公开(公告)号：US20020097970A1

公开(公告)日：2002-07-25

申请号：US10051143

申请日：2002-01-22

Applicant: SUMITOMO ELECTRIC INDUSTRIES, INC.

Inventor： Eisuke Sasaoka

IPC: G02B006/16 ,  G02B006/18 ,  C03B037/018

CPC classification number: C03C13/046 ,  C03B37/01446 ,  C03B2201/12 ,  C03B2201/20 ,  C03B2203/22 ,  C03C3/06 ,  C03C13/045 ,  C03C2201/11 ,  C03C2201/12 ,  G02B6/02019 ,  G02B6/02257 ,  G02B6/02266 ,  G02B6/03627

Abstract: This invention relates to an optical fiber having a structure that effectively reduces transmission loss and bending loss. An optical fiber according to this invention is an optical fiber mainly comprised of silica and including a core region and a cladding region covering the core region. The core region is doped with chlorine so as to have a refractive index higher than that of pure silica. The cladding region is doped with fluorine so as to have a refractive index lower than that of pure silica. The optical fiber, in particular, is characterized in that a peak value of a relative refractive index difference of the core region with respect to a refractive index of pure silica is 0.05% or more.

公开(公告)号：US06400878B1

公开(公告)日：2002-06-04

申请号：US09939742

申请日：2001-08-28

Applicant: Katsuya Nagayama ,  Yuichi Ohga ,  Tatsuhiko Saitoh ,  Shinji Ishikawa ,  Ichiro Tsuchiya ,  Takenori Uchiyama

Inventor： Katsuya Nagayama ,  Yuichi Ohga ,  Tatsuhiko Saitoh ,  Shinji Ishikawa ,  Ichiro Tsuchiya ,  Takenori Uchiyama

IPC: G02B602

CPC classification number: G02B6/03627 ,  C03B37/02718 ,  C03B37/029 ,  C03B37/15 ,  C03B2201/12 ,  C03B2201/20 ,  C03B2201/31 ,  C03B2203/22 ,  C03B2205/56 ,  C03C13/04 ,  G02B6/02

Abstract: An optical fiber preform 2 having a viscosity ratio R&eegr;=&eegr;0/&eegr;t of 2.5 or less between the core average viscosity &eegr;0 and the total average viscosity &eegr;t is prepared, and is drawn by a drawing furnace 11 so as to yield an optical fiber 3, which is then heated to a temperature within a predetermined range so as to be annealed by a heating furnace 21 disposed downstream the drawing furnace 11. Here, upon annealing in the heating furnace 21, the fictive temperature Tf within the optical fiber lowers, thereby reducing the Rayleigh scattering loss. At the same time, the viscosity ratio condition of R&eegr;≦2.5 restrains the stress from being concentrated into the core, thereby lowering the occurrence of structural asymmetry loss and the like. Hence, an optical fiber which can reduce the transmission loss caused by the Rayleigh scattering loss and the like as a whole, and a method of making the same can be obtained.

Abstract translation: 准备在芯平均粘度eta0与总平均粘度etat之间具有2.5或更小的粘度比Reta = eta0 / etat的光纤预制棒2，并由拉丝炉11拉伸以产生光纤3， 然后将其加热到预定范围内的温度，以便通过设置在拉丝炉11下游的加热炉21进行退火。这里，在加热炉21中退火后，光纤内的假想温度Tf降低，从而降低 瑞利散射损失。 同时，Reta <= 2.5的粘度比条件限制了应力集中到芯中，从而降低了结构不对称损失的发生等。 因此，可以获得可以降低由瑞利散射损耗等引起的传输损耗等的整体的光纤及其制造方法。

公开(公告)号：US20020041737A1

公开(公告)日：2002-04-11

申请号：US09964842

申请日：2001-09-28

Inventor： Shinji Ishikawa ,  Akira Urano ,  Masayuki Kiya

IPC: G02B006/26 ,  G02B006/255

CPC classification number: G02B6/03633 ,  C03B37/01211 ,  C03B37/01446 ,  C03B2201/20 ,  C03B2201/23 ,  C03B2201/31 ,  C03B2203/22 ,  C03C13/045 ,  G02B6/0283 ,  G02B6/03627 ,  G02B6/2835 ,  G02B6/29332

