Patents Assigned to Lumentum Operations LLC
  • Wavelength locker using multiple feedback curves to wavelength lock a beam
    Patent number: 10461493
    Abstract: A device may include a first photodetector to generate a first current based on an optical power of an optical beam. The device may include a beam splitter to split a portion of the optical beam into a first beam and a second beam. The device may include a wavelength filter to filter the first beam and the second beam. The wavelength filter may filter the second beam differently than the first beam based on a difference between an optical path length of the first beam and an optical path length of the second beam through the wavelength filter. The device may include second and third photodetectors to respectively receive, after the wavelength filter, the first beam and the second beam and to generate respective second currents.
    Type: Grant
    Filed: August 10, 2018
    Date of Patent: October 29, 2019
    Assignee: Lumentum Operations LLC
    Inventors: Wei Xiong, Michael C. Larson, Paul Colbourne, Sheldon McLaughlin
  • Zoned optical waveplate
    Patent number: 10436947
    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: May 7, 2018
    Date of Patent: October 8, 2019
    Assignee: Lumentum Operations LLC
    Inventors: John Michael Miller, Joel Milgram, Karen Denise Hendrix, Michael O'Leary, Hery Djie, Lu Tian, Paul Colbourne
  • Rotary optical beam generator
    Patent number: 10429584
    Abstract: An optical fiber device may include a unitary core including a primary section and a secondary section, wherein at least a portion of the secondary section is offset from a center of the unitary core, wherein the unitary core twists about an optical axis of the optical fiber device along a length of the optical fiber device, and wherein a refractive index of the primary section is greater than a refractive index of the secondary section; and a cladding surrounding the unitary core.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: October 1, 2019
    Assignee: Lumentum Operations LLC
    Inventors: Martin H. Muendel, James J. Morehead
  • Optical coupler for optical communications transceiver
    Patent number: 10409003
    Abstract: A planar lightwave circuit may include a set of components. The set of components may include an input waveguide to couple to an optical communications transceiver. The set of components may include an output waveguide to couple to the optical communications transceiver. The set of components may include a common port to couple to an optical fiber. The set of components may include a first polarization beam splitter. The set of components may include a second polarization beam splitter. The set of components may include a third polarization beam splitter. The set of components may include a rotator assembly including a Faraday rotator and a quarter-wave plate.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: September 10, 2019
    Assignee: Lumentum Operations LLC
    Inventors: Michael Ayliffe, Zhaoming Li
  • Diffractive MEMS device
    Patent number: 10394015
    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: Grant
    Filed: March 27, 2017
    Date of Patent: August 27, 2019
    Assignee: Lumentum Operations LLC
    Inventors: John Michael Miller, Wenlin Jin
  • Modulator with signal electrode enclosed by ground electrode
    Patent number: 10371968
    Abstract: A modulator may include a substrate. The modulator may include one or more waveguides formed upon or formed in the substrate. A signal electrode may be provided adjacent to at least one of the one or more waveguides and may include a curved outer surface. The modulator may include one or more ground electrodes provided adjacent to the signal electrode. Each ground electrode, of the one or more ground electrodes, may include a respective curved inner surface that is radially spaced from the curved outer surface of the signal electrode. The one or more ground electrodes and the substrate may at least substantially enclose the curved outer surface of the signal electrode.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: August 6, 2019
    Assignee: Lumentum Operations LLC
    Inventors: Gregory J. McBrien, Karl Kissa
  • Emitter array with variable spacing between adjacent emitters
    Patent number: 10355456
    Abstract: In some implementations, a VCSEL array may include a plurality of VCSELs that each operates concurrently and emits light at a same wavelength. A first distance between a first pair of adjacent VCSELs, of the plurality of VCSELs, may be different from a second distance between a second pair of adjacent VCSELs of the plurality of VCSELs. The first pair of adjacent VCSELs may be located closer to a center of the VCSEL array than the second pair of adjacent VCSELs. At least one of temperature non-uniformity or optical power non-uniformity among the plurality of VCSELs may be reduced as compared to another VCSEL array, with a same physical footprint as the VCSEL array, comprising uniformly spaced VCSELs.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: July 16, 2019
    Assignee: Lumentum Operations LLC
    Inventors: Albert Yuen, Ajit Vijay Barve
  • Multi-core silicon waveguide in a mode-converting silicon photonic edge coupler
    Patent number: 10345522
    Abstract: A mode-converting optical coupler may include a secondary waveguide to guide light in one or more secondary optical modes, and a primary waveguide to guide light in one or more primary optical modes, each adiabatically coupled to a secondary optical mode of the secondary waveguide having a secondary mode index. Each primary optical mode of the primary waveguide may have a first primary mode index near a first end and a second primary mode index near a second end. The first primary mode index may be lower than the second primary mode index. The secondary mode index may be between the first primary mode index and the second primary mode index. The primary waveguide may include a plurality of silicon core structures including a central core structure arranged between a first neighboring core structure and a second neighboring core structure.
