Patents by Inventor Pingfan P. Wu
Pingfan P. Wu 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).
-
Patent number: 8842351Abstract: A method for storing data including: providing a first substrate having a plurality of micro-holograms therein, the micro-holograms being indicative of the data; providing a second hologram-supporting substrate; illuminating the plurality of micro-holograms in the first substrate through the second substrate, thereby producing a holographic pattern in the second substrate indicative of reflections of the plurality of micro-holograms in the first substrate; providing a third hologram-supporting substrate; and, illuminating the holographic pattern in the second substrate through the third substrate, thereby substantially replicating the plurality of micro-holograms in the first substrate in the third substrate.Type: GrantFiled: June 17, 2008Date of Patent: September 23, 2014Assignee: General Electric CompanyInventors: Brian L. Lawrence, Marc Dubois, Pingfan P. Wu, Joseph L. Smolenski, Xiaolei Shi, Eugene P. Boden
-
Patent number: 7359584Abstract: The present invention relates to a device for use in a fiber optic system that may be a communication system, a sensing system or other system using guided-wave optical components. Reducing the number of lenses required to couple the waveguides and the free-space paths in the device offers the dual advantages of a reduced component count and simplified alignment. In an exemplary device having a first and second waveguides, a birefringent optical system defines bi-directional, polarization-dependent free-space paths. One of the bidirectional, polarization-dependent, free-space paths couples at least the first waveguide to the second waveguide. The birefringent optical system includes at least one prism for bending one of the polarization-dependent paths in a clockwise direction and one of the polarization-dependent paths in a counterclockwise direction.Type: GrantFiled: December 22, 2006Date of Patent: April 15, 2008Assignee: ADC Telecommunications, Inc.Inventors: Pingfan P. Wu, Liang-Ju Lu, Zhicheng Yang, Boying Barry Zhang
-
Patent number: 7206479Abstract: The present invention relates to a device for use in a fiber optic system that may be a communication system, a sensing system or other system using guided-wave optical components. Reducing the number of lenses required to couple the waveguides and the free-space paths in the device offers the dual advantages of a reduced component count and simplified alignment. In an exemplary device having a first and second waveguides, a birefringent optical system defines bi-directional, polarization-dependent free-space paths. One of the bi-directional, polarization-dependent, free-space paths couples at least the first waveguide to the second waveguide. The birefringent optical system includes at least one prism for bending one of the polarization-dependent paths in a clockwise direction and one of the polarization-dependent paths in a counterclockwise direction.Type: GrantFiled: May 14, 2004Date of Patent: April 17, 2007Assignee: ADC Telecommunications, Inc.Inventors: Pingfan P. Wu, Liang-Ju Lu, Zhicheng Yang, Boying Barry Zhang
-
Publication number: 20040213512Abstract: The present invention relates to a device for use in a fiber optic system that may be a communication system, a sensing system or other system using guided-wave optical components. Reducing the number of lenses required to couple the waveguides and the free-space paths in the device offers the dual advantages of a reduced component count and simplified alignment. In an exemplary device having a first and second waveguides, a birefringent optical system defines bi-directional, polarization-dependent free-space paths. One of the bi-directional, polarization-dependent, free-space paths couples at least the first waveguide to the second waveguide. The birefringent optical system includes at least one prism for bending one of the polarization-dependent paths in a clockwise direction and one of the polarization-dependent paths in a counterclockwise direction.Type: ApplicationFiled: May 14, 2004Publication date: October 28, 2004Inventors: Pingfan P. Wu, Liang-Ju Lu, Zhicheng Yang, Boying Barry Zhang
-
Patent number: 6741764Abstract: The present invention relates to a device for use in a fiber optic system that may be a communication system, a sensing system or other system using guided-wave optical components. Reducing the number of lenses required to couple the waveguides and the free-space paths in the device offers the dual advantages of a reduced component count and simplified alignment. In an exemplary device having a first and second waveguides, a birefringent optical system defines bi-directional, polarization-dependent free-space paths. One of the bidirectional, polarization-dependent, free-space paths couples at least the first waveguide to the second waveguide. The birefringent optical system includes at least one prism for bending one of the polarization-dependent paths in a clockwise direction and one of the polarization-dependent paths in a counterclockwise direction.Type: GrantFiled: November 13, 2001Date of Patent: May 25, 2004Assignee: ADC Telecommunications, Inc.Inventors: Pingfan P. Wu, Liang-Ju Lu, Zhicheng Yang, Boying Barry Zhang
-
Publication number: 20030091261Abstract: The present invention relates to a device for use in a fiber optic system that may be a communication system, a sensing system or other system using guided-wave optical components. Reducing the number of lenses required to couple the waveguides and the free-space paths in the device offers the dual advantages of a reduced component count and simplified alignment. In an exemplary device having a first and second waveguides, a birefringent optical system defines bi-directional, polarization-dependent free-space paths. One of the bidirectional, polarization-dependent, free-space paths couples at least the first waveguide to the second waveguide. The birefringent optical system includes at least one prism for bending one of the polarization-dependent paths in a clockwise direction and one of the polarization-dependent paths in a counterclockwise direction.Type: ApplicationFiled: November 13, 2001Publication date: May 15, 2003Applicant: ADC Telecommunications, Inc.Inventors: Pingfan P. Wu, Liang-Ju Lu, Zhicheng Yang, Boying Barry Zhang
-
Publication number: 20030091276Abstract: A grating-based MUX/DMUX reduces temporal distortion. In one embodiment, and optical device that has a multi-channel port and a plurality of single-channel ports. At least one of the multi-channel port and the single-channel ports include a waveguide with a cross-sectional dimension that is smaller at an internal portion of the waveguide than at an aperture of the waveguide. An optical system has wavelength-dependent, free-space paths that couple light between the single-channel ports and the multi-channel ports. The waveguide aperture is coupled to one of the wavelength-dependent, free-space paths.Type: ApplicationFiled: November 13, 2001Publication date: May 15, 2003Applicant: ADC Telecommunications, Inc.Inventors: Qi Wang, Boying Barry Zhang, Pingfan P. Wu
-
Publication number: 20030076568Abstract: An improved optical frequency stabilization unit utilizes the frequency-dependent phase retardation of a birefringent element as a frequency reference. A light frequency stabilization unit includes a birefringent element having a longitudinal axis, the optic axis of the birefringent element is oriented to retard the phase of polarized light propagating through the element parallel to the longitudinal axis. The phase is retarded by an amount that is proportional to the frequency of the polarized light. A polarizer transmits a portion of the phase-retarded light. The magnitude of the transmitted portion is determined by the phase retardation amount. A first optical detector is disposed to detect the transmitted portion of light and to generate a first signal in response to the transmitted portion detected.Type: ApplicationFiled: October 22, 2001Publication date: April 24, 2003Applicant: ADC Telecommunications, Inc.Inventors: Pingfan P. Wu, Liang-Ju Lu