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    METHOD FOR PRODUCING OPTICAL FIBER PREFORM
    51.
    发明申请
    METHOD FOR PRODUCING OPTICAL FIBER PREFORM 审中-公开
    生产光纤预制件的方法

    公开(公告)号：US20120198892A1

    公开(公告)日：2012-08-09

    申请号：US13363748

    申请日：2012-02-01

    Applicant: Yoshiaki TAMURA ,  Masaaki Hirano ,  Tetsuya Haruna

    Inventor： Yoshiaki TAMURA ,  Masaaki Hirano ,  Tetsuya Haruna

    IPC: C03B37/012

    CPC classification number: C03B37/01861 ,  C03B37/01228 ,  C03B37/01869 ,  C03B2201/07 ,  C03B2201/075 ,  C03B2201/12 ,  C03B2201/20 ,  C03B2201/50

    Abstract: A method for producing an optical fiber preform according to the present invention includes an etching step of heating a silica-based glass tube using a heat source continuously traversed in the longitudinal direction of the glass tube to etch the inner surface portion of the glass tube containing impurities while an etching gas is allowed to flow into the glass tube. The glass tube has a maximum alkali metal concentration of 500 to 20,000 atomic ppm, a maximum chlorine concentration of 0 to 1000 atomic ppm, and a maximum fluorine concentration of 0 to 10,000 atomic ppm. In the etching step, the maximum temperature of the outer surface of the glass tube is in the range of 1900° C. to 2250° C., and the heating time is set to a time equal to or less than a time (min) given by ( 7 - alkai   metal   concentration   ppm 5000 ) .

    Abstract translation: 根据本发明的光纤预制棒的制造方法包括：蚀刻步骤，使用在玻璃管的纵向连续穿过的热源来加热二氧化硅基玻璃管，以蚀刻含有玻璃管的玻璃管的内表面部分 允许蚀刻气体流入玻璃管中的杂质。 玻璃管的碱金属浓度最高为500〜20,000原子ppm，最大氯浓度为0〜1000原子ppm，最大氟浓度为0〜10,000原子ppm。 在蚀刻步骤中，玻璃管的外表面的最高温度在1900℃至2250℃的范围内，加热时间设定为等于或小于时间（分钟）的时间， 由（7-烷烃金属浓度ppm ppm 5000）给出。

    Optical fiber containing alkali metal oxide
    53.
    发明申请
    Optical fiber containing alkali metal oxide 有权
    含有碱金属氧化物的光纤

    公开(公告)号：US20070297735A1

    公开(公告)日：2007-12-27

    申请号：US11801472

    申请日：2007-05-10

    Applicant: Rostislav Radievich Khrapko ,  Hazel B. Matthews

    Inventor： Rostislav Radievich Khrapko ,  Hazel B. Matthews

    IPC: G02B6/036 ,  G02B6/02

    CPC classification number: G02B6/02 ,  C03B37/01446 ,  C03B37/01453 ,  C03B37/01807 ,  C03B2201/12 ,  C03B2201/20 ,  C03B2201/50 ,  C03B2203/26 ,  C03B2203/29 ,  C03C3/06 ,  C03C2201/11 ,  C03C2201/12 ,  C03C2201/50 ,  G02B6/02014 ,  G02B6/02266

    Abstract: Disclosed is an optical fiber having a silica-based core comprising an alkali metal oxide selected from the group consisting of K2O, Na2O, LiO2, Rb2O, Cs2O and mixtures thereof in an average concentration in said core between about 50 and 500 ppm by weight, said core further comprising chlorine and fluorine, wherein the average concentration of fluorine in said core is greater than the average concentration of alkali metal oxide in said core and the average concentration of chlorine in said core is greater than the average concentration of alkali metal oxide in said core; and a silica-based cladding surrounding and directly adjacent the core. By appropriately selecting the concentration of alkali metal oxide dopant in the core and the cladding, a low loss optical fiber may be obtained.

    Abstract translation: 公开了一种光纤，其具有二氧化硅基核，其包含选自K 2 O 2，Na 2 O，LiO 2 O 2的碱金属氧化物， 其中所述核心中的平均浓度为约50-500ppm（重量），所述核心还包含氯和/或 氟，其中所述芯中的氟的平均浓度大于所述芯中的碱金属氧化物的平均浓度，并且所述芯中的平均氯浓度大于所述芯中碱金属氧化物的平均浓度; 以及围绕并直接邻近芯的二氧化硅基包层。 通过适当地选择芯和包层中的碱金属氧化物掺杂剂的浓度，可以获得低损耗光纤。

