Patents by Inventor John Michael Miller

John Michael Miller 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: 9946134
    Abstract: A sub-wavelength grating is placed inside a liquid crystal variable optical retarder to reduce polarization dependence of the optical retardation generated by the variable optical retarder. A small thickness of the sub-wavelength grating, as compared to a conventional waveplate, reduces the driving voltage penalty due to the in-cell placement of the sub-wavelength grating.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: April 17, 2018
    Assignee: Lumentum Operations LLC
    Inventors: John Michael Miller, Gonzalo Wills
  • Publication number: 20180031744
    Abstract: A diffraction grating may include a substrate. The diffraction grating may include an etch stop layer to prevent etching of the substrate. The etch stop layer may be deposited on the substrate. The diffraction grating may include a marker layer to indicate an etch end-point associated with etching of a dielectric layer. The marker layer may be deposited on a portion of the etch stop layer. The diffraction grating may include the dielectric layer to form a grating layer after being etched. The dielectric layer may be deposited on at least the marker layer.
    Type: Application
    Filed: July 29, 2016
    Publication date: February 1, 2018
    Inventors: John Michael MILLER, Gonzalo WILLS, Lu TIAN, Michael O'LEARY
  • Patent number: 9866315
    Abstract: A method may include receiving, by a switching engine, an optical signal. The optical signal may carry a super-channel that includes a plurality of sub-carriers to be directed toward respective output ports. The switching engine may have a plurality of regions of pixels on which respective sub-carriers, of the plurality of sub-carriers, are incident. The method may include applying, by the switching engine, respective single beam steering gratings to first, overlapping, areas of the plurality of regions of pixels. The method may include applying, by the switching engine, one or more respective pluralities of beam steering gratings to second, overlapping areas of the plurality of regions of pixels. The method may include directing, based on the single beam steering gratings and the one or more pluralities of beam steering gratings, parts of the optical signal toward the respective output ports.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: January 9, 2018
    Assignee: Lumentum Operations LLC
    Inventors: Barrie Keyworth, John Michael Miller, Andrew Parks, Dan Burke, Peter David Roorda, Brandon C. Collings, Brian Smith
  • Publication number: 20170307785
    Abstract: A zoned waveplate has a series of transversely stacked birefringent zones alternating with non-birefringent zones. The birefringent and non-birefringent zones are integrally formed upon an AR-coated face of a single substrate by patterning the AR coated face of the substrate with zero-order sub-wavelength form-birefringent gratings configured to have a target retardance. The layer structure of the AR coating is designed to provide the target birefringence in the patterned zones and the reflection suppression.
    Type: Application
    Filed: April 24, 2017
    Publication date: October 26, 2017
    Inventors: John Michael Miller, Joel MILGRAM, Karen Denise HENDRIX, Michael O’LEARY, Hery DJIE, Lu TIAN, Paul COLBOURNE
  • Publication number: 20170299789
    Abstract: A reflective diffraction grating and a fabrication method are provided. The reflective diffraction grating includes a substrate, a UV-absorbing layer, a grating layer having a binary surface-relief pattern formed therein, and a conforming reflective layer. Advantageously, the UV-absorbing layer absorbs light at a UV recording wavelength to minimize reflection thereof by the substrate during holographic patterning at the UV recording wavelength.
    Type: Application
    Filed: June 30, 2017
    Publication date: October 19, 2017
    Inventors: John Michael MILLER, Hery DJIE, Patrick LU, Xiaowei GUO, Qinghong DU, Eddie CHIU, Chester MURLEY
  • Patent number: 9720147
    Abstract: A reflective diffraction grating and a fabrication method are provided. The reflective diffraction grating includes a substrate, a UV-absorbing layer, a grating layer having a binary surface-relief pattern formed therein, and a conforming reflective layer. Advantageously, the UV-absorbing layer absorbs light at a UV recording wavelength to minimize reflection thereof by the substrate during holographic patterning at the UV recording wavelength.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: August 1, 2017
    Assignee: Lumentum Operations LLC
    Inventors: John Michael Miller, Hery Djie, Patrick Lu, Xiaowei Guo, Qinghong Du, Eddie Chiu, Chester Murley
  • Publication number: 20170199374
    Abstract: A diffractive MEMS device has an in-plane binary reflective diffraction pattern formed in an outer surface of a tillable platform. The binary reflective diffraction pattern includes rectangular or trapezoidal ridges and valleys, or grooves, of a same depth. The binary reflective diffractive pattern has a high diffraction efficiency even though the surfaces of the “grooves” or “ridges” are not perpendicular to the incoming optical beam. The diffractive pattern is supported by a pair of torsional hinges and is tiltable by an electrostatic actuator. The electrostatic actuator can include at least one side electrode for linearization of dependence of tilt angle on the voltage applied to the actuator.
