03B2201/12 ,  C03B2201/14 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2201/34 ,  C03B2201/36 ,  C03B2203/22 ,  H01S3/06729 ,  H01S3/094011 ,  H01S3/1691

    Abstract: An optical amplifier which includes an optical fiber having an erbium doped core surrounded by cladding, a pump for pumping the fiber with pump light at a pump wavelength coupled to the fiber, input means for inputting a signal to be amplified to the amplifier and output means for outputting an amplified signal from the amplifier. The fiber has a NA higher than 0.2. The difference in the coefficient of thermal expansion of the core adjacent the core/cladding interface and the coefficient of thermal expansion of the cladding at at least one radius less than 2 .mu.m from said interface is lower than a predetermined value, corresponding to a ratio of erbium loss to background loss, at said pump wavelength, and greater than a minimum ratio of about 20 when erbium loss is 0.15 dB/m and about 120 when erbium loss is 3.5 dB/m.

    Abstract translation: 一种光放大器，包括具有被包层包围的掺铒芯的光纤，用于以耦合到光纤的泵浦波长的泵浦光泵浦光纤的泵，用于将放大的信号输入到放大器和输出装置的输入装置 用于从放大器输出放大的信号。 纤维的NA高于0.2。 在距离所述界面的小于2μm的至少一个半径处，与芯/包覆界面相邻的芯部的热膨胀系数与包层的热膨胀系数的差异小于预定值， 在铒损耗为0.15dB / m时，铒损耗与背景损耗相比，在铒损耗为3.5dB / m时，大于20左右的最小比。

    Method of making polarization retaining fiber
    259.
    发明授权
    Method of making polarization retaining fiber 失效
    制造极化保持纤维的方法

    公开(公告)号：US5180410A

    公开(公告)日：1993-01-19

    申请号：US560090

    申请日：1990-07-30

    Applicant: George E. Berkey

    Inventor： George E. Berkey

    IPC: C03B37/012 ,  C03B37/014 ,  C03B37/02 ,  G02B6/024

    CPC classification number: C03B37/01493 ,  C03B37/01446 ,  C03B37/01473 ,  C03B2201/10 ,  C03B2201/12 ,  C03B2201/34 ,  C03B2201/40 ,  C03B2201/42 ,  C03B2203/30

    Abstract: A method of making an optical fiber having an oblong core comprising the steps of depositing layers of core glass particles and cladding glass particles on an enlarged mandrel, removing the mandrel to form a tubular porous preform, consolidating the porous preform to form a dense glass preform, evacuating the central hole of the dense glass preform while stretching that preform to collapse the central hole thereof and form a flattened rod, applying cladding material to the rod, and drawing the resultant composite to form an optical fiber. To facilitate the flat collapse of the central hole of the dense glass preform and to cause the core to have a large aspect ratio, the inside diameter-to-outside diameter ratio of the dense glass preform should be within the range of 0.3 to 0.9. For preferred core and cladding glasses, this ratio should be between 0.5 and 0.6. Also, the mandrel diameter should be at least 12 mm, and it is preferably between 25 mm and 50 mm.

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