公开(公告)号：US11795097B2

公开(公告)日：2023-10-24

申请号：US16869076

申请日：2020-05-07

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Keiichi Aiso ,  Tomohiro Gonda

IPC: C03B37/014 ,  C03B37/012 ,  C03B37/018 ,  C03B37/025

CPC classification number: C03B37/01446 ,  C03B37/014 ,  C03B37/018 ,  C03B37/01228 ,  C03B37/01231 ,  C03B37/01248 ,  C03B37/01257 ,  C03B37/01413 ,  C03B37/01466 ,  C03B37/025 ,  C03B2201/075 ,  C03B2201/50 ,  C03B2207/34

Abstract: A method of producing an optical fiber preform includes a silica glass body forming step of forming a silica glass body to be at least a portion of a core portion. The method includes an alkali-metal-doped silica glass body forming step of forming an alkali-metal-doped silica glass body doped with an alkali metal around the silica glass body such that the alkali-metal-doped silica glass body contacts the silica glass body. The method further includes a diffusing step of diffusing the alkali metal from the alkali-metal-doped silica glass body to the silica glass body by a heat treatment.

公开(公告)号：US20190016630A1

公开(公告)日：2019-01-17

申请号：US16031319

申请日：2018-07-10

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Keisei MORITA ,  Yoshiaki TAMURA ,  Hirotaka SAKUMA

IPC: C03C13/04

CPC classification number: C03C13/046 ,  C03B37/01228 ,  C03B37/0124 ,  C03B37/01248 ,  C03B2201/12 ,  C03B2201/20 ,  C03B2201/50 ,  C03B2201/54 ,  C03B2203/29 ,  C03C3/06 ,  C03C13/045 ,  C03C2201/11 ,  C03C2201/12 ,  C03C2201/50 ,  C03C2201/54

Abstract: An optical fiber preform includes a silica-glass core portion, and a cladding portion surrounding the core portion, the cladding portion being composed of a fluorine-containing silica glass having a lower refractive index than the core portion, the core portion including a first region that does not include the central axis thereof, the first region containing a first dopant selected from sodium, potassium, and compounds thereof, and a second region that includes the central axis, the second region containing a second dopant that reduces the viscosity of the silica glass, the second dopant having a diffusion coefficient of 1×10−12 cm2/s or more and less than the first dopant at 2,000° C. to 2,300° C., in which the entire core portion has an average first dopant concentration of 10 atomic ppm or more and 2,000 atomic ppm or less and an average second dopant concentration of 10 atomic ppm or more.

公开(公告)号：US20180036945A1

公开(公告)日：2018-02-08

申请号：US15553618

申请日：2016-02-23

Applicant: Corning Incorporated

Inventor： Jean-Pierre Henri René Lereboullet ,  Michel Prassas

IPC: B29C64/165 ,  C03B32/00 ,  B28B1/00 ,  B33Y10/00 ,  B33Y70/00 ,  C03B19/06 ,  C04B35/622

CPC classification number: B29C64/165 ,  B28B1/001 ,  B29C64/205 ,  B33Y10/00 ,  B33Y70/00 ,  C03B19/06 ,  C03B19/063 ,  C03B32/00 ,  C03B32/005 ,  C03B2201/02 ,  C03B2201/10 ,  C03B2201/50 ,  C04B35/622

Abstract: Additive manufacturing processes for making transparent three-dimensional parts from inorganic material powders involve selective use of vacuum to remove or avoid trapped bubbles in the parts.

公开(公告)号：US20170297947A1

公开(公告)日：2017-10-19

申请号：US15337591

申请日：2016-10-28

Applicant: Corning Incorporated

Inventor： Kenneth Duane Billings ,  Dana Craig Bookbinder ,  Paul Andrew Chludzinski ,  Robert Clark Moore ,  Pushkar Tandon

IPC: C03B37/025 ,  G02B6/02 ,  C03C25/10 ,  G02B6/036

CPC classification number: C03B37/02718 ,  C03B37/0253 ,  C03B37/02727 ,  C03B37/029 ,  C03B37/032 ,  C03B2201/02 ,  C03B2201/12 ,  C03B2201/20 ,  C03B2201/31 ,  C03B2201/50 ,  C03B2203/224 ,  C03B2203/24 ,  C03B2203/26 ,  C03B2205/42 ,  C03B2205/44 ,  C03B2205/55 ,  C03B2205/56 ,  C03B2205/60 ,  C03C25/106 ,  G02B6/02004 ,  G02B6/02009 ,  G02B6/0281 ,  G02B6/03622 ,  G02B6/03627 ,  G02B6/03633 ,  G02B6/03694

Abstract: According to some embodiments a method of processing an optical fiber comprises the steps of: (i) drawing the fiber at a drawing rate of at least 30 m/sec; and (ii) cooling the drawn fiber in a gas at an average cooling rate less than 5000° C./s, such that said cooling reduces the temperature of the fiber from an entering temperature in the range between 1500° C. and 1700° C. to another temperature in the range between 1200° C. and 1400° C., the gas being at a temperature between 800° C. and 1500° C.; and the thermal conductivity κ of the gas being not greater than 1.5×10−4 cal/cm-s-K for at least one temperature within a range of 800° C. to 1500° C. at one atm (atmosphere) pressure absolute.

