Patents Assigned to Lumentum Operations LLC
  • Tapered non-concentric core fibers
    Patent number: 10690855
    Abstract: A device may splice, at a target splice point, a first end of a twisted fiber having a non-concentric core to an input end of a target fiber having a concentric core to form a spliced fiber wherein the concentric core of the target fiber and the non-concentric core of the twisted fiber have a particular offset at the target splice point. The device may taper at least a portion of the twisted fiber to form a tapered region of the spliced fiber and such that the particular offset at the target splice point corresponds to a pre-configured core offset wherein the target splice point is within the tapered region of the spliced fiber.
    Type: Grant
    Filed: September 17, 2019
    Date of Patent: June 23, 2020
    Assignee: Lumentum Operations LLC
    Inventors: Patrick Gregg, Richard D. Faulhaber, James J. Morehead, Vincent Petit, Martin H. Muendel
  • Rotary optical beam generator
    Patent number: 10690854
    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: September 25, 2019
    Date of Patent: June 23, 2020
    Assignee: Lumentum Operations LLC
    Inventors: Martin H. Muendel, James J. Morehead
  • Optimization of heater shape for integrated heater for optical benches
    Patent number: 10684441
    Abstract: A method may include identifying, by a device, a set of components of an optical device. The method may include determining, by the device, a set of design criteria based on the set of components of the optical device. The method may include identifying, by the device, an initial heater configuration based on the set of design criteria. The method may include determining, by the device, a set of optimization parameters for determining a target heater configuration based on the set of design criteria. The method may include performing, by the device and based on the set of optimization parameters, an optimization procedure to alter the initial heater configuration to determine the target heater configuration. The method may include providing, by the device, information identifying the target heater configuration based on performing the optimization procedure.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: June 16, 2020
    Assignee: Lumentum Operations LLC
    Inventors: Roozbeh Ahmadi, Doug Cross, Nenad Duricic, Martin Matthews
  • Multiple waveguide alignment
    Patent number: 10678004
    Abstract: According to some possible implementations, an optical device may include a plurality of photodiodes, wherein alignment of the plurality of photodiodes with a fixed separation to a plurality of multi-mode waveguides disposed on an optical waveguide chip and with the same fixed separation is optimized by alignment of at least one of the plurality of photodiodes to at least one single-mode waveguide and translation of the optical waveguide chip relative to the plurality of photodiodes by a fixed offset of the at least one single-mode waveguide relative to the plurality of multi-mode waveguides.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: June 9, 2020
    Assignee: Lumentum Operations LLC
    Inventors: Tedros Tsegaye, Barthelemy Fondeur, Dilu He, Kejia Li, Brad Levin
  • Integrated wavelength monitor
    Patent number: 10670803
    Abstract: A silicon photonics module may include a waveguide for receiving and transmitting an optical beam. The silicon photonics module may include a tap connected to the waveguide to allow measurement of an optical power of the optical beam. The silicon photonics module may include one or more splitters connected to the waveguide to tap a portion of the optical beam from the waveguide and to split the portion of the optical beam into a first part and a second part. The silicon photonics module may include a first Mach-Zehnder interferometer (MZI) to filter the first part to allow measurement of an optical power of the filtered first part. The silicon photonics module may include a second MZI to filter the second part to allow measurement of an optical power of the filtered second part.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: June 2, 2020
    Assignee: Lumentum Operations LLC
    Inventor: Brian Daniel
  • Reconfigurable emitter array
    Patent number: 10666020
    Abstract: An emitter array may comprise a plurality of vertical-emitting devices. The plurality of vertical-emitting devices may be in a two-dimensional pattern of vertical-emitting devices. The emitter array may further comprise a plurality of electrical contacts on a surface of the emitter array. Each of the plurality of electrical contacts may be co-located with and electrically connected to a corresponding vertical-emitting device of the plurality of vertical-emitting devices. The plurality of electrical contacts may provide mechanical support over the plurality of vertical-emitting devices. The plurality of electrical contacts may extend to approximately a same height. A subset of the plurality of vertical-emitting devices may be powered via a corresponding subset of the plurality of electrical contacts.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: May 26, 2020
    Assignee: Lumentum Operations LLC
    Inventor: Albert Yuen
  • Optical coupling structure for coupling an integrated silicon germanium photodetector/transimpedance amplifier and an integrated optics circuit
    Patent number: 10663669
    Abstract: An optical device may include an optical coupling structure to couple a silicon-germanium photodetector to an integrated optics circuit. The optical coupling structure may comprise a silicon waveguide. The silicon waveguide may be tapered such that a thickness of the silicon waveguide at a first end of the optical coupling structure is smaller than a thickness of the silicon waveguide at a second end of the optical coupling structure, and may be tapered such that a width of the silicon waveguide at the first end is smaller than a width of the silicon waveguide at the second end. The optical coupling structure may include a silicon-nitride waveguide that covers the silicon waveguide, and is tapered such that a width of the silicon-nitride waveguide at the first end is smaller than a width of the silicon-nitride waveguide at the second end. The optical coupling structure may include a silica waveguide.
