Patents by Inventor Daiping Ma
Daiping Ma 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: 8297854Abstract: Fiber optic assemblies including at least one multimode optical fiber that have improved performance are disclosed. In one embodiment, at least one connector is mounted upon and end of at least one multimode optical fiber and the assembly has an insertion loss of about 0.04 dB or less at a reference wavelength of 850 nanometers. Another embodiment is directed to a fiber optic assembly having a plurality of multimode optical fibers attached to a multifiber ferrule. The multifiber ferrule has a pair of guide pin bores having a nominal diameter, wherein the guide pin bores have a tolerance of ±0.0005 millimeters from a nominal diameter for improving performance.Type: GrantFiled: August 11, 2011Date of Patent: October 30, 2012Assignee: Corning Cable Systems LLCInventors: Scott Robertson Bickham, Radawan Hall, James Phillip Luther, Daiping Ma
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Publication number: 20110305420Abstract: Fiber optic assemblies including at least one multimode optical fiber that have improved performance are disclosed. In one embodiment, at least one connector is mounted upon and end of at least one multimode optical fiber and the assembly has an insertion loss of about 0.04 dB or less at a reference wavelength of 850 nanometers. Another embodiment is directed to a fiber optic assembly having a plurality of multimode optical fibers attached to a multifiber ferrule. The multifiber ferrule has a pair of guide pin bores having a nominal diameter, wherein the guide pin bores have a tolerance of ±0.0005 millimeters from a nominal diameter for improving performance.Type: ApplicationFiled: August 11, 2011Publication date: December 15, 2011Inventors: Scott Robertson Bickham, Radawan Hall, James Phillip Luther, Daiping Ma
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Patent number: 7558461Abstract: An optical fiber comprising a core having a refractive index profile and a centerline; and a cladding layer surrounding and directly adjacent the core; wherein core includes updoping material and is doped with Aluminum in at least one region of the core, such that either: (a) the average longitudinal acoustic wave velocity within the core is within 0.05% of the longitudinal acoustic wave velocity within the cladding; or (b) the longitudinal acoustic wave velocity in the core changes by at least 0.2%.Type: GrantFiled: June 14, 2006Date of Patent: July 7, 2009Assignee: Corning IncorporatedInventors: Xin Chen, Stuart Gray, Ming-Jun Li, Daiping Ma, Daniel Aloysius Nolan, Alranzo Boh Ruffin, Donnell Thaddeus Walton, Ji Wang
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Publication number: 20070116416Abstract: An optical fiber comprising a core having a refractive index profile and a centerline; and a cladding layer surrounding and directly adjacent the core; wherein core includes updoping material and is doped with Aluminum in at least one region of the core, such that either: (a) the average longitudinal acoustic wave velocity within the core is within 0.05% of the longitudinal acoustic wave velocity within the cladding; or (b) the longitudinal acoustic wave velocity in the core changes by at least 0.2%.Type: ApplicationFiled: June 14, 2006Publication date: May 24, 2007Inventors: Xin Chen, Stuart Gray, Ming-Jun Li, Daiping Ma, Daniel Nolan, Alranzo Ruffin, Donnell Walton, Ji Wang
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Patent number: 6952519Abstract: An optical waveguide fiber having a high threshold for stimulated Brillouin scattering. The optical fiber preferably has large optical effective area, and further preferably has a low zero dispersion wavelength.Type: GrantFiled: April 5, 2004Date of Patent: October 4, 2005Assignee: Corning IncorporatedInventors: Scott R. Bickham, Dipakbin Q. Chowdhury, Madison L. Howard, Shiva Kumar, Daiping Ma, Snigdharaj K. Mishra, A. Boh Ruffin, Sergey Y. Ten
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Publication number: 20040218882Abstract: An optical waveguide fiber having a high threshold for stimulated Brillouin scattering. The optical fiber preferably has large optical effective area, and further preferably has a low zero dispersion wavelength.Type: ApplicationFiled: April 5, 2004Publication date: November 4, 2004Inventors: Scott R. Bickham, Dipakbin Q. Chowdhury, Madison L. Howard, Shiva Kumar, Daiping Ma, Snigdharaj K. Mishra, A. Boh Ruffin, Sergey Y. Ten
