Patents Assigned to Lumentum Operations LLC
  • Patent number: 11456575
    Abstract: A vertical-cavity surface-emitting laser (VCSEL) may include a substrate and a set of epitaxial layers on the substrate. The set of epitaxial layers may include a first mirror and a second mirror, an active region between the first mirror and the second mirror, and an oxidation layer to provide optical and electrical confinement in the VCSEL. The oxidation layer may be near the first mirror. The set of epitaxial layers may include an oxide lens to control a characteristic of an output beam emitted by the VCSEL. The oxide lens may be separate from the oxidation layer, and may be a lens that is separate from the first mirror and from the second mirror.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: September 27, 2022
    Assignee: Lumentum Operations LLC
    Inventors: Albert Yuen, Eric R. Hegblom
  • Patent number: 11451009
    Abstract: A vertical cavity surface emitting laser (VCSEL) may include a top contact, wherein the top contact is associated with a particular shape, and wherein the particular shape is a toothed shape with a particular quantity of teeth. The VCSEL may include at least one implanted region. The VCSEL may include at least one top contact segment.
    Type: Grant
    Filed: December 23, 2019
    Date of Patent: September 20, 2022
    Assignee: Lumentum Operations LLC
    Inventors: Pengfei Qiao, Chien-Yao Lu, Albert Yuen
  • Patent number: 11448829
    Abstract: An M×N wavelength selective switch (WSS), may comprise a common port fiber array unit (FAU) configured to emit optical beams with a lateral offset and a beam steering device configured to direct optical beams with an angular offset to add/drop port optical fibers of an add/drop port FAU. The common port FAU may comprise a first set of common port optical fibers arranged in a first column of the common port FAU and a second set of common port optical fibers arranged in a second column of the common port FAU. The second column of the common port FAU may be laterally offset from the first column of the common port FAU. The beam steering device may be configured to selectively direct, in two dimensions, the optical beams with the angular offset to the add/drop port optical fibers.
    Type: Grant
    Filed: August 20, 2020
    Date of Patent: September 20, 2022
    Assignee: Lumentum Operations LLC
    Inventor: Sheldon McLaughlin
  • Patent number: 11451013
    Abstract: A wide-angle illuminator module including a rigid support structure having a plurality of angled faces, a flexible circuit including one or more VCSEL arrays, each VCSEL array positioned over a face among the plurality of angled faces, each VCSEL array including a plurality of integrated microlenses with one microlens positioned over each VCSEL in the VCSEL array, and a driver circuit for providing electrical pulses to each VCSEL array, wherein the plurality of VCSEL arrays address illumination zones in a combined field of illumination. The support structure may also be a heatsink. The flexible circuit may be a single flexible circuit configured to be placed over the support structure or a plurality of flexible circuits, each including one VCSEL array.
    Type: Grant
    Filed: August 3, 2021
    Date of Patent: September 20, 2022
    Assignee: Lumentum Operations LLC
    Inventors: Preethi Dacha, David Podva, Mial E. Warren
  • Patent number: 11451012
    Abstract: A vertical cavity surface emitting laser (VCSEL) array may comprise a first subset of VCSELs of a plurality of VCSELs, and a second subset of VCSELs of the plurality of VCSELs. One or more first beams to be emitted by the first subset of VCSELs, when the VCSEL array is powered, and one or more second beams to be emitted by the second subset of VCSELs, when the VCSEL array is powered, may have different patterns of areas of energy intensity. The different patterns of areas of energy intensity may include respective areas of high energy intensity and respective areas of low energy intensity.
    Type: Grant
    Filed: November 11, 2020
    Date of Patent: September 20, 2022
    Assignee: Lumentum Operations LLC
    Inventors: Xiaohua Lou, Delai Zhou, Hery Djie
  • Patent number: 11437784
    Abstract: A surface emitting laser may include an isolation layer including a first center portion and a first plurality of outer portions extending from the first center portion, and a metal layer including a second center portion and a second plurality of outer portions extending from the second center portion. The metal layer may be formed on the isolation layer such that a first outer portion, of the second plurality of outer portions, is formed over one of the first plurality of outer portions. The surface emitting laser may include a passivation layer including a plurality of openings. An opening may be formed over the first outer portion. The surface emitting laser may include a plurality of oxidation trenches. An oxidation trench may be positioned at least partially between the first outer portion and a second outer portion of the second plurality of outer portions.
    Type: Grant
    Filed: February 21, 2020
    Date of Patent: September 6, 2022
    Assignee: Lumentum Operations LLC
    Inventors: Ajit Vijay Barve, Albert Yuen
  • Patent number: 11415751
    Abstract: An optical fiber includes a core configured to transmit laser light and a cladding that surrounds the core. In some implementations, an outer surface region of the cladding is tapered or comprises a plurality of notches. The outer surface region of the cladding is configured to cause an aiming beam that falls incident upon the outer surface region of the cladding at a first incidence angle to fall incident upon an outer surface region of the core at a second incidence angle to allow the aiming beam to couple into the core.
