Patents by Inventor Mark D. Feuer

Mark D. Feuer 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: 10916165
    Abstract: A display system that produces an image that encodes both machine-readable and human-readable data is described. The image has two underlying patterns that are changed at two different rates. The rapidly changing image encodes the machine-readable data and the slower changing image encodes the human-readable data.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: February 9, 2021
    Assignee: Research Foundation of the City University of New York
    Inventor: Mark D. Feuer
  • Publication number: 20180247580
    Abstract: A display system that produces an image that encodes both machine-readable and human-readable data is described. The image has two underlying patterns that are changed at two different rates. The rapidly changing image encodes the machine-readable data and the slower changing image encodes the human-readable data.
    Type: Application
    Filed: February 27, 2018
    Publication date: August 30, 2018
    Inventor: Mark D. Feuer
  • Patent number: 9100127
    Abstract: A method and system for encoding and determining labels in a Dual Polarization (DP) Quaternary Phase Shift Keying (QPSK) signal is provided. A label frame, signature sequence, and data payload are combined using a complementary constant-weight code encoding (CCWC) encoder, the output of which is deinterleaved and differentially precoded to generate a polarized tributary of a DP-QPSK signal. This encoding can be duplicated for a second tributary of the DP-QPSK signal. The label can be determined using one or more polarizers and corresponding low-speed photodetectors, each applied to a copy of the DP-QPSK signal. The strongest output of the photodetectors is then used to determine the label. Alternatively, the DP-QPSK signal can be viewed as having XI, XQ, PH, and PV tributaries. These tributaries can then be translated into XI, XQ, YI, and YQ tributaries are encoded into a standard DP-QPSK signal.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: August 4, 2015
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Mark D. Feuer, Vinay A. Vaishampayan
  • Patent number: 9031419
    Abstract: A fiber optic system includes a transmitter for transmitting high-speed streaming electrical data to a receiver for receiving the high-speed data. In order to transmit multiple channels in the system at high-speeds, an electrical data signal is converted into multiple optical sub-signals. Each of the multiple optical sub-signals are transmitted at the common wavelength on multi-spatial mode media. The receiver receives the multiple optical sub-signals as a multi-spatial mode optical signal and separates the multi-spatial mode optical signal into branch signals having a common wavelength. The receiver mixes each of the branch signals with optical carrier waves having the common wavelength and converts the branch signals into electrical signals. Digital signal processing is used to recover the data sub-signals which are used to recover the original data signal.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: May 12, 2015
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Sheryl Woodward, Martin Birk, Michael Brodsky, Lynn E. Nelson, Xiang Zhou, Mark D. Feuer
  • Patent number: 9014561
    Abstract: A method and system for upgrading service to an optical network terminal among a plurality of optical network terminals on a passive optical network. The upgrade enables bidirectional communications between a central office and the optical network terminal over dedicated downstream and upstream wavelength channels outside the downstream and upstream wavelength bands associated with the passive optical network. The optical network terminal to receive upgraded service is disconnected from a passive optical splitter at a remote node serving the optical network terminal, and optically coupled to a port of the multi-port arrayed waveguide grating at the remote node. Wavelength taps are provided at the central office and the remote node to facilitate multiplexing and demultiplexing the dedicated downstream and upstream channels with the downstream and upstream wavelength bands associated with the passive optical network.
    Type: Grant
    Filed: February 1, 2007
    Date of Patent: April 21, 2015
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Patrick P. Iannone, Mark D. Feuer, Kenneth C. Reichmann, Kent G. McCammon
  • Patent number: 8811787
    Abstract: Various apparatus and methods for reducing inter-core crosstalk in a multicore optical fiber are disclosed. A multicore optical fiber may include a plurality of cores capable of transmitting optical signals, and a cladding surrounding the cores, the cladding having a heterogeneous refractive index such that the optical signals propagate at different velocities in different ones of the cores. A multicore optical fiber may include a first length including cores having heterogeneous modal velocities and a second length, adjacent to the first length, including cores having heterogeneous modal velocities, and the cores in the first length are aligned with cores in the second length having a different modal velocity. Inter-core cross talk in a multicore optical fiber may also be reduced by transmitting optical signals through cores of a multicore optical fiber and pumping light into the cores to create unequal modal velocities in the cores.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: August 19, 2014
    Assignee: AT&T Intellectual Property I, L.P.
