公开(公告)号：US20140137604A1

公开(公告)日：2014-05-22

申请号：US14163433

申请日：2014-01-24

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Tetsuya NAKANISHI ,  Masaaki HIRANO ,  Tetsuya HARUNA ,  Maki IKECHI

IPC: C03B37/027

CPC classification number: C03B37/02727 ,  C03B2203/19 ,  C03B2203/222 ,  G02B6/02 ,  G02B6/02366 ,  G02B6/03627 ,  G02B6/0365 ,  G02B6/03694

Abstract: An optical fiber having excellent strength that can be manufactured at low cost, as well as a method for making such optical fiber, is provided. An optical fiber 1 is a silica-based optical fiber comprising a core 11, an optical cladding 12 surrounding the core & 11, and a jacketing region 13 surrounding the optical cladding 12 and having a uniform composition throughout from the internal circumference to the outer circumference. A compressive strained layer having a residual compressive stress is provided at the outermost circumference of the jacketing region 13.

Abstract translation: 提供了具有可以低成本制造的优异强度的光纤以及制造这种光纤的方法。 光纤1是基于二氧化硅的光纤，其包括芯11，围绕芯部11的光学包层12以及包围光学包层12并具有从内周到外周均匀组成的护套区域13 。 在护套区域13的最外周设有具有残余压应力的压应变层。

公开(公告)号：US20170305781A1

公开(公告)日：2017-10-26

申请号：US15645303

申请日：2017-07-10

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Tetsuya HARUNA ,  Yoshiaki TAMURA ,  Yoshihiro TUKUDA

IPC: C03C3/06 ,  C03C25/68 ,  C03B37/014 ,  C03B37/018 ,  G02B6/036

CPC classification number: G02B6/03694 ,  C03B37/01446 ,  C03B37/01466 ,  C03B37/01473 ,  C03B37/018 ,  C03B2203/22 ,  C03C3/06 ,  C03C13/045 ,  C03C17/02 ,  C03C25/68 ,  C03C2201/50

Abstract: One of embodiments relates to an optical fiber in which an alkali metal element is efficiently doped to its core to suppress transmission loss from increasing. A mean concentration or a concentration distribution of the alkali metal element is adjusted such that 0.48 or less is obtained as an weighted value obtained by weighting a distribution of field intensity of guided light at a wavelength of 1550 nm, with respect to a radial direction distribution of a ratio ID2/Iω3 of an intensity ID2 of Raman scattering light by a silica three-membered ring structure and an intensity Iω3 of Raman scattering light by a Si—O stretching vibration, in a cross-sectional region having a diameter of 20 μm.

公开(公告)号：US20170057867A1

公开(公告)日：2017-03-02

申请号：US15351782

申请日：2016-11-15

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Tetsuya HARUNA ,  Masaaki HIRANO ,  Yoshiaki TAMURA ,  Tetsuya NAKANISHI

IPC: C03C13/04 ,  C03B37/027

CPC classification number: C03C13/046 ,  C03B37/02727 ,  C03B2201/50 ,  C03B2205/55 ,  C03B2205/56 ,  C03C3/06 ,  C03C13/045 ,  C03C2201/21 ,  C03C2201/23 ,  C03C2201/50 ,  C03C2203/54 ,  G02B6/02395 ,  Y02P40/57

Abstract: There is provided a method for producing a low-loss alkali metal-doped silica core optical fiber having excellent hydrogen resistance. The method for producing the optical fiber according to the present invention includes a drawing step of drawing an optical fiber preform in a drawing furnace to produce a silica glass-based optical fiber including a core region containing an alkali metal with an average concentration of 0.5 atomic ppm or more and a cladding region that surrounds the core region and a heating step of heating the optical fiber in a heating furnace through which the optical fiber drawn from the drawing furnace passes.