    Type: Grant
    Filed: February 4, 2021
    Date of Patent: August 16, 2022
    Assignee: Lumentum Operations LLC
    Inventors: Jeff Gregg, Xiang Peng, Richard D. Faulhaber, Patrick Gregg
  • Patent number: 11417999
    Abstract: An optical assembly provides dispersion control, modelocking, spectral filtering, and/or the like in a laser cavity. For example, the optical assembly may comprise a diffraction grating pair arranged to temporally and spatially disperse a beam on a forward pass through the optical assembly, a reflective device at an end of the optical assembly, and a focusing optic arranged to create a beam waist at the reflective device. The beam waist created at the reflective device may cause the beam to be inverted on a reverse pass through the optical assembly, and a temporal dispersion and a spatial dispersion of the beam may be doubled on the reverse pass through the optical assembly to form a temporally and spatially dispersed output from the optical assembly.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: August 16, 2022
    Assignee: Lumentum Operations LLC
    Inventors: Simonette Pierrot, Martin H. Muendel
  • Patent number: 11405114
    Abstract: An optical receiver includes an optical amplifier that is optically connected to a local oscillator (LO) and a plurality of optical hybrid mixers of the optical receiver and that is electrically connected to a controller. The optical amplifier is configured to receive an optical LO signal from the LO, receive a voltage value associated with an optical input signal of the optical receiver, control a power of the optical LO signal based on the voltage value, and provide, after adjusting the power of the optical LO signal, the optical LO signal to the plurality of optical hybrid mixers. The controller, is configured to determine the voltage value associated with the optical input signal and cause the voltage value to be provided to the optical amplifier.
    Type: Grant
    Filed: March 11, 2021
    Date of Patent: August 2, 2022
    Assignee: Lumentum Operations LLC
    Inventor: Stefano Bottacchi
  • Patent number: 11405105
    Abstract: High power, high speed VCSEL arrays are employed in unique configurations of arrays and sub-arrays. Placement of a VCSEL array behind a lens allows spatial separation and directivity. Diffusion may be employed to increase alignment tolerance. Intensity modulation may be performed by operating groups of VCSEL emitters at maximum bias. Optical communications networks with high bandwidth may employ angular, spatial, and/or wavelength multiplexing. A variety of network topologies and bandwidths suitable for the data center may be implemented. Eye safe networks may employ VCSEL emitters may be paired with optical elements to reduce optical power density to eye safe levels.
    Type: Grant
    Filed: February 24, 2021
    Date of Patent: August 2, 2022
    Assignee: Lumentum Operations LLC
    Inventors: John R. Joseph, Kevin L. Lear, David Abell
  • Patent number: 11398716
    Abstract: An optical device may include an array of vertical-cavity surface-emitting lasers (VCSELs) having a design wavelength, each VCSEL having an emission area. The optical device may include a first metal layer, substantially covering the array, a second metal layer substantially covering the first metal layer, and an electrical isolation layer, between the first metal layer and the second metal layer, that includes vias for electrically connecting portions of the first metal layer and portions of the second metal layer. The optical device may include a dielectric disposed over the emission area of each VCSEL. A variation in a thickness of the dielectric across at least approximately 90% of an area of the dielectric may be less than approximately 2% of the design wavelength. A depth of a well around the emission area may be equal to at least approximately 10% of a width of the emission area.
    Type: Grant
    Filed: November 2, 2020
    Date of Patent: July 26, 2022
    Assignee: Lumentum Operations LLC
    Inventor: Eric R. Hegblom
  • Patent number: 11398446
    Abstract: A die attachment material may include an ultra-violet (UV) curable resin and silver particles to attach a chip to a submount, where the silver particles are positioned within the UV curable resin. A method may include heating the die attachment material to obtain the UV curable resin on sintered silver particles, where at least a portion of the die attachment material is position between a chip and a submount. The method may further include irradiating, with UV light, the UV curable resin to obtain a polymer on the sintered silver particles. The polymer may form a layer on the sintered silver particles.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: July 26, 2022
    Assignee: Lumentum Operations LLC
    Inventors: Zhengwei Shi, Lijun Zhu, Jihua Du
  • Patent number: 11391899
    Abstract: A pluggable optical module may include a substrate. The pluggable optical module may include a compressible sliding thermal interface disposed on the substrate to contact a riding heatsink. The compressible sliding thermal interface material may be compressed to fill interstices between a first surface of the substrate and a second surface of the riding heatsink. The compressible sliding thermal interface may protrude from the first surface of the substrate such that insertion of the pluggable optical module into a cage compresses the compressible sliding thermal interface to achieve a threshold thermal boundary resistance.
    Type: Grant
    Filed: February 4, 2019
    Date of Patent: July 19, 2022
    Assignee: Lumentum Operations LLC
    Inventors: Roozbeh Ahmadi, Thomas Haslam, Shane H. Woodside
  • Patent number: 11378825
    Abstract: An electrical-optical modulator may include one or more optical waveguides to propagate one or more optical signals in a direction of propagation. An optical waveguide of the one or more optical waveguides may include a time delay section, a first modulation section preceding the time delay section in the direction of propagation, and a second modulation section following the time delay section in the direction of propagation. The first modulation section and the second modulation section may be configured to be associated with opposite modulation polarities, and the time delay section may be configured to delay a phase of the one more optical signals relative to the first modulation section. The electrical-optical modulator may include one or more signal electrodes to propagate one or more signals in the direction of propagation in order to modulate the one or more optical signals through electrical-optical interaction.
