Harry D Garner

US Patent:

6859596, Feb 22, 2005

Filed:

Jul 23, 2002

Appl. No.:

10/202540

Inventors:

Harry Douglas Garner - Lawrenceville GA, US
Zhi Zhou - Lawrenceville GA, US
Jinkee Kim - Norcross GA, US
Alan H. McCurdy - Duluth GA, US

Assignee:

Fitel USA Corp. - Norcross GA

International Classification:

G02B006/02

US Classification:

385123, 385124, 65402, 65438, 65504

Abstract:

A system and method is disclosed for manufacturing single mode optical fiber which incorporates a spin in the molten fiber during manufacturing. The introduction of spin minimizes a form of distortion called polarization mode dispersion (PMD) and varying the spin, i. e. changing its characteristics, is known to further reduce PMD. However, introducing spin on a molten fiber may result in also introducing twist on the fiber. Twist is a non-permanent rotational force on the cooled fiber which causes stress and is to be avoided. A spin function is disclosed that not only contains a high degree of variability for reducing PMD, but also ensures that mechanical twist on the fiber is minimized, thus reducing stress on the fiber. The spin function modulates either the amplitude, frequency, or both, at the beginning of a cycle to minimize twist on the fiber.

US Patent:

6927849, Aug 9, 2005

Filed:

Oct 23, 2002

Appl. No.:

10/278372

Inventors:

Ronald L. Adams - Buford GA, US
Harry D. Garner - Lawrenceville GA, US
Robert Thornton - Cumming GA, US

Assignee:

Furukawa Electric North America, Inc. - Atlanta GA

International Classification:

G01N021/88

US Classification:

3562392, 356 731

Abstract:

A monitoring system for detection of defects in an optical fiber coating during production of the fiber has first and second beam generating means which produce planar coherent beams which cross each other at the fiber passing through the system creating one or more diffraction patterns. A first plurality of photodetectors are mounted in a mount, the front face of which is impinged by the planar diffraction pattern, and a second plurality of photodetectors is similarly mounted in position below the impinging pattern. A defect in the fiber coating, regardless of shape or orientation, will cause the pattern or patterns to be tilted or shifted upward, downward, or planarly tilted to impinge one or more of the photodiodes which, as a result, generates a signal which is applied to a comparator and control circuit.

US Patent:

6937325, Aug 30, 2005

Filed:

Jan 30, 2003

Appl. No.:

10/354277

Inventors:

Andrew Ingles, Jr. - Alpharetta GA, US
Albert Ritger - Lawrenceville GA, US
Zhi Zhou - Lawrenceville GA, US
Harry D. Garner - Lawrenceville GA, US

Assignee:

Fitel U.S.A. Corporation - Norcross GA

International Classification:

G01N021/00

US Classification:

356 731

Abstract:

A method and an apparatus for obtaining measurements of eccentricity in optical fibers, from which the spin imparted to the optical fiber can be ascertained. The method and apparatus enable eccentricity to be measured in such a way that this measurement can be utilized to determine the amount of spin imparted to an optical fiber as the optical fiber was being drawn, although the eccentricity measurement may be used for purposes other than to determine the amount of spin in the fiber. By viewing the fiber from one or more positions along the length of the fiber, the eccentricity of the fiber as a function of position along the length of the fiber can be determined. The amount of spin in the fiber can then be determined from the eccentricity measurement.

US Patent:

8351749, Jan 8, 2013

Filed:

Dec 17, 2009

Appl. No.:

12/640224

Inventors:

Kariofilis Konstadinidis - Decatur GA, US
Harry Garner - Lawrenceville GA, US

Assignee:

OFS Fitel, LLC - Norcross GA

International Classification:

G02B 6/02

US Classification:

385128, 385123, 385126, 385127

Abstract:

Certain embodiments of the invention may include systems and methods for coating an optical fiber. The method includes coating an optical fiber with a primary coating, preparing a secondary coating by selectively mixing a concentrate with an ultraviolet (UV) curable diluent coating, wherein the concentrate comprises predetermined amounts of a color agent and a release agent, and applying the secondary coating to the optical fiber and primary coating.