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Patent number: 6798962Abstract: The present invention provides an optical fiber, comprising a core having an alpha parameter in the range of approximately 2 to approximately 8, a maximum index percent difference between the core and a cladding in the range of approximately 0.3% to approximately 0.5% and a core diameter in the range of approximately 6.0 to approximately 16.0 &mgr;m and a cladding. The optical fiber has a bandwidth of at least approximately 0.6 GHz.km at 850 nm, and is configured for multimode operation at a wavelength less than 1300 nm and single mode operation at a wavelength of at least approximately 1300 nm. The fiber also has significantly reduced intermodal noise. The present invention also includes a method of designing such a fiber, a fiber optic system provided such a fiber and a method of operating a fiber optic system with such a fiber.Type: GrantFiled: February 26, 2002Date of Patent: September 28, 2004Assignee: Corning IncorporatedInventors: George E. Berkey, Yanming Liu, Walter F. Love, Daiping Ma
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Patent number: 6760527Abstract: An optical waveguide fiber having a relatively large effective area which exhibits low attenuation, low PMD and low microbending sensitivity. A step-index refractive index profile is advantageously used.Type: GrantFiled: May 29, 2003Date of Patent: July 6, 2004Assignee: Corning IncorporatedInventors: George E. Berkey, Daiping Ma, Snigdharaj K. Mishra
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Publication number: 20030210877Abstract: An optical waveguide fiber having a relatively large effective area which exhibits low attenuation, low PMD and low microbending sensitivity. A step-index refractive index profile is advantageously used.Type: ApplicationFiled: May 29, 2003Publication date: November 13, 2003Inventors: George E. Berkey, Daiping Ma, Snigdharaj K. Mishra
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Patent number: 6618533Abstract: Disclosed is a single mode optical waveguide having a segmented core of at least two segments. The relative refractive index, the index profile and the radial dimensions of the core segments are selected to provide an optical waveguide fiber having properties suitable for a high performance telecommunication system operating in the wavelength window of about 1530 nm to 1570 nm. Embodiments of the invention having two, three and four segments are described.Type: GrantFiled: May 31, 2002Date of Patent: September 9, 2003Assignee: Corning IncorporatedInventors: Daiping Ma, David Kinney Smith
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Publication number: 20030161597Abstract: The present invention provides an optical fiber, comprising a core having an alpha parameter in the range of approximately 2 to approximately 8, a maximum index percent difference between the core and a cladding in the range of approximately 0.3% to approximately 0.5% and a core diameter in the range of approximately 6.0 to approximately 16.0 &mgr;m and a cladding. The optical fiber has a bandwidth of at least approximately 0.6 GHz.km at 850 nm, and is configured for multimode operation at a wavelength less than 1300 nm and single mode operation at a wavelength of at least approximately 1300 nm. The fiber also has significantly reduced intermodal noise. The present invention also includes a method of designing such a fiber, a fiber optic system provided such a fiber and a method of operating a fiber optic system with such a fiber.Type: ApplicationFiled: February 26, 2002Publication date: August 28, 2003Inventors: George E. Berkey, Yanming Liu, Walter F. Love, Daiping Ma
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Patent number: 6611647Abstract: An optical waveguide fiber having a relatively large effective area which exhibits low attenuation, low PMD and low microbending sensitivity. A step-index refractive index profile is advantageously used.Type: GrantFiled: November 28, 2001Date of Patent: August 26, 2003Assignee: Corning IncorporatedInventors: George E. Berkey, Daiping Ma, Snigdharaj K. Mishra
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Publication number: 20030086667Abstract: An optical waveguide fiber having a relatively large effective area which exhibits low attenuation, low PMD and low microbending sensitivity. A step-index refractive index profile is advantageously used.Type: ApplicationFiled: November 28, 2001Publication date: May 8, 2003Inventors: George E. Berkey, Daiping Ma, Snigdharaj K. Mishra
