Patents by Inventor Dennis J Trevor
Dennis J Trevor 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: 10259742Abstract: 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?1, 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.Type: GrantFiled: February 2, 2018Date of Patent: April 16, 2019Assignee: OFS FITEL, LLCInventors: Man F. Yan, Peter I. Borel, Tommy Geisler, Rasmus V. S. Jensen, Ole A. Levring, Jorgen Ostgaard Olsen, David W. Peckham, Dennis J. Trevor, Patrick W. Wisk, Benyuan Zhu
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Patent number: 10197728Abstract: The core region of an optical fiber is doped with chlorine in a concentration that allows for the viscosity of the core region to be lowered, approaching the viscosity of the surrounding cladding. An annular interface region is disposed between the core and cladding and contains a concentration of fluorine dopant sufficient to match the viscosity of the core. By including this annular stress accommodation region, the cladding layer can be formed to include the relatively high concentration of fluorine required to provide the desired degree of optical signal confinement (i.e., forming a “low loss” optical fiber). The inclusion of the annular stress accommodation region allows for the formation of a large effective area optical fiber that exhibits low loss (i.e., <0.19 dB/km) in both the C-band and L-band transmission ranges.Type: GrantFiled: November 12, 2015Date of Patent: February 5, 2019Assignee: OFS FITEL, LLCInventors: Peter I Borel, Rasmus V. S. Jensen, Ole A Levring, Jorgen Ostgaard Olsen, David W Peckham, Dennis J Trevor, Patrick W Wisk, Man F Yan
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Publication number: 20180251397Abstract: 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?1, 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.Type: ApplicationFiled: February 2, 2018Publication date: September 6, 2018Applicant: OFS Fitel, LLCInventors: Man F. Yan, Peter I. Borel, Tommy Geisler, Rasmus V.S Jensen, Ole A. Levring, Jorgen Ostgaard Olsen, David W. Peckham, Dennis J. Trevor, Patrick W. Wisk, Benyuan Zhu
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Patent number: 9919955Abstract: 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?1, 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.Type: GrantFiled: March 31, 2016Date of Patent: March 20, 2018Assignee: OFS FITEL, LLCInventors: 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
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Patent number: 9658395Abstract: The core region of an optical fiber is doped with chlorine in a concentration that allows for the viscosity of the core region to be lowered, approaching the viscosity of the surrounding cladding. An annular interface region is disposed between the core and cladding and contains a concentration of fluorine dopant sufficient to match the viscosity of the core. By including this annular stress accommodation region, the cladding layer can be formed to include the relatively high concentration of fluorine required to provide the desired degree of optical signal confinement (i.e., forming a “low loss” optical fiber).Type: GrantFiled: August 13, 2015Date of Patent: May 23, 2017Assignee: OFS FITEL, LLCInventors: Peter I Borel, Rasmus V. S. Jensen, Ole A Levring, Jorgen Ostgaard Olsen, David W Peckham, Dennis J Trevor, Patrick W Wisk, Man F Yan
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Publication number: 20170022094Abstract: 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.Type: ApplicationFiled: March 31, 2016Publication date: January 26, 2017Applicant: OFS Fitel, LLCInventors: 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
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Patent number: 9487428Abstract: The embodiments disclosed herein seek to ameliorate high costs associated with the use of ultra-pure silica by using a lower-cost starting material and purifying the lower-cost starting material to an acceptable level of purity during the preform manufacturing process. In one embodiment, a nucleating compound is coated on a thin-walled silica tube, which upon cooling, forms cristobalite allowing for easy removal of the thin-walled silica tube.Type: GrantFiled: March 6, 2015Date of Patent: November 8, 2016Assignee: OFS FITEL, LLCInventor: Dennis J Trevor
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Publication number: 20160257600Abstract: Irregular-shaped optical fiber preforms and processes for manufacturing such preforms are disclosed. In some embodiments, the irregular-shaped preforms are manufactured by using thin-walled tubes that have irregularities. For some embodiments, these irregularities are varying wall thicknesses. For other embodiments, these irregularities are non-circular cross-sectional shapes. Yet for other embodiments, these irregularities are combinations of varying wall thicknesses and non-circular cross-sectional shapes.Type: ApplicationFiled: March 6, 2015Publication date: September 8, 2016Applicant: OFS Fitel, LLCInventor: Dennis J. Trevor