Abstract: In a single mode optical fiber employed in an optical fiber coupler, letting r be the radial distance from the optical axis center, nulln (r) be the relative refractive index difference at the position r within a core portion with reference to the refractive index of a cladding portion placed about the core portion, nullnpeak be the peak value of the relative refractive index difference nulln (r) at the position rpeak, and a be the core radius, the relative refractive index difference nulln (r) satisfies the relationship of nulln (r)nullnullnpeak null1null(r/a)3null in the range of rpeaknullrnulla; and the refractive index of the cladding portion gradually decreases outward in its radial direction.

Abstract translation: 在光纤耦合器中使用的单模光纤中，使r为距离光轴中心的径向距离，DELTAn（r）为芯部内位置r处的相对折射率差，参照折射率 围绕芯部放置的包覆部分，DELTAnpeak是位置rpeak处的相对折射率差ΔDTAn（r）的峰值，而作为芯部半径，相对折射率差DELTAn（r）满足DELTAn （r）<= DELTAnpeak [1-（r / a）3]在rpeak <= r <= a; 并且包层部的折射率在径向方向上向外逐渐减小。

公开(公告)号：US20020039477A1

公开(公告)日：2002-04-04

申请号：US09925678

申请日：2001-08-09

Applicant: Mitsubishi Cable Industries, Ltd.

Inventor： Hiroyuki Hayami ,  Terunobu Iio ,  Toshikazu Gozen ,  Hirokazu Kuzushita ,  Michitsugu Mori ,  Takashi Okamura ,  Shuichi Ohmori

IPC: G02B006/16

CPC classification number: C03C3/06 ,  C03B37/01413 ,  C03B37/01426 ,  C03B2201/07 ,  C03B2201/075 ,  C03B2201/12 ,  C03B2201/20 ,  C03B2201/23 ,  C03B2207/30 ,  C03B2207/32 ,  C03C13/045 ,  C03C2201/12 ,  C03C2201/23 ,  C03C2201/26 ,  G02B6/06

Abstract: A silica optical fiber is provided, which contains a pure-silica core and a cladding layer formed on the pure-silica core, wherein the pure-silica core contains a C element and has a content of elements belonging to the third period-the seventh period of the periodic table, except Si element that constitutes the quartz structure, of not more than 100 ppm. The present invention can provide a silica optical fiber superior in the resistance to high energy electromagnetic waves such as UV light and null-rays.

Abstract translation: 提供一种二氧化硅光纤，其包含形成在纯二氧化硅芯上的纯二氧化硅芯和包层，其中纯二氧化硅芯包含C元素，并且具有属于第三周期的元素含量 - 第七 周期表的周期，除了构成石英结构的Si元素之外，不大于100ppm。 本发明可以提供对诸如UV光和γ射线的高能电磁波的耐受性优异的二氧化硅光纤。

公开(公告)号：US5740297A

公开(公告)日：1998-04-14

申请号：US705993

申请日：1996-08-30

Applicant: Masashi Onishi ,  Chie Fukuda ,  Hiroo Kanamori

Inventor： Masashi Onishi ,  Chie Fukuda ,  Hiroo Kanamori

IPC: C03B37/012 ,  C03B37/027 ,  C03C13/04 ,  G02B6/22

CPC classification number: G02B6/02261 ,  C03B37/01211 ,  C03B37/027 ,  C03C13/045 ,  G02B6/03627 ,  G02B6/03644 ,  G02B6/03655 ,  C03B2201/12 ,  C03B2201/20 ,  C03B2201/31 ,  C03B2203/22 ,  C03B2203/222 ,  C03B2203/23 ,  C03B2203/26 ,  C03B2203/36 ,  C03C2201/11 ,  C03C2201/12 ,  C03C2201/31

Abstract: This invention relates to a dispersion-compensating fiber which can be drawn at a lower temperature and can further reduce optical transmission loss. This dispersion-compensating fiber comprises a core portion containing a high concentration of GeO.sub.2 and a cladding portion formed around the outer periphery of the core portion. The cladding portion comprises a first cladding containing fluorine or the like as an index reducer, a second cladding having a higher refractive index than that of the first cladding, and a third cladding which becomes a glass region substantially noncontributory to propagation of signal light. In particular, the third cladding contains a desired impurity such that the glass viscosity thereof becomes lower than that of the second cladding or pure silica cladding at a predetermined temperature.