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Publication number: 20030053779Abstract: Disclosed is a single mode optical waveguide having a segmented core of at least two segments. The relative refractive index, the index profile and the radial dimensions of the core segments are selected to provide an optical waveguide fiber having properties suitable for a high performance telecommunication system operating in the wavelength window of about 1530 nm to 1570 nm. Embodiments of the invention having two, three and four segments are described.Type: ApplicationFiled: May 31, 2002Publication date: March 20, 2003Inventors: Daiping Ma, David Kinney Smith
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Patent number: 6424777Abstract: Disclosed is a single mode optical waveguide having a segmented core of at least two segments. The relative refractive index, the index profile and the radial dimensions of the core segments are selected to provide an optical waveguide fiber having properties suitable for a high performance telecommunication system operating in the wavelength window of about 1530 nm to 1570 nm. Embodiments of the invention having two, three and four segments are described.Type: GrantFiled: January 9, 2001Date of Patent: July 23, 2002Assignee: Corning IncorporatedInventors: Daiping Ma, David Kinney Smith
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Patent number: 6404965Abstract: Disclosed is a single mode optical waveguide fiber having a core refractive index profile in which the profile parameters are selected to provide an attenuation minimum. A set of profiles having the same general shape and dimensions is shown to have a group of profiles contained in a sub-set which exhibit a minimum of attenuation as compared to the remaining members of the set. The members of the sub-set have been found to have the lowest effective group index, ngeff, and the lowest change in &bgr;2 under waveguide fiber bending.Type: GrantFiled: July 3, 2001Date of Patent: June 11, 2002Assignee: Corning IncorporatedInventors: Peter C. Jones, Daiping Ma, David K. Smith
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Publication number: 20010046359Abstract: Disclosed is a single mode optical waveguide fiber having a core refractive index profile in which the profile parameters are selected to provide an attenuation minimum. A set of profiles having the same general shape and dimensions is shown to have a group of profiles contained in a sub-set which exhibit a minimum of attenuation as compared to the remaining members of the set. The members of the sub-set have been found to have the lowest effective group index, ngeff, and the lowest change in &bgr;2 under waveguide fiber bending.Type: ApplicationFiled: July 3, 2001Publication date: November 29, 2001Inventors: Peter C. Jones, Daiping Ma, David K. Smith
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Patent number: 6282354Abstract: Disclosed is a single mode optical waveguide fiber having a core refractive index profile in which the profile parameters are selected to provide an attenuation minimum. A set of profiles having the same general shape and dimensions is shown to have a group of profiles contained in a sub-set which exhibit a minimum of attenuation as compared to the remaining members of the set. The members of the sub-set have been found to have the lowest effective group index, ngeff, and the lowest change in &bgr;2 under waveguide fiber bending.Type: GrantFiled: August 17, 2000Date of Patent: August 28, 2001Assignee: Corning IncorporatedInventors: Peter C. Jones, Daiping Ma, David K. Smith
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Publication number: 20010001624Abstract: Disclosed is a single mode optical waveguide having a segmented core of at least two segments. The relative refractive index, the index profile and the radial dimensions of the core segments are selected to provide an optical waveguide fiber having properties suitable for a high performance telecommunication system operating in the wavelength window of about 1530 nm to 1570 nm. Embodiments of the invention having two, three and four segments are described.Type: ApplicationFiled: January 9, 2001Publication date: May 24, 2001Applicant: Corning IncorporatedInventors: Daiping Ma, David Kinney Smith
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Patent number: RE39028Abstract: Disclosed is a single made optical waveguide fiber having a segmented core design. In particular, the core comprises three segments, each having characteristic dimensions and refractive index profile. By proper choice of index profile in each segment, a waveguide fiber is made which has a mode field diameter of about 9.5, low, positive total dispersion over the operating window 1530 nm to 1565 nm as well as effective area greater than 60 ?m2.Type: GrantFiled: February 27, 2002Date of Patent: March 21, 2006Assignee: Corning IncorporatedInventors: Ming-Jun Li, Yanming Liu, Daiping Ma, David Kinney Smith