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: May 26, 2020
    Assignee: Lumentum Operations LLC
    Inventors: Lance Thompson, Shibnath Pathak
  • Rotary optical beam generator
    Patent number: 10656334
    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 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: June 28, 2019
    Date of Patent: May 19, 2020
    Assignee: Lumentum Operations LLC
    Inventors: Martin H. Muendel, James J. Morehead, Vincent Petit, Richard D. Faulhaber
  • Dynamic range for a heterodyne optical channel monitor
    Patent number: 10637581
    Abstract: An optical channel monitor (OCM) may include a modulator to provide a modulation signal and a local oscillator (LO) to provide a modulated LO signal. The modulated LO signal may be created by modulating an LO signal based on the modulation signal. The OCM may include a mixer to generate a pair of mixed optical signals. The pair of mixed optical signals may be generated based on mixing the modulated LO signal and an input optical signal. The OCM may include an optical detector to provide, based on the pair of mixed optical signals, a first electrical signal corresponding to a coherent mixture of the input optical signal and the modulated LO signal. The OCM may include a synchronous demodulator to provide, based on the first electrical signal and the modulation signal, a second electrical signal representative of the optical power spectrum of the input optical signal.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: April 28, 2020
    Assignee: Lumentum Operations LLC
    Inventors: Shane H. Woodside, Jiamin Zheng
  • Electrically isolating adjacent vertical-emitting devices
    Patent number: 10630048
    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 4, 2019
    Date of Patent: April 21, 2020
    Assignee: Lumentum Operations LLC
    Inventor: Albert Yuen
  • Electro-absorption bias circuit for electro-absorption modulators
    Patent number: 10615877
    Abstract: An electro-absorption bias circuit may include a temperature sensor. The electro-absorption bias circuit may include a controller to provide a temperature-dependent control signal based on data received from the temperature sensor. The electro-absorption bias circuit may include a power supply to provide an output voltage based on the temperature-dependent control signal from the controller. The electro-absorption bias circuit may include an electro-absorption driving circuit to output a bias voltage applied to the output voltage provided by the power supply.
    Type: Grant
    Filed: May 23, 2018
    Date of Patent: April 7, 2020
    Assignee: Lumentum Operations LLC
    Inventors: Ricardo Saad, Linda Liu, Yu-Ting Hsueh, Goutham Kumar
  • Aiming beam side-coupler
    Patent number: 10603744
    Abstract: A method of manufacturing a side-coupling structure, associated with coupling an aiming beam from an aiming beam fiber into a laser beam fiber, may include removing a coating from a section of the laser beam fiber and removing a coating from a section of the aiming beam fiber. The method may further include bringing the section of the aiming beam fiber in physical contact with the section of the laser beam fiber in order to create the side-coupling structure. The method may further include recoating the section of the laser beam fiber and the section of the aiming beam fiber in order to coat the side-coupling structure.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: March 31, 2020
    Assignee: Lumentum Operations LLC
    Inventors: Changgeng Ye, Hongbo Yu, Martin H. Muendel
  • Thick layer for liquid crystal on silicon assembly
    Patent number: 10585331
    Abstract: A liquid crystal on substrate (LCOS) assembly may include an LCOS carrier. The LCOS assembly may include at least one thick layer on the LCOS carrier and associated with a threshold thickness. The threshold thickness may be at least 5 micrometers. The LCOS assembly may include a switching engine on the at least one thick layer. The switching engine may include an LCOS die and an LCOS cover glass to enclose an LCOS liquid. The LCOS assembly may be associated with a thermal sensitivity of less than 0.5 millidegrees of curvature per degree Celsius for a particular temperature range.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: March 10, 2020
    Assignee: Lumentum Operations LLC
    Inventors: Roozbeh Ahmadi, Wenlin Jin
  • Compact emitter design for a vertical-cavity surface-emitting laser
    Patent number: 10574031
    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: June 30, 2017
    Date of Patent: February 25, 2020
    Assignee: Lumentum Operations LLC
    Inventors: Ajit Vijay Barve, Albert Yuen
  • Calibration for an optical device
    Patent number: 10545390