Abstract translation: 提供了具有优异的耐氢性的低损耗碱金属掺杂的硅芯光纤的制造方法。 根据本发明的光纤的制造方法包括在拉拔炉中拉制光纤预制件的拉拔工序，制造出含有平均浓度为0.5原子的碱金属的核心区域的石英玻璃基光纤 ppm以上的包层区域和包围芯区域的包层区域以及在从拉拔炉抽出的光纤通过的加热炉中加热光纤的加热工序。

公开(公告)号：US20230382780A1

公开(公告)日：2023-11-30

申请号：US18246730

申请日：2021-09-27

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Tetsuya HARUNA ,  Shinji ISHIKAWA ,  Keisei MORITA ,  Tatsuro HASEGAWA ,  Seiji ARAKAWA

IPC: C03B37/014

CPC classification number: C03B37/01453 ,  C03B2201/12

Abstract: A method for producing a fluorine-containing silica glass includes degassing which includes degassing an inside of a furnace core tube under reduced pressure while heating the inside of the furnace core tube, after inserting a porous silica glass body into the furnace core tube provided in an airtight container, supplying which includes degassing a fluorine compound gas into the furnace core tube under reduced pressure, fluorine adding which includes heat-treating the porous silica glass body under reduced pressure while supplying the fluorine compound gas into the furnace core tube and discharging a gas from the furnace core tube, and transparent vitrifying which includes heat-treating in a reduced pressure at a temperature higher than temperatures in the degassing process and the fluorine adding process.

公开(公告)号：US20170108642A1

公开(公告)日：2017-04-20

申请号：US15290105

申请日：2016-10-11

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Yoshiaki TAMURA ,  Tetsuya HARUNA ,  Masaaki HIRANO ,  Hirotaka SAKUMA

IPC: G02B6/036 ,  C03C13/04

CPC classification number: G02B6/03694 ,  C03C13/045 ,  C03C13/046 ,  C03C2201/11 ,  C03C2201/12 ,  C03C2201/50 ,  C03C2201/54 ,  C03C2213/00 ,  G02B6/03611

Abstract: An optical fiber having a reduced attenuation includes a silica glass core and a silica glass cladding. The silica glass core has substantially no germanium and includes a first core and a second core. The second core encloses the first core, the refractive index of the second core is larger than the refractive index of the first core, and the average value of halogen concentration of the second core is 5000 ppm or more. The silica glass cladding surrounds the second core and contains substantially no gemianium. The refractive index of the cladding is smaller than the refractive index of the first core.

公开(公告)号：US20160147010A1

公开(公告)日：2016-05-26

申请号：US14943190

申请日：2015-11-17

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Yoshiaki TAMURA ,  Tetsuya HARUNA ,  Yoshihiro SAITO ,  Yuki KAWAGUCHI ,  Masaaki HIRANO

IPC: G02B6/02

CPC classification number: G02B6/02 ,  C03B37/01211 ,  C03B37/014 ,  C03B37/01807 ,  C03B37/01861 ,  C03B37/01892 ,  C03B2201/06 ,  C03B2201/07 ,  C03B2201/12 ,  C03B2201/20 ,  C03B2201/50 ,  C03B2203/22 ,  C03B2203/26 ,  C03B2205/40 ,  C03C3/06 ,  C03C13/045 ,  C03C2201/11 ,  C03C2201/12 ,  C03C2201/50 ,  C03C2203/40

Abstract: An optical fiber containing an alkali metal and capable of reducing Rayleigh scattering loss is provided. An optical fiber has a core and a cladding made of silica glass and enclosing the core. The cladding contains fluorine and has a refractive index lower than the refractive index of the core. The core contains first group dopants selected from the group of Na element, K element, or a compound thereof at an average concentration of 0.2 ppm or more and 10 ppm or less. The core also contains second group dopants for reducing the viscosity of silica glass and having a diffusion coefficient of 1×10−12 cm2/s or more and smaller than the diffusion coefficient of the first group dopants, by an average concentration of 0.2 ppm or more at a temperature of 2000° C. to 2300° C.

