Patents Assigned to Lumentum Operations LLC
  • Grating structure for surface-emitting laser
    Patent number: 10826274
    Abstract: A vertical-cavity surface-emitting laser (VCSEL) may include at least one layer forming a grating structure with a selected period, depth, and fill factor, wherein the period, the depth, and the fill factor of the grating structure are configured to achieve greater than a threshold level of efficiency for the VCSEL, less than a threshold current increase caused by power loss from higher order diffraction associated with the grating structure, and greater than a threshold polarization selectivity at an emission wavelength of the VCSEL.
    Type: Grant
    Filed: February 6, 2019
    Date of Patent: November 3, 2020
    Assignee: Lumentum Operations LLC
    Inventors: Pengfei Qiao, Chien-Yao Lu
  • Vertical-cavity surface-emitting laser array with multiple metal layers for addressing different groups of emitters
    Patent number: 10826278
    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: September 14, 2018
    Date of Patent: November 3, 2020
    Assignee: Lumentum Operations LLC
    Inventor: Eric R. Hegblom
  • Testing device for bottom-emitting or bottom-detecting optical devices
    Patent number: 10801969
    Abstract: A testing device for bottom-emitting or bottom-detecting optical devices may comprise a support structure to support a lower transparent chuck and an upper transparent chuck that includes a set of vacuum holes. In some implementations, a vacuum may be formed in a space between the lower transparent chuck and the upper transparent chuck when a vacuum pump is applied to an opening in a sidewall of the support structure. For example, the vacuum may create suction to cause an optical device under test to be mechanically secured on a top surface of the upper transparent chuck. The testing device may further comprise a photodetector disposed below the lower transparent chuck to detect light that travels through the upper transparent chuck and the lower transparent chuck when one or more probes complete an electrical path that causes the optical device under test to emit the light.
    Type: Grant
    Filed: November 25, 2019
    Date of Patent: October 13, 2020
    Assignee: Lumentum Operations LLC
    Inventor: Albert Yuen
  • Thin film total internal reflection diffraction grating for single polarization or dual polarization
    Patent number: 10802183
    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: February 28, 2019
    Date of Patent: October 13, 2020
    Assignee: Lumentum Operations LLC
    Inventors: John Michael Miller, Gonzalo Wills, Lu Tian, Michael O'Leary
  • Cladding light stripper
    Patent number: 10802209
    Abstract: A cladding light stripper may include a double-clad optical fiber having a core for guiding signal light, an inner cladding surrounding the core, and an outer cladding surrounding the inner cladding. The optical fiber may include a stripped portion forming an exposed section. The exposed section may include a plurality of spirally-arranged transversal notches disposed along the optical fiber to enable light to escape the inner cladding upon impinging on the plurality of notches. A circumferential segment of the optical fiber may include a single notch of the plurality of notches. Each of the plurality of notches may have a depth of only a partial distance to the core.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: October 13, 2020
    Assignee: Lumentum Operations LLC
    Inventors: Zong Kwei Wu, Kwang Chong, Martin H. Muendel
  • Multi-level diffractive optical element thin film coating
    Patent number: 10802185
    Abstract: A transmissive optical element may include a substrate. The transmissive optical element may include a first anti-reflectance structure for a particular wavelength range formed on the substrate. The transmissive optical element may include a second anti-reflectance structure for the particular wavelength range formed on the first anti-reflectance structure. The transmissive optical element may include a third anti-reflectance structure for the particular wavelength range formed on the second anti-reflectance structure. The transmissive optical element may include at least one layer disposed between the first anti-reflectance structure and the second anti-reflectance structure or between the second anti-reflectance structure and the third anti-reflectance structure.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: October 13, 2020
    Assignee: Lumentum Operations LLC
    Inventors: John Michael Miller, Gonzalo Wills
  • Optical receiver with photodiode disposed directly on a planar lightwave circuit
    Patent number: 10795080
    Abstract: An optical receiver may include a planar lightwave circuit with an optical path and a tapered reflection surface to direct an optical beam toward a top surface of the planar lightwave circuit. The optical receiver may include a photodiode disposed onto the top surface of the planar lightwave circuit such that a receive portion of the photodiode is aligned to the optical path, wherein a gap between the photodiode and the planar lightwave circuit is less than 5 microns.