    Type: Grant
    Filed: June 18, 2018
    Date of Patent: July 9, 2019
    Assignee: Lumentum Operations LLC
    Inventor: Brian Daniel
  • Laser system and method of tuning the output power of the laser system
    Patent number: 10305252
    Abstract: A power control method for a laser system comprising laser diodes arranged in diode banks is provided. Each diode bank comprises at least one of the laser diodes and has a maximum power. The method comprises operating a first diode bank of the diode banks to output a first power; and concurrently operating other of the diode banks to output other powers, at least one of the other powers being different than the first power.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: May 28, 2019
    Assignees: Lumentum Operations LLC, AMADA HOLDINGS COMPANY LTD.
    Inventors: Martin H. Muendel, Justin L. Franke, Joseph J. Alonis, Kaori Usuda, Minoru Ogata
  • Electrode structures for optical modulators
    Patent number: 10295844
    Abstract: A device may include a substrate. The device may include an optical waveguide formed in or on the substrate. The device may include a signal electrode extending along a longitudinal axis. The signal electrode may include a first portion with a proximal end that is proximal to the optical waveguide, to induce a signal from the signal electrode to the optical waveguide. The signal electrode may include a second portion, at least partially attached to or continuous with a distal end of the first portion. The device may include one or more ground electrodes that form an enclosure. The enclosure may enclose the signal electrode with regard to a side of the substrate in a plane perpendicular to the longitudinal axis.
    Type: Grant
    Filed: April 5, 2016
    Date of Patent: May 21, 2019
    Assignee: Lumentum Operations LLC
    Inventors: Karl Kissa, David Glassner
  • Optical modulator
    Patent number: 10295849
    Abstract: An optical modulator may include at least one ground electrode. The optical modulator may include at least one signal electrode parallel to the at least one ground electrode. The optical modulator may include at least one waveguide parallel to the at least one ground electrode and the at least one signal electrode. The optical modulator may include a first substrate disposed underneath the at least one ground electrode and the at least one signal electrode relative to a surface of the optical modulator. The optical modulator may include a second substrate disposed underneath at least a portion of the first substrate relative to the surface of the optical modulator. The optical modulator may include a floating conductor disposed between the first substrate and the second substrate.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: May 21, 2019
    Assignee: Lumentum Operations LLC
    Inventors: Karl Kissa, Siu Kwan Cheung, David M. Shemo, David Glassner, Ed L. Wooten
  • Closed loop quadrature bias control for an IQ phase modulator
    Patent number: 10254570
    Abstract: An electro-optic device may comprise a Mach-Zehnder modulator (MZM) and one or more components. The one or more components may apply a child DC bias with dither to arms of a first branch of the MZM and to arms of a second branch of the MZM, and determine a second harmonic of a first return signal. The one or more components may apply a child DC bias with phase-shifted dither to the arms of the first branch or to the arms of the second branch, and determine a second harmonic of a second return signal. The one or more components may determine, based on the second harmonics, whether the first branch and the second branch are operating at quadrature, and may selectively adjust parent DC biases, applied to the first branch and the second branch, based on whether the first branch and the second branch are operating at quadrature.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: April 9, 2019
    Assignee: Lumentum Operations LLC
    Inventors: Dan Burke, Fredrik Sy
  • Variable emission area design for a vertical-cavity surface-emitting laser array
    Patent number: 10250012
    Abstract: A vertical cavity surface emitting laser (VCSEL) array may include a plurality of VCSELs. A size of an emission area of a first VCSEL, of the plurality of VCSELs, may be different from a size of an emission area of a second VCSEL of the plurality of VCSELs. The first VCSEL may be located closer to a center of the VCSEL array than the second VCSEL. A difference between the size of the emission area of the first VCSEL and the size of the emission area of the second VCSEL may be associated with reducing a difference in operating temperature between the first VCSEL and the second VCSEL, or reducing a difference in optical power output between the first VCSEL and the second VCSEL.