Abstract translation: 提供含有碱金属并能够降低瑞利散射损失的光纤。 光纤具有由石英玻璃制成的芯和包层，并且包围芯。 包层含氟，折射率低于芯的折射率。 核心包含平均浓度为0.2ppm以上且10ppm以下的选自Na元素，K元素或其化合物的第一族掺杂剂。 该芯还含有第二组掺杂剂，用于降低石英玻璃的粘度，并且扩散系数为1×10-12cm2 / s以上且小于第一组掺杂剂的扩散系数，平均浓度为0.2ppm或 更高温度在2000°C至2300°C

公开(公告)号：US20150299022A1

公开(公告)日：2015-10-22

申请号：US14376929

申请日：2012-12-13

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Masaaki HIRANO ,  Tetsuya HARUNA ,  Yoshiaki TAMURA

IPC: C03B37/018 ,  G02B6/02

CPC classification number: C03B37/01815 ,  C03B37/01807 ,  C03B2201/075 ,  C03B2201/08 ,  C03B2201/12 ,  C03B2201/20 ,  C03B2201/50 ,  C03B2207/90 ,  G02B6/02

Abstract: A method includes (1) a thermal diffusion process for using an alkali metal salt raw material having an average particle size of 1 mm or less in diameter, supplying a vapor of the alkali metal salt produced by heating the alkali metal salt raw material together with a carrier gas to the inside of a silica-based glass pipe from one end side of the glass pipe, and heating the glass pipe using a heat source which relatively moves in a longitudinal direction of the glass pipe to cause an oxidation reaction of an alkali metal and thermally diffuse the alkali metal into an inner side of the glass pipe, (2) a collapsing process for collapsing the glass pipe after the thermal diffusion process to prepare a core rod; and (3) a cladding portion addition process for adding a cladding portion around the core rod prepared in the collapsing process.

Abstract translation: 一种方法包括：（1）使用平均粒径为1mm以下的碱金属盐原料的热扩散法，将碱金属盐原料加热生成的碱金属盐蒸气与 从玻璃管的一端侧向二氧化硅系玻璃管的内部输送载气，使用在玻璃管的长度方向相对移动的热源来加热玻璃管，引起碱的氧化反应 金属并将碱金属热扩散到玻璃管的内侧，（2）在热扩散过程之后使玻璃管塌缩的塌缩过程以制备芯棒; 和（3）包层部分添加工艺，用于在折叠过程中制备的芯棒周围添加包层部分。

公开(公告)号：US20160318793A1

公开(公告)日：2016-11-03

申请号：US15137255

申请日：2016-04-25

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Yoshiaki TAMURA ,  Tetsuya HARUNA ,  Yuki KAWAGUCHI

IPC: C03C13/04 ,  C03B37/014

CPC classification number: C03C13/046 ,  C03B37/01211 ,  C03B37/01237 ,  C03B37/0124 ,  C03B37/014 ,  C03B37/01807 ,  C03B37/01861 ,  C03B2201/12 ,  C03B2201/20 ,  C03B2201/50 ,  C03B2201/54 ,  C03B2203/22 ,  C03B2203/222 ,  C03C2201/12 ,  C03C2201/50 ,  C03C2201/54

Abstract: An optical fiber preform of the present embodiment comprises a core portion and a cladding each comprised of silica glass. The core portion has a first dopant region including a central axis of the core portion and a second dopant region away from the central axis. The first dopant region contains a first dopant selected from among Na, K, and their compounds, and a concentration of the first dopant is 10 atomic ppm or more but 2,000 atomic ppm or less. The second dopant region contains a second dopant reducing viscosity of the silica glass. The second dopant has, as a characteristic at a temperature of 2,000° C. to 2,300° C., a diffusion coefficient of 1×10−12 cm2/s or higher but lower than that of the first dopant, and a concentration of the second dopant region is 10 atomic ppm or more.

Abstract translation: 本实施方式的光纤预制件包括由石英玻璃构成的芯部和包层。 芯部分具有包括芯部分的中心轴线和远离中心轴线的第二掺杂剂区域的第一掺杂区域。 第一掺杂剂区域含有选自Na，K及其化合物的第一掺杂剂，第一掺杂剂的浓度为10原子ppm以上且2000原子ppm以下。 第二掺杂剂区域包含第二掺杂剂，降低石英玻璃的粘度。 作为在2000℃〜2300℃的温度下的特性，第二掺杂剂的扩散系数为1×10-12 cm 2 / s以上但比第一掺杂剂低的扩散系数， 第二掺杂剂区域为10原子ppm以上。