    Inventor: Mark D. Feuer
  • Publication number: 20130136404
    Abstract: Various apparatus and methods for reducing inter-core crosstalk in a multicore optical fiber are disclosed. A multicore optical fiber may include a plurality of cores capable of transmitting optical signals, and a cladding surrounding the cores, the cladding having a heterogeneous refractive index such that the optical signals propagate at different velocities in different ones of the cores. A multicore optical fiber may include a first length including cores having heterogeneous modal velocities and a second length, adjacent to the first length, including cores having heterogeneous modal velocities, and the cores in the first length are aligned with cores in the second length having a different modal velocity. Inter-core cross talk in a multicore optical fiber may also be reduced by transmitting optical signals through cores of a multicore optical fiber and pumping light into the cores to create unequal modal velocities in the cores.
    Type: Application
    Filed: November 30, 2011
    Publication date: May 30, 2013
    Applicant: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventor: Mark D. Feuer
  • Publication number: 20130077967
    Abstract: A fiber optic system includes a transmitter for transmitting high-speed streaming electrical data to a receiver for receiving the high-speed data. In order to transmit multiple channels in the system at high-speeds, an electrical data signal is converted into multiple optical sub-signals. Each of the multiple optical sub-signals are transmitted at the common wavelength on multi-spatial mode media. The receiver receives the multiple optical sub-signals as a multi-spatial mode optical signal and separates the multi-spatial mode optical signal into branch signals having a common wavelength. The receiver mixes each of the branch signals with optical carrier waves having the common wavelength and converts the branch signals into electrical signals. Digital signal processing is used to recover the data sub-signals which are used to recover the original data signal.
    Type: Application
    Filed: September 28, 2011
    Publication date: March 28, 2013
    Applicant: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: Sheryl Woodward, Martin Birk, Michael Brodsky, Mark D. Feuer, Lynn E. Nelson, Xiang Zhou
  • Patent number: 8351788
    Abstract: A method and system for encoding and determining labels in a Dual Polarization (DP) Quaternary Phase Shift Keying (QPSK) signal is provided. A label frame, signature sequence, and data payload are combined using a complementary constant-weight code encoding (CCWC) encoder, the output of which is deinterleaved and differentially precoded to generate a polarized tributary of a DP-QPSK signal. This encoding can be duplicated for a second tributary of the DP-QPSK signal. The label can be determined using one or more polarizers and corresponding low-speed photodetectors, each applied to a copy of the DP-QPSK signal. The strongest output of the photodetectors is then used to determine the label. Alternatively, the DP-QPSK signal can be viewed as having XI, XQ, PH, and PV tributaries. These tributaries can then be translated into XI, XQ, YI, and YQ tributaries are encoded into a standard DP-QPSK signal.
    Type: Grant
    Filed: July 14, 2010
    Date of Patent: January 8, 2013
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Mark D. Feuer, Vinay Anant Vaishampayan
  • Patent number: 8131150
    Abstract: A tunable bidirectional multiplexer/demultiplexer (MUX/DEMUX) is disclosed for adding and dropping wavelength channels between an optical transmission system and at least one optical transceiver. The MUX/DEMUX includes at least one add port for adding wavelength channels, at least one drop port for dropping wavelength channels, and at least one first optical circulator coupled to the at least one drop port and the at least one add port. The MUX/DEMUX further includes at least one 1×N wavelength-selective switch coupled to the at least one first optical circulator, and at least one second optical circulator coupled to at least one transceiver port on a second side of the at least one wavelength-selective switch, where the optical circulators and switching components are disposed within a common housing.