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Publication number: 20160257599Abstract: The embodiments disclosed herein seek to ameliorate high costs associated with the use of ultra-pure silica by using a lower-cost starting material and purifying the lower-cost starting material to an acceptable level of purity during the preform manufacturing process. In one embodiment, a nucleating compound is coated on a thin-walled silica tube, which upon cooling, forms cristobalite allowing for easy removal of the thin-walled silica tube.Type: ApplicationFiled: March 6, 2015Publication date: September 8, 2016Applicant: OFS FITEL, LLCInventor: Dennis J. Trevor
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Publication number: 20160257601Abstract: The need for thin-walled tubes or binders is eliminated in powder-in-tube preform manufacturing processes. This is done by using high-surface-area silica particles that consolidate at temperatures that are lower than a high-temperature mold.Type: ApplicationFiled: March 31, 2016Publication date: September 8, 2016Applicant: OFS Fitel, LLCInventor: Dennis J Trevor
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Publication number: 20160257602Abstract: The embodiments disclosed herein seek to ameliorate the high costs associated with the use of ultra-pure silica by using a lower-cost starting material and purifying the lower-cost starting material to an acceptable level of purity during the preform manufacturing process. In one embodiment, instead of using fully densified silica crystals, the disclosed process uses porous silica grains that have a substantially monodisperse size distribution as the starting materials for a powder-in-tube preform manufacturing process and utilize silicon tetrafloride doping to promote silica dehydration.Type: ApplicationFiled: March 6, 2015Publication date: September 8, 2016Applicant: OFS FITEL, LLCInventor: Dennis J. Trevor
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Publication number: 20160257572Abstract: The embodiments disclosed herein seek to ameliorate the high costs associated with the use of ultra-pure silica by using a lower-cost starting material and purifying the lower-cost starting material to an acceptable level of purity during the preform manufacturing process. In one embodiment, instead of using fully densified silica particulate, the disclosed process uses mesoporous silica grains that have a substantially monodisperse size distribution as the starting materials for a powder-in-tube preform manufacturing process.Type: ApplicationFiled: March 6, 2015Publication date: September 8, 2016Applicant: OFS Fitel, LLCInventor: Dennis J Trevor
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Publication number: 20160170137Abstract: The core region of an optical fiber is doped with chlorine in a concentration that allows for the viscosity of the core region to be lowered, approaching the viscosity of the surrounding cladding. An annular interface region is disposed between the core and cladding and contains a concentration of fluorine dopant sufficient to match the viscosity of the core. By including this annular stress accommodation region, the cladding layer can be formed to include the relatively high concentration of fluorine required to provide the desired degree of optical signal confinement (i.e., forming a “low loss” optical fiber). The inclusion of the annular stress accommodation region allows for the formation of a large effective area optical fiber that exhibits low loss (i.e., <0.19 dB/km) in both the C-band and L-band transmission ranges.Type: ApplicationFiled: November 12, 2015Publication date: June 16, 2016Inventors: Peter I. Borel, Rasmus V.S. Jensen, Ole A. Levring, Jorgen Ostgaard Olsen, David W. Peckham, Dennis J. Trevor, Patrick W. Wisk, Man F. Yan
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Patent number: 9322988Abstract: High aspect ratio core optical fiber designs, which could be semi-guiding, including a core region having a first refractive index and a high aspect ratio elongated cross-section along a slow axis direction, are described. An internal cladding having a second refractive index sandwiches the core and acts as a fast-axis signal cladding. The core has an edge region at both of its short edges that is in contract with edge-cladding regions having a barbell shape. The refractive index of the core regions, the refractive index of the internal claddings, and the refractive index of the edge-cladding regions, are selected so as to maximize the optical power of a lowest-order mode propagating in the fiber core, and to minimize the optical power of the next-order modes in the fiber core. A process to fabricate such a high aspect ratio core fiber is also provided.Type: GrantFiled: May 13, 2013Date of Patent: April 26, 2016Assignee: OFS FITEL, LLCInventors: David J Digiovanni, Dennis J Trevor, David A Rockwell, Vladimir V Shkunov
