Patents by Inventor James W. Fleming
James W. Fleming has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9709732Abstract: Described is a technique for the design and manufacture of MMFs. Designs are implemented so as to limit the maximum variation in z(r, ?) with respect to wavelength, where z(r, ?) is the dielectric constant weighted by the square of the wavelength. MMFs for use in CWDM applications are specifically described.Type: GrantFiled: January 30, 2015Date of Patent: July 18, 2017Assignee: OFS FITEL, LLCInventors: Kasyapa Balemarthy, James W Fleming, Jinkee Kim, Robert L Lingle, Jr., Roman Shubochkin, Durgesh Vaidya, Man F Yan
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Publication number: 20160370540Abstract: Described is a technique for the design and manufacture of MMFs. Designs are implemented so as to limit the maximum variation in z(r, ?) with respect to wavelength, where z(r, ?) is the dielectric constant weighted by the square of the wavelength. MMFs for use in CWDM applications are specifically described.Type: ApplicationFiled: January 30, 2015Publication date: December 22, 2016Applicant: OFS Fitel, LLCInventors: Kasyapa Balemarthy, James W Fleming, Jinkee Kim, Robert L Lingle, Jr., Roman Shubochkin, Durgesh Vaidya, Man F Yan
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Publication number: 20160023939Abstract: A chemical vapor deposition (CVD) system is configured to reduce the presence of geometrical and optical taper at the end sections of the preform, or more generally controlling the axial profile of the fabricated optical fiber preform. The system is configured to create an isothermal plasma within the substrate tube, with a relatively confined deposition zone located upstream of the plasma. A reagent delivery system is configured to adjust the composition and concentration of the introduced species in sync with the movement of the plasma and deposition zone within the substrate tube. By synchronizing the movement of the plasma with the adjustable reagent delivery system, it is possible to provide precision control of the axial profile of the created optical fiber preform.Type: ApplicationFiled: July 24, 2014Publication date: January 28, 2016Inventors: John C. Alonzo, David D. Braganza, Merrill H. Brodeur, James W. Fleming
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Patent number: 9158066Abstract: An optical fiber includes a core region having a longitudinal axis. A cladding region surrounds the core region. The core region and cladding region are configured to support and guide the propagation of signal light in a fundamental transverse mode in the core region in the directions of the axis. The fiber has a bend-induced gradient of its equivalent index of refraction indicative of a loss in guidance of the mode. At least a portion of cladding region has a graded index of refraction opposite the bend-induced gradient. The cladding region is configured to have a substantially flat equivalent index in response to a bend of the optical fiber.Type: GrantFiled: December 14, 2012Date of Patent: October 13, 2015Assignee: OFS FITEL, LLCInventors: John M Fini, James W Fleming, Jeffrey W Nicholson, Thierry F Taunay, Man Yan
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Patent number: 9002162Abstract: The specification describes multimode optical fibers produced by improved methods that reduce the manufacturing cost. These methods may also be more efficient in terms of power loss. In one of the embodiments, the improved design has a large core of pure silica derived from a rod-in-tube method. In the embodiment, a down-doped cladding is produced by depositing fluorine-doped silica on the inside of a silica starting tube using isothermal radio frequency plasma deposition. The silica core is inserted and the starting tube collapsed. The silica starting tube is removed and optical fiber is drawn from the fluorine-doped glass coated silica rod.Type: GrantFiled: March 15, 2013Date of Patent: April 7, 2015Assignee: OFS Fitel, LLCInventors: John C Alonzo, David D Braganza, Merrill H Brodeur, James W Fleming
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Publication number: 20140334788Abstract: An optical fiber includes a core region having a longitudinal axis. A cladding region surrounds the core region. The core region and cladding region are configured to support and guide the propagation of signal light in a fundamental transverse mode in the core region in the directions of the axis. The fiber has a bend-induced gradient of its equivalent index of refraction indicative of a loss in guidance of the mode. At least a portion of cladding region has a graded index of refraction opposite the bend-induced gradient. The cladding region is configured to have a substantially flat equivalent index in response to a bend of the optical fiber.Type: ApplicationFiled: December 14, 2012Publication date: November 13, 2014Applicant: OFS FITEL, LLCInventors: John M. Fini, James W. Fleming, Jeffrey W. Nicholson, Thierry F. Taunay, Man Yan
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Publication number: 20140270665Abstract: The specification describes multimode optical fibers produced by improved methods that reduce the manufacturing cost. These methods may also be more efficient in terms of power loss. In one of the embodiments, the improved design has a large core of pure silica derived from a rod-in-tube method. In the embodiment, a down-doped cladding is produced by depositing fluorine-doped silica on the inside of a silica starting tube using isothermal radio frequency plasma deposition. The silica core is inserted and the starting tube collapsed. The silica starting tube is removed and optical fiber is drawn from the fluorine-doped glass coated silica rod.Type: ApplicationFiled: March 15, 2013Publication date: September 18, 2014Applicant: OFS Fitel, LLCInventors: John C. Alonzo, David D. Braganza, Merrill H. Brodeur, James W. Fleming