    Alkali and fluorine doped optical fiber
    55.
    发明授权
    Alkali and fluorine doped optical fiber 有权
    碱和氟掺杂光纤

    公开(公告)号：US07088900B1

    公开(公告)日：2006-08-08

    申请号：US11106860

    申请日：2005-04-14

    Applicant: Snigdharaj Kumar Mishra

    Inventor： Snigdharaj Kumar Mishra

    IPC: G02B6/00

    CPC classification number: C03C3/06 ,  C03B37/01446 ,  C03B37/01453 ,  C03B37/01807 ,  C03B2201/12 ,  C03B2201/20 ,  C03B2201/50 ,  C03B2207/90 ,  G02B6/02242 ,  G02B6/0281 ,  G02B6/0285 ,  G02B6/0286 ,  G02B6/03633 ,  G02B6/0365

    Abstract: Disclosed is an optical fiber having a core of SiO2 doped with fluorine and an alkali metal oxide dopant. The alkali metal oxide is selected from the group consisting of K, Na, Li, Cs and Rb and is provided in amount of at least 20 ppm wt. %. The fiber has an inner cladding surrounding the core, which also includes fluorine. A relative refractive index of the inner cladding (Δ2%), measured relative to pure silica, is preferably between −0.39% and −0.7%. The fiber preferably exhibits attenuation at 1550 nm of less than or equal to 0.178 dB/km.

    Abstract translation: 公开了一种具有掺杂有氟和碱金属氧化物掺杂剂的SiO 2核的光纤。 碱金属氧化物选自K，Na，Li，Cs和Rb，其量为至少20ppm重量。 ％。 纤维具有围绕芯的内包层，其还包括氟。 相对于纯二氧化硅测量的内包层的相对折射率（ΔL2％）优选在-0.39％和-0.7％之间。 纤维优选在1550nm处表现出小于或等于0.178dB / km的衰减。

    Method of making an optical fiber preform
    58.
    发明申请
    Method of making an optical fiber preform 审中-公开
    制造光纤预制棒的方法

    公开(公告)号：US20050144986A1

    公开(公告)日：2005-07-07

    申请号：US10750384

    申请日：2003-12-30

    Applicant: Dana Bookbinder ,  Lisa Chacon ,  Adam Ellison ,  Gregory Gausman ,  Michael Murtagh ,  William Whedon

    Inventor： Dana Bookbinder ,  Lisa Chacon ,  Adam Ellison ,  Gregory Gausman ,  Michael Murtagh ,  William Whedon

    IPC: C03B37/012 ,  C03B37/028

    CPC classification number: C03B37/01211 ,  C03B2201/50 ,  C03B2203/29

    Abstract: A method for manufacturing an optical fiber preform and fiber. According to the method, a first glass rod is formed, preferably by an OVD method, with a refractive index delta preferably between 0.2% and 3%. A glass sleeve tube is formed, preferably by an MCVD or PVCD method. The first glass rod is inserted into the sleeve and an alkali metal vapor is flowed between the sleeve tube and the first glass rod. Additional glass may optionally be formed on the inside surface of the sleeve tube prior to inserting the first glass rod and flowing the alkali metal vapor. The additional glass may be up-doped, down-doped, or both. The sleeve may then be collapsed onto the first glass rod to form a second glass rod doped with an alkali metal oxide. The second glass rod is drawn to form a third glass rod. Additional glass may then be formed on the third glass rod to form an optical fiber preform from which optical fiber may be drawn. Alternatively, the first glass rod is removed from the sleeve tube after flowing the alkali metal vapor and before the collapse step, after which additional glass may be formed on the first glass rod to form an optical fiber preform.

    Abstract translation: 一种用于制造光纤预制件和纤维的方法。 根据该方法，优选通过OVD方法形成第一玻璃棒，折射率Δ优选在0.2％至3％之间。 优选通过MCVD或PVCD方法形成玻璃套管。 将第一玻璃棒插入套管中，并且在套管和第一玻璃棒之间流过碱金属蒸气。 在插入第一玻璃棒并使碱金属蒸气流动之前，另外的玻璃可任选地形成在套管的内表面上。 附加的玻璃可以是上掺杂的，下掺杂的或两者的。 然后可以将套筒折叠到第一玻璃棒上以形成掺杂有碱金属氧化物的第二玻璃棒。 第二玻璃棒被拉伸以形成第三玻璃棒。 然后可以在第三玻璃棒上形成另外的玻璃，以形成可从中拉出光纤的光纤预成型件。 或者，在使碱金属蒸气流动并在崩溃步骤之前，将第一玻璃棒从套筒管中移除，之后可以在第一玻璃棒上形成另外的玻璃以形成光纤预制件。

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