Patents by Inventor Robert L. Lingle
Robert L. Lingle 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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Publication number: 20240134121Abstract: A system of aligning concatenated sections of multicore optical fiber incorporates the capability of intentionally changing core assignments as part of the azimuthal alignment process. The intentional changing of core assignments, referred to as offset clocking, compensates for differences in properties of the individual core regions in a way that reduces variations between the spatial channels supported in the transmission system. The offset clocking technique can be used, e.g., to improve the attenuation (or other selected properties of the propagating signals). The offset clocking technique may be used to step through sequential changes core assignments at one or more splice locations (passive clocking) or identify a particular pairing of cores from one fiber section to the next (e.g., “good quality” core assigned to a “poor quality” signal exiting the first section) and rotate the fiber sections with respect to each other to achieve this particular core assignment.Type: ApplicationFiled: July 10, 2023Publication date: April 25, 2024Applicant: OFS Fitel, LLCInventors: Tristan Kremp, Yue Liang, Robert L Lingle
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Publication number: 20240004136Abstract: A system of aligning concatenated sections of multicore optical fiber incorporates the capability of intentionally changing core assignments as part of the azimuthal alignment process. The intentional changing of core assignments, referred to as offset clocking, compensates for differences in properties of the individual core regions in a way that reduces variations between the spatial channels supported in the transmission system. The offset clocking technique can be used, e.g., to improve the attenuation (or other selected properties of the propagating signals). The offset clocking technique may be used to step through sequential changes core assignments at one or more splice locations (passive clocking) or identify a particular pairing of cores from one fiber section to the next (e.g., “good quality” core assigned to a “poor quality” signal exiting the first section) and rotate the fiber sections with respect to each other to achieve this particular core assignment.Type: ApplicationFiled: December 6, 2021Publication date: January 4, 2024Applicant: OFS Fitel, LLCInventors: Tristan Kremp, Yue Liang, Robert L Lingle
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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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Patent number: 9709731Abstract: A few-mode fiber is described, having a graded-index core and a surrounding cladding comprising a ledge between the core and the trench, a down-doped trench abutting the ledge, and an undoped cladding region abutting the trench. The fiber's refractive index profile is configured to support 9 or more LP modes for transmission of a spatially-multiplexed optical signal. Undesired modes have respective effective indices that are close to, or less than, the cladding index so as to result in leakage of the undesired modes into the outer cladding. The index spacing between the desired mode having the lowest effective index and the leaky mode with the highest effective index is sufficiently large so as to substantially prevent coupling therebetween.Type: GrantFiled: December 18, 2014Date of Patent: July 18, 2017Assignee: OFS FITEL, LLCInventors: Lars Gruner-Nielsen, Robert L. Lingle, David W. Peckham, Yi Sun
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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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Patent number: 9250383Abstract: A few-mode optical fiber comprises a core surrounded by a cladding, having a step index profile that is structured to support propagation of a plurality of desired signal-carrying modes, while suppressing undesired modes. The core and cladding are configured such that the undesired modes have respective effective indices that are close to, or less than, the cladding index such that the undesired modes are leaky modes. The index spacing between the desired mode having the lowest effective index and the leaky mode with the highest effective index is sufficiently large so as to substantially prevent coupling therebetween.Type: GrantFiled: February 24, 2012Date of Patent: February 2, 2016Assignee: OFS FITEL, LLCInventors: Lars Gruner-Nielsen, Robert L. Lingle, Alan McCurdy, David W. Peckham, Torger Tokle
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Patent number: 9116279Abstract: Certain embodiments of the invention may include optimized trench-assisted ultra large area (ULA) optical fibers. According to an example embodiment of the invention, a trench-assisted optical fiber, optimized for microbend frontier (MBF) performance is provided. The optical fiber includes a core region having a longitudinal axis, a shelf region surrounding said core region, a cladding region surrounding said shelf region, said core and shelf and cladding regions configured to support and guide the propagation of signal light in a fundamental transverse mode in said core and shelf regions in the direction of said axis. The optical fiber further includes a core effective area (Aeff) of between 135 ?m2 and about 170 ?m2; a relative effective index difference (Neff) of greater than about 0.08%; a loss at 1550 nm of less than 0.180 dB/km; and a microbend frontier (MBF) distance of less than about 90%.Type: GrantFiled: February 24, 2014Date of Patent: August 25, 2015Inventors: Robert L Lingle, Jr., David W Peckham