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: April 2, 2019
    Assignee: Lumentum Operations LLC
    Inventors: Ajit Vijay Barve, Eric R. Hegblom
  • Thin film total internal reflection diffraction grating for single polarization or dual polarization
    Patent number: 10241244
    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: Grant
    Filed: July 29, 2016
    Date of Patent: March 26, 2019
    Assignee: Lumentum Operations LLC
    Inventors: John Michael Miller, Gonzalo Wills, Lu Tian, Michael O'Leary
  • Second harmonic generation
    Patent number: 10228607
    Abstract: A second harmonic generator may include a combiner to combine a fundamental optical beam with a residual fundamental optical beam. The second harmonic generator may include a second harmonic crystal, coupled to the combiner, to generate a second harmonic optical beam from the fundamental optical beam and the residual fundamental optical beam. Upon generation of the second harmonic optical beam, the residual fundamental optical beam may exit the second harmonic crystal.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: March 12, 2019
    Assignee: Lumentum Operations LLC
    Inventors: Martin H. Muendel, James J. Morehead
  • Multi-laser package using shared optics
    Patent number: 10211602
    Abstract: An optical device may include a semiconductor laser chip to independently generate four laser beams at different wavelengths. Each laser beam, of the four laser beams, may be directed to a respective optical output of the optical device with a sub-micron level of tolerance of each laser beam relative to the respective optical outputs of the optical device, and each laser beam, of the four laser beams, may be associated with a different optical path from the semiconductor laser chip to the respective optical output of the optical device. The optical device may include a lens to receive each of the four laser beams. The lens may be positioned to direct each laser beam, of the four laser beams, toward the respective optical output of the optical device. The optical device may include an optical isolator to receive each of the four laser beams.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: February 19, 2019
    Assignee: Lumentum Operations LLC
    Inventors: Michael Ayliffe, Yuliya Akulova, Claude Gamache
  • Vertical-cavity surface-emitting laser thin wafer bowing control
    Patent number: 10205303
    Abstract: A vertical-cavity surface-emitting laser (VCSEL) wafer, may include: a substrate layer, epitaxial layers grown on the substrate layer, and a strain compensating layer to control bowing of the VCSEL wafer after thinning of the VCSEL wafer. The strain compensating layer may be arranged on an epitaxial side of the substrate layer. The strain compensating layer may control bowing of the thinned VCSEL wafer by at least partially compensating for compressive strain in the epitaxial layers of the VCSEL wafer.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: February 12, 2019
    Assignee: Lumentum Operations LLC
    Inventor: Eric R. Hegblom
  • Sliding thermal contact for pluggable optic modules
    Patent number: 10197754
    Abstract: Present thermal solutions to conduct heat from pluggable optical modules into heat sinks use a metal heat sink attached with a spring clip. The interface between the pluggable module and the heat sink is simple metal-on-metal contact, which is inherently a poor thermal interface and limits heat dissipation from the optical module. Heat dissipation from pluggable optical modules is enhanced by the application of thermally conductive fibers, such as an advanced carbon nanotube velvet. The solution improves heat dissipation while preserving the removable nature of the optical modules.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: February 5, 2019
    Assignee: Lumentum Operations LLC
    Inventors: David Moore, Dean Flockton
  • Electrically isolating adjacent vertical-emitting devices
    Patent number: 10199794
    Abstract: A vertical cavity surface emitting laser (VCSEL) array may comprise a doped substrate layer. The VCSEL array may comprise a plurality of VCSELs on the doped substrate layer. The VCSEL array may comprise a buffer structure between the doped substrate layer and the plurality of VCSELs. The buffer structure, or a combination of the buffer structure and a layer of the plurality of VCSELs, may provide electrical isolation from the plurality of VCSELs to the doped substrate layer. The VCSEL array may comprise an isolation structure between adjacent VCSELs of the plurality of VCSELs. The isolation structure may provide electrical isolation between a first VCSEL, of the adjacent VCSELs, and a second VCSEL of the adjacent VCSELs. The first VCSEL and the second VCSEL may be different VCSELs.
    Type: Grant
    Filed: February 9, 2018
    Date of Patent: February 5, 2019
    Assignee: Lumentum Operations LLC
    Inventor: Albert Yuen
  • Controlling uniformity of lateral oxidation of wafer surface features using a vertical stack of horizontal wafers
    Patent number: 10170889
    Abstract: In some implementations, a method may include introducing oxygen into a furnace that contains a vertical stack of horizontal wafers. The oxygen may enter the furnace at a location above the vertical stack. A patterned wafer, included in the vertical stack, may include one or more surface features, and a surface feature, of the one or more surface features, may include one or more layers capable of being oxidize. The method may include causing lateral oxidation of at least one layer, of the one or more layers, based on introducing the oxygen into the furnace.
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: January 1, 2019
    Assignee: Lumentum Operations LLC
    Inventor: Albert Yuen