Abstract translation: 本发明涉及一种可在较低温度下拉制并能进一步降低光传输损耗的色散补偿光纤。 这种色散补偿光纤包括含有高浓度GeO 2的核心部分和形成在芯部分的外周周围的包层部分。 包层部分包括含有氟等作为折射率减少器的第一包层，具有比第一包层的折射率高的第二包层，以及变成与信号光的传播基本上不相容的玻璃区域的第三包层。 特别地，第三包层包含期望的杂质，使得其玻璃粘度在预定温度下变得低于第二包层或纯二氧化硅包层的玻璃粘度。

公开(公告)号：US5735921A

公开(公告)日：1998-04-07

申请号：US762513

申请日：1996-12-10

Applicant: Roger J. Araujo ,  Nicholas F. Borrelli ,  Christine L. Hoaglin ,  Charlene Smith

Inventor： Roger J. Araujo ,  Nicholas F. Borrelli ,  Christine L. Hoaglin ,  Charlene Smith

IPC: C03B8/04 ,  C03B19/14 ,  C03B20/00 ,  C03C3/06 ,  C03B37/00 ,  C03B37/01 ,  C03B37/018 ,  G02B6/18

CPC classification number: C03B19/1453 ,  C03B19/1415 ,  C03C3/06 ,  C03B2201/02 ,  C03B2201/20 ,  C03B2207/32 ,  Y10S65/90

Abstract: The invention relates to the production of high purity fused silica glass which is highly resistant to 248 nm excimer laser-induced optical damage. In particular, this invention relates to a fused silica optical member or blank.

Abstract translation: 本发明涉及高纯度熔融石英玻璃的生产，其高度抗248nm准分子激光诱导的光学损伤。 特别地，本发明涉及熔融硅石光学构件或坯料。

公开(公告)号：US5547482A

公开(公告)日：1996-08-20

申请号：US270423

申请日：1994-07-05

Applicant: Julie B. Chalk ,  Jonathan C. Rowe ,  Paul M. Schermerhorn ,  Robert D. Shoup

Inventor： Julie B. Chalk ,  Jonathan C. Rowe ,  Paul M. Schermerhorn ,  Robert D. Shoup

IPC: C03B8/00 ,  C03B8/02 ,  C03B19/00 ,  C03B19/06 ,  C03B19/12 ,  C03B20/00 ,  C03B32/00 ,  C03C3/06

CPC classification number: C03C3/06 ,  C03B19/06 ,  C03B19/066 ,  C03B19/12 ,  C03B20/00 ,  C03B32/00 ,  C03B2201/08 ,  C03B2201/20 ,  C03B2201/28 ,  C03B2201/30 ,  C03B2201/31 ,  C03B2201/32 ,  C03B2201/34 ,  C03B2201/40 ,  C03B2201/42 ,  C03B2201/50 ,  C03B2201/54 ,  C03C2201/06 ,  C03C2201/42 ,  C03C2203/26 ,  C03C2203/27 ,  C03C2203/50 ,  Y02P40/57

Abstract: This invention is directed to the production of essentially defect-free high purity fused silica glass articles, the method comprising the following steps: (a) forming a green body from silica particulates or a porous body of amorphous silica; (b) sintering said body in a chamber by raising the temperature of the chamber to above 1720.degree. C., while purging the chamber with helium or applying a vacuum to the chamber; and (c) consolidating the sintered body in a chamber by raising the temperature within the chamber to at least 1750.degree. C., introducing an inert gas into the chamber at a pressure less than about 6.9 MPa (1000 psig), and cooling the chamber while maintaining the pressurized atmosphere to a temperature at least below the annealing point of the glass. In the most preferred practice, a green body of silica particulates will be prepared via a sol-gel process.