    Type: Application
    Filed: March 27, 2017
    Publication date: July 13, 2017
    Inventors: John Michael Miller, Wenlin JIN
  • Publication number: 20170168339
    Abstract: A sub-wavelength thin-film metal grating is placed inside a liquid crystal variable optical retarder at a selected distance from a reflective electrode to form a reflective half wave plate, thereby reducing polarization dependence of the optical retardation generated by the variable optical retarder. The approach enables to form within the device the reflective half wave plate that is suitably thin without modifying the reflective electrode of the device.
    Type: Application
    Filed: February 24, 2017
    Publication date: June 15, 2017
    Inventors: Keith Anderson, John Michael Miller, Hery Djie, Lu Tian
  • Patent number: 9632225
    Abstract: A zoned waveplate has a series of transversely stacked birefringent zones alternating with non-birefringent zones. The birefringent and non-birefringent zones are integrally formed upon an AR-coated face of a single substrate by patterning the AR coated face of the substrate with zero-order sub-wavelength form-birefringent gratings configured to have a target retardance. The layer structure of the AR coating is designed to provide the target birefringence in the patterned zones and the reflection suppression.
    Type: Grant
    Filed: July 14, 2015
    Date of Patent: April 25, 2017
    Assignee: Lumentum Operations LLC
    Inventors: John Michael Miller, Joel Milgram, Karen Denise Hendrix, Michael O'Leary, Hery Djie, Lu Tian, Paul Colbourne
  • Patent number: 9606273
    Abstract: A diffractive MEMS device has an in-plane binary reflective diffraction pattern formed in an outer surface of a tiltable platform. The binary reflective diffraction pattern includes rectangular or trapezoidal ridges and valleys, or grooves, of a same depth. The binary reflective diffractive pattern has a high diffraction efficiency even though the surfaces of the “grooves” or “ridges” are not perpendicular to the incoming optical beam. The diffractive pattern is supported by a pair of torsional hinges and is tiltable by an electrostatic actuator. The electrostatic actuator can include at least one side electrode for linearization of dependence of tilt angle on the voltage applied to the actuator.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: March 28, 2017
    Assignee: Lumentum Operations LLC
    Inventors: John Michael Miller, Wenlin Jin
  • Patent number: 9588374
    Abstract: A sub-wavelength thin-film metal grating is placed inside a liquid crystal variable optical retarder at a selected distance from a reflective electrode to form a reflective half wave plate, thereby reducing polarization dependence of the optical retardation generated by the variable optical retarder. The approach enables to form within the device the reflective half wave plate that is suitably thin without modifying the reflective electrode of the device.
    Type: Grant
    Filed: February 19, 2015
    Date of Patent: March 7, 2017
    Assignee: Lumentum Operations LLC
    Inventors: Keith Anderson, John Michael Miller, Hery Djie, Lu Tian
  • Publication number: 20170017028
    Abstract: A zoned waveplate has a series of transversely stacked birefringent zones alternating with non-birefringent zones. The birefringent and non-birefringent zones are integrally formed upon an AR-coated face of a single substrate by patterning the AR coated face of the substrate with zero-order sub-wavelength form-birefringent gratings configured to have a target retardance. The layer structure of the AR coating is designed to provide the target birefringence in the patterned zones and the reflection suppression.
    Type: Application
    Filed: July 14, 2015
    Publication date: January 19, 2017
    Inventors: John Michael MILLER, Joel MILGRAM, Karen Denise HENDRIX, Michael O'LEARY, Hery DJIE, Lu TIAN, Paul COLBOURNE
  • Publication number: 20160316281
    Abstract: A method may include receiving, by a switching engine, an optical signal. The optical signal may carry a super-channel that includes a plurality of sub-carriers to be directed toward respective output ports. The switching engine may have a plurality of regions of pixels on which respective sub-carriers, of the plurality of sub-carriers, are incident. The method may include applying, by the switching engine, respective single beam steering gratings to first, overlapping, areas of the plurality of regions of pixels. The method may include applying, by the switching engine, one or more respective pluralities of beam steering gratings to second, overlapping areas of the plurality of regions of pixels. The method may include directing, based on the single beam steering gratings and the one or more pluralities of beam steering gratings, parts of the optical signal toward the respective output ports.
    Type: Application
    Filed: April 22, 2016
    Publication date: October 27, 2016
    Inventors: Barrie KEYWORTH, John Michael Miller, Andrew Parks, Dan Burke, Peter David Roorda, Brandon C. Collings, Brian Smith
  • Patent number: 9190860
    Abstract: This disclosure provides systems, methods and apparatus for managing a capacitor system. In one aspect, an energy storage system includes a capacitor system, a charging circuit, and a controller. The capacitor system includes one or more capacitors. The charging circuit is configured to charge the capacitor system to a first target voltage. The controller is configured to detect a first condition and is programmed, in response to the first condition, to instruct the charging circuit to charge the capacitor system to a second target voltage that is less than the first target voltage. The controller is programmed to provide a notification that the capacitor system is operating in a degraded state.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: November 17, 2015
    Assignee: Maxwell Technologies, Inc.