US Patent:

8637115, Jan 28, 2014

Filed:

Dec 24, 2009

Appl. No.:

12/647053

Inventors:

Peter Haslov - Solrod Strand, DK
Kariofilis Konstadinidis - Decatur GA, US
Harry Garner - Lawrenceville GA, US

Assignee:

OFS Fitel, LLC - Norcross GA

International Classification:

B05D 5/06
C08F 2/46
B05D 3/02
B05B 5/00

US Classification:

427162, 427487, 4273722, 118642

Abstract:

Certain embodiments of the invention may include systems and methods curing a coated optical fiber. The method includes drawing the coated optical fiber through a gas chamber filled with a predetermined gas, drawing the fiber through a cure tube coupled to the gas chamber, and purging at least a portion of an inner surface of the cure tube with a purge gas as the coated optical fiber is drawn through the cure tube.

US Patent:

20040017557, Jan 29, 2004

Filed:

Jul 23, 2002

Appl. No.:

10/202560

Inventors:

Haiying Huang - Atlanta GA, US
Zhi Zhou - Lawrenceville GA, US
Harry Garner - Lawrenceville GA, US

Assignee:

Fitel USA Corp.

International Classification:

G01N021/00

US Classification:

356/073100

Abstract:

A system and method is disclosed for determining information regarding the result of introducing a rotational force on an optical fiber during manufacturing. A rotational deformation of the molten fiber, called spin, is imparted that becomes permanent upon cooling of the fiber. The rotational force also introduces twist on the cooled fiber, which is a non-permanent, mechanical rotation of the fiber. The system and method uses a diameter measuring device that produces a signal corresponding to the fiber's diameter with respect to time. Since the fiber is slightly elliptical in practice, periodic variations in the diameter measurement signal are detected that reflect the rotation imparted into the fiber. The signal is further processed to provide data regarding the effect of the rotations introduced into the fiber, namely the twist and spin present in the fiber.

US Patent:

20040062514, Apr 1, 2004

Filed:

Sep 26, 2002

Appl. No.:

10/255751

Inventors:

Gene Weeks - Duluth GA, US
Stephen Mast - Norcross GA, US
Zhi Zhou - Lawrenceville GA, US
John Ryan - Duluth GA, US
Harry Garner - Lawrenceville GA, US
Siu-Ping Hong - Alpharetta GA, US
John Popwell - Stone Mountain GA, US
Alan McCurdy - Duluth GA, US

Assignee:

Fitel USA Corp.

International Classification:

G02B006/00

US Classification:

385/147000

Abstract:

Methods and apparatuses negate a measured mechanical twist of an optical fiber by introducing a counteracting twist to bring the net mechanical twist closer to zero, which reduces the fiber's polarization mode dispersion (PMD). A spool of optical fiber having undesirable mechanical twist is mounted and fiber is drawn from the end of the spool to impart a specified counteracting mechanical twist. Additionally, the spool may be controllably rotated by a control system while optical fiber is drawn there from, allowing the system to generate a precise amount of counteracting mechanical twist in the fiber.

US Patent:

20110188822, Aug 4, 2011

Filed:

Feb 4, 2010

Appl. No.:

12/700001

Inventors:

Kariofilis Konstadinidis - Decatur GA, US
Harry Garner - Decatur GA, US
Peter Haslov - Solrod Strand, DK
Jinkee Kim - Norcross GA, US
Debra Simoff - Simsbury CT, US
Durgesh Vaidya - Southbridge MA, US
Yoshihiro Arashitani - Ichihara, JP

Assignee:

OFS FITEL, LLC - Norcross GA

International Classification:

G02B 6/02
B05C 1/04
B05D 5/06

US Classification:

385123, 118642, 4271632

Abstract:

Certain embodiments of the invention may include systems and methods for providing optical fiber coatings to reduce microbend losses. According to an example embodiment of the invention, a method is provided for coating an optical fiber to reduce microbend losses and polarization mode dispersion (PMD). The method includes applying a primary layer to the optical fiber, wherein the optical fiber comprises a core region surrounded by a cladding region. The method includes applying a secondary layer to the primary layer, and curing the primary and secondary layers, wherein the cured primary layer adheres to the cladding region with a minimum pullout adhesion of 6 N/cm, and the cured secondary layer has an in situ modulus of about 700 MPa to about 1200 MPa at room temperature.

Author:

Harry Mason Garner

ISBN #:

0571047025

Author:

Harry Mason Garner

ISBN #:

0571112862