Abstract translation: 本发明涉及生产基本上无缺陷的高纯度熔融石英玻璃制品，该方法包括以下步骤：（a）由二氧化硅微粒或无定形二氧化硅的多孔体形成生坯; （b）通过将腔室的温度升高到1720℃以上，同时用氦气吹扫腔室或向室内施加真空来在室内烧结所述主体; 和（c）通过将室内的温度升高至至少1750℃将烧结体固化在室中，在小于约6.9MPa（1000psig）的压力下将惰性气体引入室中，并冷却室 同时将加压气氛保持在至少低于玻璃退火点的温度。 在最优选的实践中，将通过溶胶 - 凝胶法制备生物体的二氧化硅颗粒。

公开(公告)号：US20240140853A1

公开(公告)日：2024-05-02

申请号：US18374763

申请日：2023-09-29

Applicant: Shin-Etsu Chemical Co., Ltd.

Inventor： Yusuke KASHIWAGI

IPC: C03B37/014

CPC classification number: C03B37/01446 ,  C03B2201/20

Abstract: A manufacturing method of glass base material for optical fiber in which occurrence of opaque glass portion and elongation can be suppressed is provided. A preparation step of porous base material for optical fiber in which a porous glass layer is formed around the periphery of a core rod; a sintering preparation step, in which the porous base material for optical fiber is hung in a furnace core tube of a sintering apparatus; and a sintering step in which a mixture of halogen-containing gas and inert gas is flowing into the furnace core tube and the porous base material for optical fiber is made into transparent glass by heating the porous base material for optical fiber while moving the heater relative to the porous base material for optical fiber from one end of the core rod to the other end, to obtain glass base material for optical fiber, are performed.

公开(公告)号：US11802070B2

公开(公告)日：2023-10-31

申请号：US17308409

申请日：2021-05-05

Applicant: CORNING INCORPORATED

Inventor： Steven Bruce Dawes ,  Pushkar Tandon

IPC: C03B37/027 ,  C03B37/025 ,  C03B37/029

CPC classification number: C03B37/02718 ,  C03B37/029 ,  C03B37/0253 ,  C03B2201/20

Abstract: A method of processing an optical fiber includes drawing the optical fiber from an optical fiber preform within a draw furnace, the optical fiber extending from the draw furnace along a process pathway, the optical fiber comprising at least one halogen-doped core; and drawing the optical fiber through at least one slow cooling device positioned downstream from the draw furnace at a draw speed. The at least one slow cooling device exposes the optical fiber to a slow cooling device process temperature greater than or equal to 800° C. and less than or equal to 1600° C. The draw speed is such that the optical fiber has a residence time of at least 0.1 s in the at least one slow cooling device. An optical fiber made by such a process is also disclosed.

公开(公告)号：US11667558B2

公开(公告)日：2023-06-06

申请号：US16740903

申请日：2020-01-13

Applicant: CORNING INCORPORATED

Inventor： Laura Beth Cook ,  Curtis Robert Fekety ,  Yunfeng Gu ,  Dale Robert Powers ,  Christopher Scott Thomas ,  Srinivas Vemury ,  Fei Xia ,  Chunfeng Zhou

IPC: C03B19/14 ,  C03B37/018 ,  C03B37/014 ,  C03C13/04 ,  C03C3/06 ,  C03B37/012

CPC classification number: C03B37/01815 ,  C03B19/1407 ,  C03B19/1423 ,  C03B37/0142 ,  C03B37/01282 ,  C03B37/01406 ,  C03C3/06 ,  C03C13/045 ,  C03B2201/12 ,  C03B2201/20 ,  C03B2201/28 ,  C03B2201/30 ,  C03B2207/20 ,  C03B2207/36 ,  C03B2207/50 ,  C03C2203/40

Abstract: A method of producing bi-modal particles includes the steps of igniting a first precursor gas using a primary burner thereby producing a first plurality of particles of a first size, fluidly transporting the first plurality of particles down a particle tube, igniting a second precursor gas using a secondary burner thereby producing a second plurality of particles of a second size, flowing the second plurality of particles into the first plurality of particles, and capturing the first and second plurality of particles.