Patents by Inventor Patrick W. Wisk
Patrick W. Wisk 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: 11161767Abstract: An optical preform manufacturing process is disclosed in which an alkali dopant is deposited between an optical fiber core rod and an optical fiber cladding jacket. Depositing the alkali dopant between the core rod and the cladding jacket permits diffusion of the alkali dopants into the core during fiber draw when the core and the cladding are at their respective transition (or vitrification) temperatures. Introduction of the alkali dopants between the core rod and the cladding jacket also permits decoupling of the alkali doping process from one or more of other optical preform manufacturing processes. The optical preform manufacturing process can also include placing alkali dopants between an optical fiber inner cladding jacket and an optical fiber outer cladding jacket to reduce the glass viscosity during fiber draw.Type: GrantFiled: January 7, 2019Date of Patent: November 2, 2021Assignee: OFS FITEL, LLCInventors: David W. Peckham, Patrick W. Wisk, Man F. Yan
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Publication number: 20200024176Abstract: An optical preform manufacturing process is disclosed in which an alkali dopant is deposited between an optical fiber core rod and an optical fiber cladding jacket. Depositing the alkali dopant between the core rod and the cladding jacket permits diffusion of the alkali dopants into the core during fiber draw when the core and the cladding are at their respective transition (or vitrification) temperatures. Introduction of the alkali dopants between the core rod and the cladding jacket also permits decoupling of the alkali doping process from one or more of other optical preform manufacturing processes. The optical preform manufacturing process can also include placing alkali dopants between an optical fiber inner cladding jacket and an optical fiber outer cladding jacket to reduce the glass viscosity during fiber draw.Type: ApplicationFiled: January 7, 2019Publication date: January 23, 2020Applicant: OFS Fitel, LLCInventors: David W. Peckham, Patrick W. Wisk, Man F. Yan
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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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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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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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Patent number: 9231365Abstract: A discrete Raman amplifier comprises a Raman gain fiber, an input port into the Raman gain fiber for receiving optical signals to be Raman amplified, and an output port out of the Raman gain fiber for emitting Raman-amplified optical signals. A pump light input provides pump light to the Raman gain fiber at a plurality of wavelengths so as to provide Raman amplification over the selected signal wavelength range. Within both the pump light wavelength range and the selected signal wavelength range, the Raman gain fiber has only positive chromatic dispersion, and the Raman gain fiber has a moderate effective area.Type: GrantFiled: June 12, 2014Date of Patent: January 5, 2016Assignee: OFS FITEL, LLCInventors: Patrick W Wisk, Man F Yan, Benyuan Zhu
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Publication number: 20150364897Abstract: A discrete Raman amplifier comprises a Raman gain fiber, an input port into the Raman gain fiber for receiving optical signals to be Raman amplified, and an output port out of the Raman gain fiber for emitting Raman-amplified optical signals. A pump light input provides pump light to the Raman gain fiber at a plurality of wavelengths so as to provide Raman amplification over the selected signal wavelength range. Within both the pump light wavelength range and the selected signal wavelength range, the Raman gain fiber has only positive chromatic dispersion, and the Raman gain fiber has a moderate effective area.Type: ApplicationFiled: June 12, 2014Publication date: December 17, 2015Applicant: OFS FITEL, LLCInventors: Patrick W. Wisk, Man F. Yan, Benyuan Zhu
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Patent number: 8428409Abstract: An optical waveguide has a refractive index variation that is structured to provide the fiber, over a wavelength operating range, with an effective area supporting multiple Stokes shifts and with a negative dispersion value at a target wavelength within the wavelength operating range. The refractive index variation is further structured to provide the fiber with a finite LP01 cutoff at a wavelength longer than the target wavelength, whereby the LP01 cutoff wavelength provides a disparity, for a selected bending diameter, between macrobending losses at the target wavelength and macrobending losses at wavelengths longer than the target wavelength, whereby Raman scattering is frustrated at wavelengths longer than the target wavelength.Type: GrantFiled: May 11, 2010Date of Patent: April 23, 2013Assignee: OFS Fitel, LLCInventors: Jeffrey W. Nicholson, Patrick W. Wisk, Man F. Yan
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Publication number: 20100284659Abstract: An optical waveguide has a refractive index variation that is structured to provide the fiber, over a wavelength operating range, with an effective area supporting multiple Stokes shifts and with a negative dispersion value at a target wavelength within the wavelength operating range. The refractive index variation is further structured to provide the fiber with a finite LP01 cutoff at a wavelength longer than the target wavelength, whereby the LP01 cutoff wavelength provides a disparity, for a selected bending diameter, between macrobending losses at the target wavelength and macrobending losses at wavelengths longer than the target wavelength, whereby Raman scattering is frustrated at wavelengths longer than the target wavelength.Type: ApplicationFiled: May 11, 2010Publication date: November 11, 2010Applicant: OFS FITEL LLC, a Delaware Limied Liability CompanyInventors: Jeffrey W. Nicholson, Patrick W. Wisk, Man F. Yan
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Patent number: 5459097Abstract: In accordance with the invention, aluminum-containing layers are grown by molecular beam processes using as an arsenic precursor phenylarsine (PhAs). Because PhAs is more reactive than arsine and less reactive than arsenic, it decomposes selectively on III-V surfaces but not on mask materials. Thus in contrast to conventional processes, growth using PhAs permits selective growth on unmasked gallium arsenide surfaces but inhibits growth on typical mask materials such as silicon nitride.Type: GrantFiled: October 7, 1993Date of Patent: October 17, 1995Assignee: AT&T Corp.Inventors: Cammy R. Abernathy, Stephen J. Pearton, Fan Ren, Patrick W. Wisk
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Patent number: 5227006Abstract: In accordance with the invention, gallium-containing layers are grown by molecular beam processes using as an arsenic precursor a compound of the dialkylaminoarsenic family (DAAAs) such as tris-dimethylamino arsenic (DMAAs). In contrast to conventional arsenic sources, DAAAs act as carbon "getters". When DAAAs are used as an arsenic source, the DAAAs getter carbon impurities from the gallium source. Thus, for example, DAAAs can be used as an arsenic source in combination with TMG as a gallium source to selectively grow high purity or n-type layers of gallium arsenide at low temperatures below 600.degree. C. In addition DMAAs has been found to be an excellent cleaning agent for gallium arsenide materials.Type: GrantFiled: November 27, 1991Date of Patent: July 13, 1993Assignee: AT&T Bell LaboratoriesInventors: Cammy R. Abernathy, Stephen J. Pearton, Fan Ren, Patrick W. Wisk