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Publication number: 20160109651Abstract: The core region of an optical fiber is doped with chlorine in a concentration that allows for the viscosity of the core region to be lowered, approaching the viscosity of the surrounding cladding. An annular interface region is disposed between the core and cladding and contains a concentration of fluorine dopant sufficient to match the viscosity of the core. By including this annular stress accommodation region, the cladding layer can be formed to include the relatively high concentration of fluorine required to provide the desired degree of optical signal confinement (Le., forming a “low loss” optical fiber).Type: ApplicationFiled: August 13, 2015Publication date: April 21, 2016Inventors: Peter I. Borel, Rasmus V.S. Jensen, Ole A. Levring, Jorgen Ostgaard Olsen, David W. Peckham, Dennis J. Trevor, Patrick W. Wisk, Man F. Yan
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Publication number: 20150110452Abstract: High aspect ratio core optical fiber designs, which could be semi-guiding, including a core region having a first refractive index and a high aspect ratio elongated cross-section along a slow axis direction, are described. An internal cladding having a second refractive index sandwiches the core and acts as a fast-axis signal cladding. The core has an edge region at both of its short edges that is in contract with edge-cladding regions having a barbell shape. The refractive index of the core regions, the refractive index of the internal claddings, and the refractive index of the edge-cladding regions, are selected so as to maximize the optical power of a lowest-order mode propagating in the fiber core, and to minimize the optical power of the next-order modes in the fiber core. A process to fabricate such a high aspect ratio core fiber is also provided.Type: ApplicationFiled: May 13, 2013Publication date: April 23, 2015Inventors: David J. Digiovanni, Dennis J. Trevor, David A. Rockwell, Vladimir Shkunov
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Patent number: 6732549Abstract: A process produces a glass overcladding tube from a silica gel body. The process includes passing the gel body through a hot zone under conditions that cause partial sintering of the gel body and repassing the gel body through the hot zone under conditions that further sinter the gel body into a glass overcladding tube.Type: GrantFiled: November 8, 2000Date of Patent: May 11, 2004Assignee: Lucent Technologies Inc.Inventors: Richard M Lum, David A Mixon, Eric M Monberg, Dennis J Trevor
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Publication number: 20040071421Abstract: A process produces a glass overcladding tube from a silica gel body. The process includes passing the gel body through a hot zone under conditions that cause partial sintering of the gel body and repassing the gel body through the hot zone under conditions that further sinter the gel body into a glass overcladding tube.Type: ApplicationFiled: October 7, 2003Publication date: April 15, 2004Inventors: Richard M. Lum, David A. Mixon, Eric M. Monberg, Dennis J. Trevor
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Patent number: 6467312Abstract: The disclosed method of making microstructured optical fiber comprises providing a mold, with a multiplicity of elongate elements extending into the mold and being maintained in a predetermined spatial arrangement with respect to the mold. Silica-containing sol is introduced into the mold and is caused to or permitted to gel, such that a gel body results. After removing the elongate elements from the gel body and removing the gel body from the mold, the gel body is dried, sintered and purified, and the microstructured fiber is drawn from the sintered body.Type: GrantFiled: July 11, 2000Date of Patent: October 22, 2002Assignee: Fitel USA Corp.Inventors: Yoram De Hazan, John Burnette MacChesney, Thomas Edward Stockert, Dennis J Trevor, Robert Scott Windeler
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Patent number: 6091500Abstract: A method and apparatus for measuring and determining certain parameters of an overclad tube measures the OD and the wall thickness of the tube at a plurality of longitudinal points and a plurality of angles at each point or longitudinal position. A laser device measures the OD and an ultrasonic transducer measures the wall thickness. The inside diameter of the tube at each point is determined by subtracting the wall thickness from the measured outside diameter. From the data then obtained, the straight through internal clearance of the tube is calculated by determining a plurality of bow vectors which represent the deviations of the tube inner diameter from a least squares fit.Type: GrantFiled: December 16, 1998Date of Patent: July 18, 2000Assignee: Lucent Technologies Inc.Inventors: Charles Chester Bahr, Dennis J. Trevor, Paula L. Trevor