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Publication number: 20120285202Abstract: An isothermal, low pressure-based process of depositing material within a substrate has been developed, and is particularly useful in forming an optical fiber preform results in creating an extremely narrow reaction zone within which a more uniform and efficient deposition will occur. Sets of isothermal plasma operating conditions have been found that create a narrow deposition zone, assuring that the deposited material is clear glass rather than soot particles. The exhaust end of the tube is connected to a vacuum system which is in turn connected to a scrubber apparatus for removal and neutralization of reaction by-products. The operating conditions are selected such that the hot plasma does not transfer a substantial amount of heat to the substrate tube, where the presence of such heat has been found to result in vaporizing the reactant material (creating soot) and developing hot spots.Type: ApplicationFiled: July 26, 2012Publication date: November 15, 2012Inventors: James W. Fleming, George J. Zydzik
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Patent number: 8252387Abstract: An isothermal, low pressure-based process of depositing material within a substrate has been developed, and is particularly useful in forming an optical fiber preform results in creating an extremely narrow reaction zone within which a more uniform and efficient deposition will occur. Sets of isothermal plasma operating conditions have been found that create a narrow deposition zone, assuring that the deposited material is clear glass rather than soot particles. The exhaust end of the tube is connected to a vacuum system which is in turn connected to a scrubber apparatus for removal and neutralization of reaction by-products. The operating conditions are selected such that the hot plasma does not transfer a substantial amount of heat to the substrate tube, where the presence of such heat has been found to result in vaporizing the reactant material (creating soot) and developing hot spots.Type: GrantFiled: December 10, 2007Date of Patent: August 28, 2012Assignee: OFS Fitel, LLCInventors: James W. Fleming, George J. Zydzik
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Patent number: 7946134Abstract: The specification describes methods for the manufacture of very large optical fiber preforms wherein the core material is produced by MCVD. Previous limitations on preform size inherent in having the MCVD starting tube as part of the preform process are eliminated by removing the MCVD starting tube material from the collapsed MCVD rod by etching or mechanical grinding. Doped overcladding tubes are used to provide the outer segments of the refractive index profile thus making most effective use of the MCVD produced glass and allowing the production of significantly larger MCVD preforms than previously possible.Type: GrantFiled: April 27, 2010Date of Patent: May 24, 2011Assignee: OFS Fitel, LLCInventors: Robert M. Atkins, James W. Fleming, Paul F Glodis, Man F. Yan
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Publication number: 20110052128Abstract: An optical fiber preform comprising a plurality of longitudinal air holes is subjected to a thermal treatment (i.e., heating), coupled with the application of a compressive force on either end of the heated preform to compress the entire preform structure a predetermined amount. The thermal compression treatment has been found to smooth any roughened glass surfaces and heal microcracks that may have formed during the preform fabrication process, essentially “knitting” the glass material back together and forming a preform of improved quality over the prior art microstructured preforms.Type: ApplicationFiled: October 20, 2010Publication date: March 3, 2011Applicant: OFS FITEL LLCInventors: Ryan Bise, James W. Fleming, George J. Zydzik
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Patent number: 7854143Abstract: An optical fiber preform comprising a plurality of longitudinal air holes is subjected to a thermal treatment (i.e., heating), coupled with the application of a compressive force on either end of the heated preform to compress the entire preform structure a predetermined amount. The thermal compression treatment has been found to smooth any roughened glass surfaces and heal microcracks that may have formed during the preform fabrication process, essentially “knitting” the glass material back together and forming a preform of improved quality over the prior art microstructured preforms.Type: GrantFiled: December 22, 2006Date of Patent: December 21, 2010Assignee: OFS Fitel LLCInventors: Ryan Bise, James W. Fleming, George J. Zydzik
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Publication number: 20100287993Abstract: The specification describes methods for the manufacture of very large optical fiber preforms wherein the core material is produced by MCVD. Previous limitations on preform size inherent in having the MCVD starting tube as part of the preform process are eliminated by removing the MCVD starting tube material from the collapsed MCVD rod by etching or mechanical grinding. Doped overcladding tubes are used to provide the outer segments of the refractive index profile thus making most effective use of the MCVD produced glass and allowing the production of significantly larger MCVD preforms than previously possible.Type: ApplicationFiled: April 27, 2010Publication date: November 18, 2010Inventors: Robert M. Atkins, James W. Fleming, Paul F. Glodis, Man F. Yan
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Publication number: 20090148613Abstract: An isothermal, low pressure-based process of depositing material within a substrate has been developed, and is particularly useful in forming an optical fiber preform results in creating an extremely narrow reaction zone within which a more uniform and efficient deposition will occur. Sets of isothermal plasma operating conditions have been found that create a narrow deposition zone, assuring that the deposited material is clear glass rather than soot particles. The exhaust end of the tube is connected to a vacuum system which is in turn connected to a scrubber apparatus for removal and neutralization of reaction by-products. The operating conditions are selected such that the hot plasma does not transfer a substantial amount of heat to the substrate tube, where the presence of such heat has been found to result in vaporizing the reactant material (creating soot) and developing hot spots.Type: ApplicationFiled: December 10, 2007Publication date: June 11, 2009Inventors: James W. Fleming, George J. Zydzik