    Inventors: Carl David Wright, Robert Shaw Lynds, John Michael Miller
  • Publication number: 20150276998
    Abstract: A reflective diffraction grating and a fabrication method are provided. The reflective diffraction grating includes a substrate, a UV-absorbing layer, a grating layer having a binary surface-relief pattern formed therein, and a conforming reflective layer. Advantageously, the UV-absorbing layer absorbs light at a UV recording wavelength to minimize reflection thereof by the substrate during holographic patterning at the UV recording wavelength.
    Type: Application
    Filed: March 28, 2014
    Publication date: October 1, 2015
    Inventors: John Michael MILLER, Hery DJIE, Patrick LU, Xiaowei GUO, Qinghong DU, Eddie CHIU, Chester MURLEY
  • Publication number: 20150234221
    Abstract: A sub-wavelength thin-film metal grating is placed inside a liquid crystal variable optical retarder at a selected distance from a reflective electrode to form a reflective half wave plate, thereby reducing polarization dependence of the optical retardation generated by the variable optical retarder. The approach enables to form within the device the reflective half wave plate that is suitably thin without modifying the reflective electrode of the device.
    Type: Application
    Filed: February 19, 2015
    Publication date: August 20, 2015
    Inventors: Keith ANDERSON, John Michael MILLER, Hery DJIE, Lu TIAN
  • Patent number: 8885245
    Abstract: A multi-layer hidden hinge and actuator design for high fill factor biaxial MEMS mirror array for wavelength selective switches (WSS) including a coarsely aligned orthogonal vertical comb drive and/or parallel plate actuator. Each micro-mirror in the MEMS linear piano micro-mirror array comprises a reflective body/mirror layer, a ground/hinge layer and a hot electrode/substrate layer. To increase the amount of surface area available for the hot and ground electrodes, the dimensions of the ground/hinge layer are extended longitudinally or laterally across the air gap between reflective layers to beneath the adjacent reflective layer. Ideally, diffraction patterns are formed on the surface of the ground/hinge layer to prevent stray light from reflecting back into the system.
    Type: Grant
    Filed: January 26, 2012
    Date of Patent: November 11, 2014
    Assignee: JDS Uniphase Corporation
    Inventors: Abdul Jaleel K. Moidu, John Michael Miller
  • Publication number: 20140055695
    Abstract: A sub-wavelength grating is placed inside a liquid crystal variable optical retarder to reduce polarization dependence of the optical retardation generated by the variable optical retarder. A small thickness of the sub-wavelength grating, as compared to a conventional waveplate, reduces the driving voltage penalty due to the in-cell placement of the sub-wavelength grating.
    Type: Application
    Filed: August 8, 2013
    Publication date: February 27, 2014
    Inventors: John Michael Miller, Gonzalo Wills
  • Publication number: 20130194654
    Abstract: A multi-layer hidden hinge and actuator design for high fill factor biaxial MEMS mirror array for wavelength selective switches (WSS) including a coarsely aligned orthogonal vertical comb drive and/or parallel plate actuator. Each micro-mirror in the MEMS linear piano micro-mirror array comprises a reflective body/mirror layer, a ground/hinge layer and a hot electrode/substrate layer. To increase the amount of surface area available for the hot and ground electrodes, the dimensions of the ground/hinge layer are extended longitudinally or laterally across the air gap between reflective layers to beneath the adjacent reflective layer. Ideally, diffraction patterns are formed on the surface of the ground/hinge layer to prevent stray light from reflecting back into the system.
    Type: Application
    Filed: January 26, 2012
    Publication date: August 1, 2013
    Inventors: Abdul Jaleel K. MOIDU, John Michael Miller
  • Publication number: 20130176621
    Abstract: A diffractive MEMS device has an in-plane binary reflective diffraction pattern formed in an outer surface of a tiltable platform. The binary reflective diffraction pattern includes rectangular or trapezoidal ridges and valleys, or grooves, of a same depth. The binary reflective diffractive pattern has a high diffraction efficiency even though the surfaces of the “grooves” or “ridges” are not perpendicular to the incoming optical beam. The diffractive pattern is supported by a pair of torsional hinges and is tiltable by an electrostatic actuator. The electrostatic actuator can include at least one side electrode for linearization of dependence of tilt angle on the voltage applied to the actuator.
    Type: Application
    Filed: December 20, 2012
    Publication date: July 11, 2013
    Applicant: JDS Uniphase Corporation
    Inventors: John Michael Miller, Wenlin JIN