    Abstract: A device may include a plurality of interferometers. The plurality of interferometers may include a parent interferometer, a first child interferometer coupled to a first branch of the parent interferometer, and a second child interferometer coupled to a second branch of the parent interferometer. At least one of the plurality of interferometers may be calibrated by maintaining collinearity of an output of the first branch and the second branch and using perturbation signals.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: January 28, 2020
    Assignee: Lumentum Operations LLC
    Inventor: Amit Mizrahi
  • High bandwidth RF or microwave interconnects for optical modulators
    Patent number: 10502987
    Abstract: A radio frequency (RF) interconnect for an optical modulator may comprise a circuit board to route a set of RF signals from a corresponding set of RF feeds to a substrate interface on a surface of a substrate of the optical modulator. The circuit board may be positioned along the surface of the substrate of the optical modulator. The circuit board may include a set of traces. A trace, of the set of traces, may be connected to a corresponding RF feed, of the set of RF feeds, at a height different than a height of the surface of the substrate of the optical modulator. The trace may be connected to the substrate interface.
    Type: Grant
    Filed: April 5, 2016
    Date of Patent: December 10, 2019
    Assignee: Lumentum Operations LLC
    Inventors: Siu Kwan Cheung, Glen Drake, Karl Kissa
  • Bidirectional long cavity semiconductor laser for improved power and efficiency
    Patent number: 10490967
    Abstract: The invention relates to bi-directional long-cavity semiconductor lasers for high power applications having two AR coated facets (2AR) to provide an un-folded cavity with enhanced output power. The lasers exhibit more uniform photon and carrier density distributions along the cavity than conventional uni-directional high-power lasers, enabling longer lasers with greater output power and lasing efficiency due to reduced longitudinal hole burning. Optical sources are further provided wherein radiation from both facets of several 2AR lasers that are disposed at vertically offset levels is combined into a single composite beam.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: November 26, 2019
    Assignee: Lumentum Operations LLC
    Inventors: Abdullah Demir, Matthew Glenn Peters
  • High density optical fiber feedthrough
    Patent number: 10481344
    Abstract: A method may include aligning a portion of each of a plurality of optical ribbons in a particular orientation or sequence using a set of alignment apparatus. The method may include stripping the portion of each of the plurality of optical ribbons to expose a cladding of each fiber of the plurality of optical ribbons using a set of stripping apparatus. The method may include hermetically sealing a tube around the portion of each of the plurality of optical ribbons using a set of sealing apparatus. The method may produce a hermetic optical fiber feedthrough.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: November 19, 2019
    Assignee: Lumentum Operations LLC
    Inventors: Steven Harold Moffat, Stephane McDermott, Michael Dagenais, Constantin Giurgea, Vladimir Torgashev, Nebojsa Gacic
  • Reflective LC devices including thin film metal grating
    Patent number: 10473839
    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 24, 2017
    Date of Patent: November 12, 2019
    Assignee: Lumentum Operations LLC
    Inventors: Keith Anderson, John Michael Miller, Hery Djie, Lu Tian
  • Colorless, directionless, contentionless optical network using MXN wavelength selective switches
    Patent number: 10476624
    Abstract: A first configuration of an optical node may include a set of degrees, each including an inbound wavelength selective switch (WSS) and an outbound WSS. The first configuration may include a first degree expansion including a first inbound expansion WSS and a first outbound expansion WSS. An expansion input of the first inbound expansion WSS may connect to an expansion output of a second outbound expansion WSS included in a second degree expansion of a second configuration of the optical node. An expansion output of the first outbound expansion WSS may connect to an expansion input of a second inbound expansion WSS included in the second degree expansion of the second configuration. A signal input to an inbound WSS of a given one of the set of degrees may be routed, via the first degree expansion and the second degree expansion, to any drop port included in the second configuration.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: November 12, 2019
    Assignee: Lumentum Operations LLC
    Inventors: Paul Colbourne, Brian Smith