    Type: Grant
    Filed: June 7, 2006
    Date of Patent: March 6, 2012
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Mark D. Feuer, Sheryl L. Woodward
  • Publication number: 20120014695
    Abstract: A method and system for encoding and determining labels in a Dual Polarization (DP) Quaternary Phase Shift Keying (QPSK) signal is provided. A label frame, signature sequence, and data payload are combined using a complementary constant-weight code encoding (CCWC) encoder, the output of which is deinterleaved and differentially precoded to generate a polarized tributary of a DP-QPSK signal. This encoding can be duplicated for a second tributary of the DP-QPSK signal. The label can be determined using one or more polarizers and corresponding low-speed photodetectors, each applied to a copy of the DP-QPSK signal. The strongest output of the photodetectors is then used to determine the label. Alternatively, the DP-QPSK signal can be viewed as having XI, XQ, PH, and PV tributaries. These tributaries can then be translated into XI, XQ, YI, and YQ tributaries are encoded into a standard DP-QPSK signal.
    Type: Application
    Filed: July 14, 2010
    Publication date: January 19, 2012
    Applicant: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: Mark D. Feuer, Vinay Anant Vaishampayan
  • Patent number: 7792407
    Abstract: A method for fabricating an optical device wherein the device comprises a first substrate wafer with at least one buried optical waveguide on an approximately flat planar surface of the substrate and a second substrate wafer with at least a second buried optical waveguide. The waveguides so formed may be straight or curved along the surface of the wafer or curved by burying the waveguide at varying depth along its length. The second wafer is turned (flipped) and bonded to the first wafer in such a manner that the waveguides, for example, may form an optical coupler or may cross over one another and be in proximate relationship along a region of each. As a result, three-dimensional optical devices are formed avoiding the convention techniques of layering on a single substrate wafer.
    Type: Grant
    Filed: September 5, 2008
    Date of Patent: September 7, 2010
    Assignee: AT&T Intellectual Property II
    Inventors: Mark D. Feuer, Nicholas J. Frigo
  • Patent number: 7580632
    Abstract: A system and method that utilizes digital coding techniques to combine a high-rate data stream with a lower rate side data stream to produce a combined data stream in such a way that the side data can be extracted by an inexpensive, low-bandwidth receiver. The method generally comprises the steps of: combining at least one payload data stream with at least one side data stream into a composite electrical data stream; applying the composite data stream to an optical transmitter to produce an optical signal; detecting the optical signal with an optical receiver having a maximum frequency of operation less than one-half of the rate of the composite data stream; and recovering the side data stream from the electrical output of the optical receiver.
    Type: Grant
    Filed: April 8, 2005
    Date of Patent: August 25, 2009
    Assignee: AT&T Intellectual Property II, LP
    Inventors: Mark D. Feuer, Vinay V. Vaishampayan
  • Publication number: 20090092355
    Abstract: A method for fabricating an optical device wherein the device comprises a first substrate wafer with at least one buried optical waveguide on an approximately flat planar surface of the substrate and a second substrate wafer with at least a second buried optical waveguide. The waveguides so formed may be straight or curved along the surface of the wafer or curved by burying the waveguide at varying depth along its length. The second wafer is turned (flipped) and bonded to the first wafer in such a manner that the waveguides, for example, may form an optical coupler or may cross over one another and be in proximate relationship along a region of each. As a result, three-dimensional optical devices are formed avoiding the convention techniques of layering on a single substrate wafer.
    Type: Application
    Filed: September 5, 2008
    Publication date: April 9, 2009
    Inventors: Mark D. Feuer, Nicholas J. Frigo
  • Patent number: 7437031
    Abstract: A method for fabricating an optical device wherein the device comprises a first substrate wafer with at least one buried optical waveguide on an approximately flat planar surface of the substrate and a second substrate wafer with at least a second buried optical waveguide. The waveguides so formed may be straight or curved along the surface of the wafer or curved by burying the waveguide at varying depth along its length. The second wafer is turned (flipped) and bonded to the first wafer in such a manner that the waveguides, for example, may form an optical coupler or may cross over one another and be in proximate relationship along a region of each. As a result, three-dimensional optical devices are formed avoiding the convention techniques of layering on a single substrate wafer.
    Type: Grant
    Filed: February 16, 2007
    Date of Patent: October 14, 2008
    Assignee: AT&T Corp.