公开(公告)号：US09611169B2

公开(公告)日：2017-04-04

申请号：US14958024

申请日：2015-12-03

Applicant: Corning Incorporated

Inventor： Sezhian Annamalai ,  Carlos Alberto Duran ,  Kenneth Edward Hrdina

IPC: C03C3/06 ,  C03B19/14 ,  C03B25/02 ,  C03C3/112 ,  C03C4/00

CPC classification number: C03C3/06 ,  C03B19/1453 ,  C03B19/1461 ,  C03B25/02 ,  C03B2201/07 ,  C03B2201/075 ,  C03B2201/12 ,  C03B2201/14 ,  C03B2201/23 ,  C03B2201/32 ,  C03B2201/40 ,  C03B2201/42 ,  C03B2201/50 ,  C03B2201/54 ,  C03C3/112 ,  C03C4/00 ,  C03C2201/12 ,  C03C2201/14 ,  C03C2201/32 ,  C03C2201/40 ,  C03C2201/42 ,  C03C2201/50 ,  C03C2201/54 ,  C03C2203/52

Abstract: A doped silica-titania glass article is provided that includes a glass article having a glass composition comprising (i) a silica-titania base glass, (ii) a fluorine dopant, and (iii) a second dopant. The fluorine dopant has a concentration of fluorine of up to 5 wt. % and the second dopant comprises one or more oxides selected from the group consisting of Al, Nb, Ta, B, Na, K, Mg, Ca and Li oxides at a total oxide concentration from 50 ppm to 6 wt. %. Further, the glass article has an expansivity slope of less than 0.5 ppb/K2 at 20° C. The second dopant can be optional. The composition of the glass article may also contain an OH concentration of less than 100 ppm.

公开(公告)号：US20170022094A1

公开(公告)日：2017-01-26

申请号：US15086169

申请日：2016-03-31

Applicant: OFS Fitel, LLC

Inventor： Man F. Yan ,  Peter I. Borel ,  Tommy Geisler ,  Rasmus V. Jensen ,  Ole A. Levring ,  Jorgen Ostgaard Olsen ,  David W. Peckham ,  Dennis J. Trevor ,  Patrick W. Wisk ,  Benyuan Zhu

IPC: C03C13/04 ,  C03B37/027 ,  G02B6/036

CPC classification number: C03C13/046 ,  C03B37/01208 ,  C03B37/01853 ,  C03B37/027 ,  C03B2201/07 ,  C03B2201/08 ,  C03B2201/12 ,  C03B2201/20 ,  C03B2201/28 ,  C03B2201/50 ,  C03B2203/223 ,  C03B2203/23 ,  C03C3/06 ,  C03C4/10 ,  C03C13/045 ,  C03C2201/11 ,  C03C2201/12 ,  C03C2201/28 ,  C03C2201/50 ,  G02B6/03627 ,  G02B6/0365

Abstract: An optical fiber has a core region that is doped with one or more viscosity-reducing dopants in respective amounts that are configured, such that, in a Raman spectrum with a frequency shift of approximately 600 cm−, the fiber has a nanoscale structure having an integrated D2 line defect intensity of less than 0.025. Alternatively, the core region is doped with one or more viscosity-reducing dopants in respective amounts that are configured such that the fiber has a residual axial compressive stress with a stress magnitude of more than 20 MPa and a stress radial extent between 2 and 7 times the core radius.According to another aspect of the invention a majority of the optical propagation through the fiber is supported by an identified group of fiber regions comprising the core region and one or more adjacent cladding regions. The fiber regions are doped with one or more viscosity-reducing dopants in respective amounts and radial positions that are configured to achieve viscosity matching among the fiber regions in the identified group.

Abstract translation: 根据本发明的另一方面，通过光纤的大部分光学传播由包括芯区域和一个或多个相邻包层区域的所识别的纤维区域组支撑。 纤维区域掺杂有相应量和径向位置中的一种或多种降低粘度的掺杂剂，其被配置为实现所识别的组中的纤维区域之间的粘度匹配。

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：US20160168007A1

公开(公告)日：2016-06-16

申请号：US14970642

申请日：2015-12-16

Applicant: CORNING INCORPORATED

Inventor： Raymond D. Groh ,  Ming-Jun Li ,  Alper Ozturk ,  Chunfeng Zhou

IPC: C03B37/014 ,  C03B37/012

CPC classification number: C03B37/01486 ,  C03B37/01225 ,  C03B37/01446 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2201/32 ,  C03B2201/42 ,  C03B2201/50

Abstract: A method for forming an optical fiber preform is provided. The method includes inserting a glass core cane into a glass sleeve such that the glass sleeve surrounds a portion of the glass core cane and such that there is a gap between the glass sleeve and the portion of the glass core cane surrounded by the glass sleeve. The method further includes depositing silica soot onto at least a portion of the glass core cane and at least a portion of the glass sleeve to form a silica soot preform, and flowing gas through the gap during processing of the silica soot preform.

Abstract translation: 提供了一种用于形成光纤预制棒的方法。 该方法包括将玻璃芯杖插入玻璃套筒中，使得玻璃套筒围绕玻璃芯杖的一部分，并且玻璃套筒与由玻璃套筒包围的玻璃芯杖的部分之间存在间隙。 该方法还包括将二氧化硅烟灰沉积在至少一部分玻璃芯棒和玻璃套筒的至少一部分上以形成二氧化硅烟炱预制件，以及在二氧化硅烟炱预制件的加工期间使气体流过间隙。

公开(公告)号：US09322990B2

公开(公告)日：2016-04-26

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 ,  C03B37/012 ,  C03B37/014 ,  C03B37/018 ,  C03B37/027 ,  C03C13/04

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。

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。