公开(公告)号：US20150370008A1

公开(公告)日：2015-12-24

申请号：US14765110

申请日：2014-01-28

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Yoshiaki TAMURA ,  Tetsuya HARUNA ,  Masaaki HIRANO

IPC: G02B6/02 ,  C03B37/018 ,  C03B37/012

CPC classification number: G02B6/0229 ,  C03B37/01248 ,  C03B37/01807 ,  C03B37/01869 ,  C03B2201/20 ,  C03B2201/50 ,  C03B2203/22 ,  C03B2203/23 ,  C03C13/045 ,  C03C2201/11 ,  C03C2201/50 ,  G02B6/02395

Abstract: An optical fiber preform which can be drawn into a low attenuation optical fiber is provided with a core portion and a cladding portion surrounding the core portion. The core portion includes a first core portion and a second core portion surrounding the first core portion. The cladding portion includes a first cladding portion surrounding the second core portion and a second cladding portion surrounding the first cladding portion. The first core portion contains an alkali metal element, the concentration of oxygen molecules contained in glass is 30 mol ppb or more and 200 mol ppb or less in a part of or entire region having an alkali metal atom concentration of 100 atomic ppm or more, and the concentration of oxygen molecules contained in glass is 10 mol ppb or less in a region having an alkali metal atom concentration of 50 atomic ppm or less.

Abstract translation: 可以拉入低衰减光纤的光纤预制件设置有芯部和围绕芯部的包层部。 芯部包括第一芯部分和围绕第一芯部分的第二芯部分。 包层部分包括围绕第二芯部的第一包层部分和围绕第一包层部分的第二包层部分。 第一核心部分含有碱金属元素，在碱金属原子浓度为100原子ppm以上的部分或全部区域中，玻璃中含有的氧分子的浓度为30摩尔ppb以上且200摩尔ppb以下， 并且在碱金属原子浓度为50原子ppm以下的区域中，玻璃中含有的氧分子的浓度为10摩尔ppb以下。

公开(公告)号：US20150285992A1

公开(公告)日：2015-10-08

申请号：US14743270

申请日：2015-06-18

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Masaaki HIRANO ,  Tetsuya HARUNA ,  Yoshiaki TAMURA

IPC: G02B6/02 ,  G02B6/036

CPC classification number: G02B6/03644 ,  C03B37/01211 ,  C03B37/01228 ,  C03B37/0124 ,  C03B37/014 ,  C03B37/01807 ,  C03B37/01861 ,  C03B37/01869 ,  C03B37/027 ,  C03B2201/12 ,  C03B2201/20 ,  C03B2201/50 ,  C03B2203/22 ,  C03C13/045 ,  G02B6/02 ,  G02B6/02042 ,  G02B6/03605 ,  G02B6/03611 ,  G02B6/03627 ,  G02B6/03633 ,  G02B6/0365

Abstract: An optical fiber preform has a core portion having a first core portion including a central axis, a second core portion disposed around the first core portion, and a third core portion disposed around the second core portion. The first core portion contains 10 atomic ppm or more of an alkali metal and 10 to 600 atomic ppm of chlorine, the second core portion contains 10 atomic ppm or less of the alkali metal and 10 to 600 atomic ppm of chlorine, and the third core portion contains 10 atomic ppm or less of the alkali metal and 2,000 atomic ppm or more of chlorine. An optical fiber has a core region doped with an alkali metal and chlorine, wherein the minimum concentration of chlorine in the core region is 1,000 atomic ppm or more, and the average concentration of the alkali metal therein is 0.2 atomic ppm or more.

Abstract translation: 光纤预制件具有芯部，该芯部具有包括中心轴的第一芯部，围绕第一芯部设置的第二芯部，以及设置在第二芯部周围的第三芯部。 第一芯部包含10原子ppm以上的碱金属和10〜600原子ppm的氯，第二核部分含有10原子ppm以下的碱金属和10〜600原子ppm的氯，第三核 部分含有10原子ppm以下的碱金属和2,000原子ppm以上的氯。 光纤具有掺杂有碱金属和氯的芯区域，其中芯区域中的氯的最小浓度为1,000原子ppm以上，碱金属的平均浓度为0.2原子ppm以上。