Patents by Inventor Lakshminarayanan Ravi Narasimhan

Lakshminarayanan Ravi Narasimhan 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).

  • Publication number: 20240027687
    Abstract: A method of making a photonic integrated circuit (PIC) is provided. The method comprises depositing a functional resist material layer over a substrate, disposing and pressing a stamp with a plurality of nanopatterns into the functional resist material for a period of time, and removing the stamp from the functional resist material to provide nanofeatures that are inverted versions of the nanopatterns, wherein the nanofeatures form one or more optical elements.
    Type: Application
    Filed: October 2, 2023
    Publication date: January 25, 2024
    Inventors: MARK WILLIAM KNIGHT, STEPHANIE ROXANE SANDOR-LEAHY, LAKSHMINARAYANAN RAVI NARASIMHAN
  • Patent number: 11835763
    Abstract: A method of making a photonic integrated circuit (PIC) is provided. The method comprises depositing a functional resist material layer over a substrate, disposing and pressing a stamp with a plurality of nanopatterns into the functional resist material for a period of time, and removing the stamp from the functional resist material to provide nanofeatures that are inverted versions of the nanopatterns, wherein the nanofeatures form one or more optical elements.
    Type: Grant
    Filed: October 22, 2021
    Date of Patent: December 5, 2023
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Mark William Knight, Stephanie Roxane Sandor-Leahy, Lakshminarayanan Ravi Narasimhan
  • Publication number: 20230128056
    Abstract: A method of making a photonic integrated circuit (PIC) is provided. The method comprises depositing a functional resist material layer over a substrate, disposing and pressing a stamp with a plurality of nanopatterns into the functional resist material for a period of time, and removing the stamp from the functional resist material to provide nanofeatures that are inverted versions of the nanopatterns, wherein the nanofeatures form one or more optical elements.
    Type: Application
    Filed: October 22, 2021
    Publication date: April 27, 2023
    Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: MARK WILLIAM KNIGHT, STEPHANIE ROXANE SANDOR-LEAHY, LAKSHMINARAYANAN RAVI NARASIMHAN
  • Patent number: 7630633
    Abstract: An all optical fiber bit stream reader system for examining the data contents of an optical fiber involving the conversion of a temporal timing signal into a spatially located signal is provided. The invention generally comprises generating and detecting a signal indicating the presence of data, in a manner which is minimally destructive to the data. One embodiment comprises providing a piece of optical fiber that exhibits a nonlinear response through a two photon absorption process and subsequent emission of a photon corresponding to the two photon absorption process. Such a fiber could comprise a conventional doped silica fiber into which an additional dopant has been introduced. Another embodiment involves modifying the index of refraction of the cladding of the optical fiber line. This causes a fraction of the electric field or light pulse guided through the fiber (if present) to be coupled out of the fiber. Thereafter, the pulse can be detected.
    Type: Grant
    Filed: June 5, 2007
    Date of Patent: December 8, 2009
    Inventors: C. Kumar N. Patel, Lakshminarayanan Ravi Narasimhan
  • Patent number: 7233739
    Abstract: An all optical fiber bit stream reader system for examining the data contents of an optical fiber involving the conversion of a temporal timing signal into a spatially located signal is provided. The invention generally comprises generating and detecting a signal indicating the presence of data, in a manner which is minimally destructive to the data. One embodiment comprises providing a piece of optical fiber that exhibits a nonlinear response through a two photon absorption process and subsequent emission of a photon corresponding to the two photon absorption process. Such a fiber could comprise a conventional doped silica fiber into which an additional dopant has been introduced. Another embodiment involves modifying the index of refraction of the cladding of the optical fiber line. This causes a fraction of the electric field or light pulse guided through the fiber (if present) to be coupled out of the fiber. Thereafter, the pulse can be detected.
    Type: Grant
    Filed: October 22, 2002
    Date of Patent: June 19, 2007
    Inventors: C. Kumar N. Patel, Lakshminarayanan Ravi Narasimhan