    Type: Grant
    Filed: March 31, 2020
    Date of Patent: July 5, 2022
    Assignee: Lumentum Operations LLC
    Inventors: Karl Kissa, David Glassner, Stephen Jones, Robert Griffin, John M. Heaton
  • Patent number: 11378826
    Abstract: An electrical-optical modulator may include a first section configured for a first electrical-optical interaction between one or more optical waveguides and one or more signal electrodes. The electrical-optical modulator may include a second section configured to increase or decrease a relative velocity of signals of the one or more signal electrodes to optical signals of the one or more optical waveguides relative to the first section. The electrical-optical modulator may include a third section configured for a second electrical-optical interaction between the one or more optical waveguides and the one or more signal electrodes according to an opposite modulation polarity relative to the first section.
    Type: Grant
    Filed: March 31, 2020
    Date of Patent: July 5, 2022
    Assignee: Lumentum Operations LLC
    Inventors: Karl Kissa, David Glassner, Stephen Jones, Robert Griffin, John M. Heaton
  • Patent number: 11360269
    Abstract: An optical fiber device may include an optical waveguide to guide a laser output from a first end of the optical waveguide to a second end of the optical waveguide. The optical fiber device may include a fiber telescope optically coupled to the second end of the optical waveguide to modify the laser output. The fiber telescope may include a first graded-index optical element, a first facet of the first graded-index optical element being fused to the second end of the optical waveguide; and a second graded-index optical element, a first facet of the second graded-index optical element being fused to a second facet of the first graded-index optical element.
    Type: Grant
    Filed: September 30, 2019
    Date of Patent: June 14, 2022
    Assignee: Lumentum Operations LLC
    Inventors: Richard D. Faulhaber, Martin H. Muendel
  • Patent number: 11349274
    Abstract: An amplifier assembly may include a first heat sink plate that includes a first channel, a second heat sink plate that includes a second channel, and an amplifier rod disposed in the first channel and the second channel. The second heat sink plate may be connected with the first heat sink plate such that the first channel and the second channel align. The amplifier rod may be connected to the first heat sink plate and the second heat sink plate by a non-eutectic solder.
    Type: Grant
    Filed: September 30, 2019
    Date of Patent: May 31, 2022
    Assignee: Lumentum Operations LLC
    Inventors: Christoffer Stroemberg, Susan Fung, Derek A. Tucker
  • Patent number: 11347069
    Abstract: An optical fiber device may include a core including a primary section and a secondary section. The secondary section may include at least one insert element inserted within the primary section at an off-center location with respect to a center of the primary section. The secondary section may twist about an axis of the optical fiber device along a length of the optical fiber device. A rate of twist at which the secondary section twists about the axis may increase from a first end of the optical fiber device toward a second end of the optical fiber device. The secondary section being twisted about the axis may cause an optical beam, launched at the first end of the optical fiber device, to be at least partially converted to a rotary optical beam at the second end of the optical fiber device.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: May 31, 2022
    Assignee: Lumentum Operations LLC
    Inventors: Martin H. Muendel, Richard D. Faulhaber, James J. Morehead, Vincent Petit, Patrick Gregg
  • Patent number: 11349277
    Abstract: Systems, methods, and devices are described for in-situ testing of vertical-cavity surface-emitting lasers (VCSELs), VCSEL arrays or laser diodes (each a laser). Testing may comprise bias voltage measurements of one or more lasers. Embodiments may comprise one of a laser, a driver circuit providing a bipolar drive to the laser, and a sensing circuit to measure and/or monitor damage or degradation of the laser. The bipolar drive may comprise a pulsed forward bias output configured to produce a light output during an on-time of the laser, and a pulsed reverse bias output during an off-time of the pulsed forward bias output. The pulsed outputs may comprise a variable, chirped frequency. One or more of a reverse leakage current, and a junction temperature may be measured to monitor a state of health of the laser.
    Type: Grant
    Filed: November 11, 2019
    Date of Patent: May 31, 2022
    Assignee: Lumentum Operations LLC
    Inventor: Kevin M. Kupcho
  • Patent number: 11340467
    Abstract: An optical fiber may include a first core, a second core, and a cladding surrounding the first core and the second core. The second core may be at an off-center location with respect to a center of the optical fiber, or the second core may include an azimuthally nonuniform section at the off-center location. The second core may twist about an axis of the optical fiber along a length of the optical fiber, and the second core being twisted about the axis may cause an optical beam, launched into the second core at a first end of the optical fiber, to be at least partially converted to a rotary optical beam at a second end of the optical fiber.
    Type: Grant
    Filed: April 28, 2020
    Date of Patent: May 24, 2022
    Assignee: Lumentum Operations LLC
    Inventors: Patrick Gregg, Richard D. Faulhaber, Martin H. Muendel, Vincent Petit, James J. Morehead