    Inventors: Mark D. Feuer, Nicholas J. Frigo
  • Patent number: 7366417
    Abstract: A method and a system in which selected wavelengths of a wavelength division multiplexed (WDM) signal are modulated with multicast data for multicasting data services on an optical network. The WDM signal is received from a hub node of the optical network, such as a unidirectional ring network or a bi-directional ring network. A four-port wavelength crossbar switch (4WCS) selectably switches selected wavelengths from the optical network to a modulator loop. The modulator loop includes a multicast modulator that modulates the selected plurality of wavelengths with the multicast data. Each modulated wavelength is then switched back to the optical network by the 4WCS switch, and sent to a plurality of subscriber nodes of the optical network. This architecture allows a facility provider to be physically separated from a content provider, and affords the flexibility of selectively delivering multicast content to individual subscribers.
    Type: Grant
    Filed: January 10, 2006
    Date of Patent: April 29, 2008
    Assignee: AT&T Corp.
    Inventors: Mark D. Feuer, Nicholas J. Frigo, Cedric F. Lam
  • Patent number: 7362932
    Abstract: An optical device comprises a first substrate wafer with at least one buried optical waveguide on an approximately flat planar surface of the substrate and a second substrate wafer with at least a second buried optical waveguide. The waveguides so formed may be straight or curved along the surface of the wafer or curved by burying the waveguide at varying depth along its length. The second wafer is turned (flipped) and bonded to the first wafer in such a manner that the waveguides, for example, may form an optical coupler or may cross over one another and be in proximate relationship along a region of each. As a result, three-dimensional optical devices are formed avoiding the convention techniques of layering on a single substrate wafer.
    Type: Grant
    Filed: November 22, 2006
    Date of Patent: April 22, 2008
    Assignee: AT&T Corp.
    Inventors: Mark D. Feuer, Nicholas J. Frigo
  • Publication number: 20070286605
    Abstract: A tunable bidirectional multiplexer/demultiplexer (MUX/DEMUX) is disclosed for adding and dropping wavelength channels between an optical transmission system and at least one optical transceiver. The MUX/DEMUX includes at least one add port for adding wavelength channels to the optical transmission system, at least one drop port for dropping wavelength channels from the optical transmission system, and at least one first optical circulator coupled to the at least one drop port and the at least one add port.
    Type: Application
    Filed: June 7, 2006
    Publication date: December 13, 2007
    Inventors: Mark D. Feuer, Sheryl L. Woodward
  • Patent number: 7200303
    Abstract: An optical device comprises a first substrate wafer with at least one buried optical waveguide on an approximately flat planar surface of the substrate and a second substrate wafer with at least a second buried optical waveguide. The waveguides so formed may be straight or curved along the surface of the wafer or curved by burying the waveguide at varying depth along its length. The second wafer is turned (flipped) and bonded to the first wafer in such a manner that the waveguides, for example, may form an optical coupler or may cross over one another and be in proximate relationship along a region of each. As a result, three dimensional optical devices are formed avoiding the convention techniques of layering on a single substrate wafer.
    Type: Grant
    Filed: August 31, 2005
    Date of Patent: April 3, 2007
    Inventors: Mark D. Feuer, Nicholas J. Frigo
  • Patent number: 7164826
    Abstract: A method for fabricating optical devices comprises the steps of preparing a first substrate wafer with at least one buried optical waveguide on an approximately flat planar surface of the substrate and a second substrate wafer with at least a second buried optical waveguide. The waveguides so formed may be straight or be curved along the surface of the wafer or curved by burying the waveguide at varying depth along its length. The second wafer is turned (flipped) and bonded to the first wafer in such a manner that the waveguides, for example, may form an optical coupler or may crossover one another and be in proximate relationship along a region of each. As a result, three dimensional optical devices are formed avoiding conventional techniques of layering on a single substrate wafer. Optical crossover angles may be reduced, for example, to thirty degrees from ninety degrees saving substrate real estate.
    Type: Grant
    Filed: January 10, 2006
    Date of Patent: January 16, 2007
    Assignee: AT&T Corp.
    Inventors: Mark D. Feuer, Nicholas J. Frigo