公开(公告)号：US20140301708A1

公开(公告)日：2014-10-09

申请号：US14211035

申请日：2014-03-14

Applicant: CORNING INCORPORATED

Inventor： SNIGDHARAJ KUMAR MISHRA ,  Pushkar Tandon

IPC: G02B6/02

CPC classification number: G02B6/02 ,  G02B6/02014 ,  G02B6/0281 ,  G02B6/03627

Abstract: An optical fiber having both low bend loss. The fiber has a central core region having refractive index Δ1, an inner cladding region having an outer radius r2>17 microns and refractive index Δ2 and a second cladding region surrounding the inner cladding region having refractive index Δ3. The fiber profile segments may be arranged so that Δ1>Δ3>Δ2. The fiber may exhibit a profile volume, V2 of the inner cladding region, calculated between r1 and r2, is at least 30% Δmicron2.

Abstract translation: 具有低弯曲损耗的光纤。 纤维具有折射率＆Dgr; 1的中心纤芯区域，具有外半径r2> 17微米的内包层区域和折射率＆amp; Dgr 2;以及包围折射率＆Dgr; 3的内包层区域的第二包层区域。 纤维轮廓段可以被布置成使得＆Dgr; 1>＆Dgr; 3>＆Dgr; 2。 纤维可能呈现轮廓体积，在r1和r2之间计算的内包层区域的V2至少为30％＆Dgr; 2微米2。

公开(公告)号：US20250026675A1

公开(公告)日：2025-01-23

申请号：US18769986

申请日：2024-07-11

Applicant: CORNING INCORPORATED

Inventor： Nikolaos Pantelis Kladias ,  Ming-Jun Li ,  Bruce Warren Reding ,  Pushkar Tandon ,  Kevin Lee Wasson

IPC: C03B37/029

Abstract: A method of forming an optical fiber, the method including heating a forming region of the optical fiber preform within a pressure device while exposing the forming region to a total pressure of about 500 atm or greater, directing the optical fiber preform in a downstream direction along a process pathway to form the optical fiber, and traversing the optical fiber through an aperture of a nozzle to maintain the total pressure of about 500 atm or greater within the pressure device.

公开(公告)号：US12006253B2

公开(公告)日：2024-06-11

申请号：US17030605

申请日：2020-09-24

Applicant: CORNING INCORPORATED

Inventor： Dana Craig Bookbinder ,  Stephan Lvovich Logunov ,  Darren Andrew Stainer ,  Pushkar Tandon ,  Ruchi Tandon

IPC: G02B6/00 ,  C03C25/104 ,  C03C25/12 ,  C03C25/6226 ,  G02B6/02

CPC classification number: C03C25/104 ,  C03C25/12 ,  C03C25/6226 ,  G02B6/02395 ,  C03C2217/73

Abstract: An optical fiber curing component includes a first tube comprising a first body defining a first interior surface and a first exterior surface, the first tube defining a first aperture and a second aperture on opposite ends of a first cavity, wherein the first tube defines a central axis extending through the first cavity; light sources coupled to the first body of the first tube and configured to emit light toward the central axis of the first tube, wherein each of the light sources intersect a common plane defined perpendicular to the central axis of the first tube; a silica glass article, having an anti-reflective coating, disposed between each of the plurality of light sources and the central axis of the first tube; and a reflective coating positioned on the interior surface of the first body and configured to reflect the light toward the central axis of the first tube.

公开(公告)号：US20240061167A1

公开(公告)日：2024-02-22

申请号：US18231967

申请日：2023-08-09

Applicant: CORNING INCORPORATED

Inventor： Kevin Wallace Bennett ,  Douglas Llewellyn Butler ,  Pushkar Tandon

IPC: G02B6/02

CPC classification number: G02B6/02042

Abstract: A multicore optical fiber including four cores arranged in a linear configuration, the centerline of each core being spaced from the centerline of an adjacent core by a distance x of about 30 microns or less, and each core having a relative refractive index Δ1. A cladding surrounding each of the four cores, the cladding including an inner cladding region with a relative refractive index Δ2, a depressed-index cladding region with a relative refractive index Δ3, and an outer cladding region with a relative refractive index Δ4, wherein Δ1>Δ2>Δ3 and Δ1>Δ4>Δ3. Furthermore, each core of the four cores has a mode field diameter, at a wavelength of 1310 nm, of about 8.1 microns or less, and cross talk between adjacent cores is about −18 dB or less at wavelengths of 1310 nm and 1550 nm per 2 km fiber length.

公开(公告)号：US11874494B2

公开(公告)日：2024-01-16

申请号：US17184909

申请日：2021-02-25

Applicant: CORNING INCORPORATED

Inventor： Scott Robertson Bickham ,  Sergejs Makovejs ,  Pushkar Tandon ,  Aramais Robert Zakharian

IPC: G02B6/036 ,  G02B6/02

CPC classification number: G02B6/036 ,  G02B6/02009 ,  G02B6/02295

Abstract: An optical fiber is provided that includes a core region and a cladding region. The core region is formed of silica glass doped with chlorine and/or an alkali metal. The cladding region surrounds the core region and includes an inner cladding directly adjacent to the core region, an outer cladding surrounding the inner cladding, and a trench region disposed between the inner cladding and the outer cladding in a radial direction. The trench region has a volume of about 30% Δ-micron2 or greater. Additionally, the optical fiber has an effective area at 1550 nm of about 100 micron2 or less.