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Publication number: 20150168643Abstract: A few-mode fiber is described, having a graded-index core and a surrounding cladding comprising a ledge between the core and the trench, a down-doped trench abutting the ledge, and an undoped cladding region abutting the trench. The fiber's refractive index profile is configured to support 9 or more LP modes for transmission of a spatially-multiplexed optical signal. Undesired modes have respective effective indices that are close to, or less than, the cladding index so as to result in leakage of the undesired modes into the outer cladding. The index spacing between the desired mode having the lowest effective index and the leaky mode with the highest effective index is sufficiently large so as to substantially prevent coupling therebetween.Type: ApplicationFiled: December 18, 2014Publication date: June 18, 2015Inventors: Lars Gruner-Nielsen, Robert L. Lingle, David W. Peckham, Yi Sun
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Patent number: 8948559Abstract: The specification describes modified step index and GRaded INdex (GRIN) fibers with low core relative delta (near 0.8%) which have desirable properties for transmission. These lower delta fibers have lower attenuation losses due to reduced Rayleigh scattering, which is desirable to improve performance in multiple mode multiplexing. The fiber designs include optimized raised triangle profiles, and depressed cladding profiles, to support two and four LP modes.Type: GrantFiled: March 15, 2013Date of Patent: February 3, 2015Assignee: OFS Fitel, LLCInventors: Lars Gruner-Nielsen, Robert L. Lingle, David W Peckham, Yi Sun
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Publication number: 20140169748Abstract: Certain embodiments of the invention may include optimized trench-assisted ultra large area (ULA) optical fibers. According to an example embodiment of the invention, a trench-assisted optical fiber, optimized for microbend frontier (MBF) performance is provided. The optical fiber includes a core region having a longitudinal axis, a shelf region surrounding said core region, a cladding region surrounding said shelf region, said core and shelf and cladding regions configured to support and guide the propagation of signal light in a fundamental transverse mode in said core and shelf regions in the direction of said axis. The optical fiber further includes a core effective area (Aeff) of between 135 ?m2 and about 170 ?m2; a relative effective index difference (Neff) of greater than about 0.08%; a loss at 1550 nm of less than 0.180 dB/km; and a microbend frontier (MBF) distance of less than about 90%.Type: ApplicationFiled: February 24, 2014Publication date: June 19, 2014Inventors: Robert L. Lingle, David W. Peckham
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Publication number: 20140093205Abstract: A few-mode optical fiber comprises a core surrounded by a cladding, having a step index profile that is structured to support propagation of a plurality of desired signal-carrying modes, while suppressing undesired modes. The core and cladding are configured such that the undesired modes have respective effective indices that are close to, or less than, the cladding index such that the undesired modes are leaky modes. The index spacing between the desired mode having the lowest effective index and the leaky mode with the highest effective index is sufficiently large so as to substantially prevent coupling therebetween.Type: ApplicationFiled: February 24, 2012Publication date: April 3, 2014Applicant: OFS FITEL, LLCInventors: Lars Gruner-Nielsen, Robert L. Lingle, Alan McCurdy, David W. Peckham, Torger Tokle
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Patent number: 8682127Abstract: Described is a modular method of making an optical fiber comprising a core and a cladding configured to support and guide a fundamental transverse mode, the cladding including (i) an outer cladding having an index nout less than the index n1 of the core, (ii) an inner cladding having an index n2<nout, (iii) a pedestal having an index n4?nout, (iv) an inner trench disposed between the inner cladding and the pedestal, the inner trench having an index n3<<n4, and (iv) an outer trench disposed between the pedestal and the outer cladding, the outer trench having an index n5<n4 and relatively close to nout. To suppress unwanted HOMs the pedestal is configured to resonantly couple at least one unwanted transverse mode of the core (other than the fundamental mode) to at least one transverse mode of the pedestal.Type: GrantFiled: May 14, 2013Date of Patent: March 25, 2014Assignee: OFS Fitel, LLCInventors: John M. Fini, Robert L. Lingle, Jr., Yi Sun
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Publication number: 20140064686Abstract: The specification describes modified step index and GRaded INdex (GRIN) fibers with low core relative delta (near 0.8%) which have desirable properties for transmission. These lower delta fibers have lower attenuation losses due to reduced Rayleigh scattering, which is desirable to improve performance in multiple mode multiplexing. The fiber designs include optimized raised triangle profiles, and depressed cladding profiles, to support two and four LP modes.Type: ApplicationFiled: March 15, 2013Publication date: March 6, 2014Applicant: OFS FITEL, LLCInventors: Gruner-Nielsen Lars, Robert L. Lingle, David W. Peckham, Yi Sun
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Publication number: 20130323414Abstract: Adverse hydrogen aging limitations in multiply-doped optical fibers are overcome by passivating these optical fibers using a deuterium passivation process. This treatment essentially pre-reacts the glass with deuterium so that the most active glass sites are no longer available to react with hydrogen in service. Optical fibers of main interest are doped with mixtures of germanium and phosphorus. Optimum passivating process conditions are described.Type: ApplicationFiled: May 21, 2013Publication date: December 5, 2013Applicant: OFS FITEL, LLCInventors: David John DiGiovanni, Robert L. Lingle, Michael J. LuValle, George E. Oulundsen, Durgesh Vaidya