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Publication number: 20080148777Abstract: An optical fiber preform comprising a plurality of longitudinal air holes is subjected to a thermal treatment (i.e., heating), coupled with the application of a compressive force on either end of the heated preform to compress the entire preform structure a predetermined amount. The thermal compression treatment has been found to smooth any roughened glass surfaces and heal microcracks that may have formed during the preform fabrication process, essentially “knitting” the glass material back together and forming a preform of improved quality over the prior art microstructured preforms.Type: ApplicationFiled: December 22, 2006Publication date: June 26, 2008Inventors: Ryan Bise, James W. Fleming, George J. Zydzik
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Publication number: 20080099588Abstract: An underbody car wash sprayer for home-use, which can be hooked up solely to a garden hose or in combination with a pressure washer. The device utilizes a three nozzled “I” design, supported by four swiveling casters. In addition, it is connected to an ergonomically effective wand system to allow easy maneuverability under the vehicle. Finally, in some embodiments a trigger spray gun acts as a handle and pressure regulator. The compactness of the specific design allows for significant material reduction and hence a reduction in production costs, providing the consumer with a more economical choice. Additionally, the concentrated pressure and spray pattern of the “I” design along with its precision maneuverability allows the consumer to easily access and forcefully remove sediment adhesions to the vehicle underbody while controlling water flow at all times with a trigger spray gun.Type: ApplicationFiled: April 19, 2007Publication date: May 1, 2008Inventors: Mark J. Zinski, Dale R. Rosson, James W. Fleming, Aaron B. Arbiture, Dan Herried
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Patent number: 7208051Abstract: An underbody car wash sprayer for home-use, which can be hooked up solely to a garden hose or in combination with a pressure washer. The device utilizes a three nozzled “I” design, supported by four swiveling casters. In addition, it is connected to an ergonomically effective wand system to allow easy maneuverability under the vehicle. Finally, in some embodiments a trigger spray gun acts as a handle and pressure regulator. The compactness of the specific design allows for significant material reduction and hence a reduction in production costs, providing the consumer with a more economical choice. Additionally, the concentrated pressure and spray pattern of the “I” design along with its precision maneuverability allows the consumer to easily access and forcefully remove sediment adhesions to the vehicle underbody while controlling water flow at all times with a trigger spray gun.Type: GrantFiled: March 18, 2004Date of Patent: April 24, 2007Assignee: ZMZ Imports, LLCInventors: Mark J. Zinski, Dale R. Rosson, James W. Fleming, Aaron B. Arbiture, Dan Herried
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Publication number: 20040159124Abstract: The specification describes methods for the manufacture of very large optical fiber preforms wherein the core material is produced by MCVD. Previous limitations on preform size inherent in having the MCVD starting tube as part of the preform process are eliminated by removing the MCVD starting tube material from the collapsed MCVD rod by etching or mechanical grinding. Doped overcladding tubes are used to provide the outer segments of the refractive index profile thus making most effective use of the MCVD produced glass and allowing the production of significantly larger MCVD preforms than previously possible.Type: ApplicationFiled: February 14, 2003Publication date: August 19, 2004Inventors: Robert M. Atkins, James W. Fleming, Paul F. Glodis, Man F. Yan
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Publication number: 20040099013Abstract: An apparatus and method for fabricating an optical fiber, an optical fiber preform, and an optical fiber core rod are disclosed herein. In particular, the process of fabricating an optical fiber preform involves, during a modified chemical vapor deposition process, collapsing the substrate tube into an optical fiber preform, and compressing the optical fiber preform in the longitudinal direction. An optical fiber preform that is shorter, but larger in diameter is thus formed. The optical fiber preforms therefore can be stacked during the optical fiber fabrication process, which is useful in drawing longer optical fibers with comparable outer diameter and core diameter to that used as the industry standard.Type: ApplicationFiled: November 25, 2002Publication date: May 27, 2004Applicant: Fitel USA Corp.Inventors: James W. Fleming, Srinivas Vemury
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Patent number: 5850497Abstract: A refractory body having reduced optical attenuation, and a method for making same, is disclosed. A refractory body is exposed to a high-temperature oxygen-containing plasma. A drawing force is applied to the body, elongating the body to form a rod of reduced diameter. The source of the plasma is moved in a direction opposite to the applied drawing force, and, preferably, has a reciprocating component of motion to spread the zone of heating. The method is particularly useful in manufacturing optical fiber core rods having low optical attenuation.Type: GrantFiled: April 15, 1997Date of Patent: December 15, 1998Assignee: Lucent Technologies Inc.Inventors: James W. Fleming, Michael L. Pearsall