公开(公告)号：US11828980B2

公开(公告)日：2023-11-28

申请号：US17190833

申请日：2021-03-03

Applicant: CORNING INCORPORATED

Inventor： Kevin Wallace Bennett ,  Snigdharaj Kumar Mishra ,  Pushkar Tandon ,  Aramais Robert Zakharian

IPC: G02B6/02 ,  C03C25/106 ,  G02B6/028 ,  G02B6/44

CPC classification number: G02B6/02395 ,  C03C25/106 ,  G02B6/0288 ,  G02B6/4403

Abstract: A multicore optical fiber is provided that includes a first core with silica glass doped with chlorine and/or an alkali metal, a first inner cladding surrounding the first core, and a first outer cladding surrounding the first inner cladding and having a first trench region having a volume of about 30%Δ-micron2 or greater. The multicore optical fiber also includes a second core with silica glass doped with chlorine and/or an alkali metal, a second inner cladding surrounding the second core, and a second outer cladding surrounding the second inner cladding and having a second trench region having a volume of about 30%Δ-micron2 or greater. Additionally, a common cladding surrounds the first core and the second core, and the first core and the second core each have an effective area at 1550 nm of about 100 micron2 or less.

公开(公告)号：US20230335966A1

公开(公告)日：2023-10-19

申请号：US18127399

申请日：2023-03-28

Applicant: CORNING INCORPORATED

Inventor： Kevin Wallace Bennett ,  Pushkar Tandon

IPC: H01S3/067

CPC classification number: H01S3/06733 ,  H01S3/06716

Abstract: An amplifying optical fiber includes a common cladding comprising a radius defining a glass portion of the amplifying optical fiber and having a relative refractive index Δ4. At least one waveguide extends through the common cladding The at least one waveguide includes a core region, an inner cladding region encircling and directly contacting the core region, and a depressed cladding region encircling and directly contacting the inner cladding region. The core region includes from greater than or equal to about 500 ppm and less than or equal to about 10,000 ppm Er2O3 and has core maximum relative refractive index Δ1max. The inner cladding region includes an inner cladding relative refractive index Δ2. The depressed cladding region includes a minimum depressed relative refractive index Δ3min such that Δ1max>Δ2>Δ3min and Δ4>Δ3min.

公开(公告)号：US11782207B2

公开(公告)日：2023-10-10

申请号：US17381756

申请日：2021-07-21

Applicant: CORNING INCORPORATED

Inventor： Scott Robertson Bickham ,  Matthew Ryan Drake ,  Shandon Dee Hart ,  Ming-Jun Li ,  Joseph Edward McCarthy ,  Weijun Niu ,  Pushkar Tandon

IPC: G02B6/02

CPC classification number: G02B6/02014 ,  G02B6/02395

Abstract: An optical fiber is provided that includes a core region, a cladding region having a radius less than about 62.5 microns; a polymer coating comprising a high-modulus layer and a low-modulus layer, wherein a thickness of the low-modulus inner coating layer is in a range of 4 microns to 20 microns, the modulus of the low-modulus inner coating layer is less than or equal to about 0.35 MPa, a thickness of the high-modulus coating layer is in a range of 4 microns to 20 microns, the modulus of the high-modulus inner coating layer is greater than or equal to about 1.6 GPa, and wherein a puncture resistance of the optical fiber is greater than 20 g, and wherein a microbend attenuation penalty of the optical fiber is less than 0.03 dB/km, and wherein an outer diameter of the coated optical fiber is less than or equal to 175 microns.

公开(公告)号：US11675122B2

公开(公告)日：2023-06-13

申请号：US17318510

申请日：2021-05-12

Applicant: CORNING INCORPORATED

Inventor： Scott Robertson Bickham ,  Ming-Jun Li ,  Pushkar Tandon ,  Ruchi Sarda Tandon

IPC: G02B6/02 ,  G02B6/036 ,  C03C25/1065 ,  C03C25/50 ,  G02B6/028

CPC classification number: G02B6/02395 ,  G02B6/03627 ,  C03C25/1065 ,  C03C25/50 ,  G02B6/02009 ,  G02B6/0286

Abstract: The present disclosure provides optical fibers with an impact-resistant coating system. The fibers feature low attenuation. The coating system includes a primary coating and a secondary coating. The primary coating and secondary coating have reduced thickness to provide low-diameter fibers without sacrificing protection. The primary coating has high tear strength and is resistant to damage caused by mechanical force. The secondary coating has high puncture resistance. The outer diameter of the optical fiber is less than or equal to 190 μm.

公开(公告)号：US11579355B2

公开(公告)日：2023-02-14

申请号：US17443588

申请日：2021-07-27

Applicant: CORNING INCORPORATED

Inventor： Pushkar Tandon ,  Snigdharaj Kumar Mishra

IPC: G02B6/02 ,  G02B6/028 ,  G02B6/036

Abstract: A multicore optical fiber comprises a common cladding and a plurality of core portions disposed in the common cladding. Each of the core portions includes a central axis, a core region extending from the central axis to a radius r1, the core region comprising a relative refractive index Δ1, an inner cladding region extending from the radius r1 to a radius r2, the inner cladding region comprising a relative refractive index Δ2, and a depressed cladding extending from the radius r2 to a radius r3, the depressed cladding region comprising a relative refractive index Δ3 and a minimum relative refractive index Δ3 min. The relative refractive indexes may satisfy Δ1>Δ2>Δ3 min. The mode field diameter of each core portion may greater than or equal to 8.2 μm and less than or equal to 9.5 μm.