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: October 6, 2020
    Assignee: Lumentum Operations LLC
    Inventors: Yujian Bao, Zhaoming Li
  • Bias control structure for avalanche photodiodes
    Patent number: 10797193
    Abstract: According to some implementations, an avalanche photodiode may include a photon absorbing layer to absorb photons of an optical beam and to provide a response. The avalanche photodiode may include a gain response layer to provide a gain to the response. The avalanche photodiode may include a bias control structure connected to the gain response layer to control an electric field in the photon absorbing layer and the gain response layer.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: October 6, 2020
    Assignee: Lumentum Operations LLC
    Inventors: Alireza Samani, David Plant, Michael Ayliffe
  • Trenches for increasing a quantity of reliable chips produced from a wafer
    Patent number: 10784354
    Abstract: A light-emitting device may comprise a set of layers comprising a substrate layer, and a set of epitaxial layers deposited on the substrate layer. The set of epitaxial layers may include a strained layer. The strained layer may include a set of active zones to be used to generate optical gain. The light-emitting device may comprise a set of trenches etched into a subset of the set of layers of the light-emitting device. The set of trenches may prevent a set of defects or dislocations in a wafer from which the light-emitting device was formed from propagating into the set of active zones.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: September 22, 2020
    Assignee: Lumentum Operations LLC
    Inventors: Arnaud Fily, Victor Rossin, David Venables, Jingcong Wang
  • Reflective diffraction grating and fabrication method
    Patent number: 10768349
    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: June 30, 2017
    Date of Patent: September 8, 2020
    Assignee: Lumentum Operations LLC
    Inventors: John Michael Miller, Hery Djie, Patrick Lu, Xiaowei Guo, Qinghong Du, Eddie Chiu, Chester Murley
  • Emitter-on-sub-mount device
    Patent number: 10763639
    Abstract: A device may include a lead-frame including a first electrode and a second electrode, a carrier, a set of optical devices mechanically and electrically connected to the first electrode, and a set of electrical connections that electrically connects the second electrode to the set of optical devices. The lead-frame and the carrier may be mechanically connected to each other via a set of interlocking structures associated with the lead-frame and the carrier. The lead-frame and the set of optical devices may have matching coefficients of thermal expansion. The first electrode and the second electrode may be electrically isolated from each other.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: September 1, 2020
    Assignee: Lumentum Operations LLC
    Inventors: Kong Weng Lee, Vincent V. Wong, Jay A. Skidmore, Prasad Yalamanchili, Gity Samadi, Raman Srinivasan, Yongfeng Guan, Slava Khassine
  • Polarization multiplexer/demultiplexer with reduced polarization rotation
    Patent number: 10754221
    Abstract: An optical device may include a waveguide-based Mach-Zehnder (MZ) interferometer associated with performing polarization multiplexing or demultiplexing. The waveguide-based MZ interferomenter may include a first MZ arm, a second MZ arm, and a set of stress-balancing trenches. A portion of the first MZ arm may be between at least two stress-reducing trenches of a plurality of stress-reducing trenches. The plurality of stress-reducing trenches may be in a cladding layer on a substrate. The set of stress-balancing trenches may be on an opposite side of the second MZ arm from the plurality of stress-reducing trenches. The set of stress-balancing trenches may be in the cladding layer on the substrate.
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: August 25, 2020
    Assignee: Lumentum Operations LLC
    Inventor: Hiroaki Yamada
  • Fiber coupled laser source pump with wavelength division multiplexer, isolator, tap filter, and photodetector
    Patent number: 10746933
    Abstract: A pump laser package may include an input fiber to send signal light on a first optical path inside a package, a source to send pump light on a second optical path inside the package, and an output fiber on a third optical path inside the package. The pump laser package may include a WDM filter inside the package to receive the signal light on the first optical path and send the signal light on the third optical path, and receive the pump light on the second optical path and send the pump light on the third optical path. The pump laser package may include an isolator inside the package to transmit the signal light in a first direction, and block the signal light in a second direction, or a photo-diode to receive a portion of the signal light sent on a fourth optical path.
    Type: Grant
    Filed: June 1, 2017
    Date of Patent: August 18, 2020
    Assignee: Lumentum Operations LLC
    Inventors: Yonghong Guo, Nicolas Guerin, Chang Xiao, Xia Hong
  • Variable optical retarder
    Patent number: 10747044
    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: April 16, 2018
    Date of Patent: August 18, 2020
    Assignee: Lumentum Operations LLC
    Inventors: John Michael Miller, Gonzalo Wills
  • Electromagnetic interference leakage reduction for a pluggable optical module
    Patent number: 10746947
    Abstract: A pluggable optical module may include a housing enclosing one or more optical components and one or more electrical components. The pluggable optical module may include a slider to move along an exterior wall of the housing in association with latching or unlatching the pluggable optical module. The pluggable optical module may include an electromagnetic interference (EMI) shield arranged in a gap between the slider and the exterior wall of the housing such that the EMI shield contacts the slider and the exterior wall of the housing. The EMI shield reduce EMI radiation passing through the gap.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: August 18, 2020
    Assignee: Lumentum Operations LLC
    Inventors: Kit Chan, Jeffy Lu, Lynn Wang
  • Measurement device
    Patent number: 10742330
    Abstract: A measurement device may include a bias source to provide a bias, a photodiode to provide a linear current based on an input optical power and the bias, a log amplifier to receive the linear current and to provide a voltage, and one or more processors to receive the voltage and to determine a measurement of the input optical power at an observed temperature. The measurement may be determined based on a photodiode current corresponding to the voltage, a dark current, and a calibration current. The calibration current may be determined, for a threshold power range, based on a first plurality of current measurements at a first temperature and at a plurality of optical powers, a second current measurement at a second temperature and at a first optical power, and a third current measurement at the second temperature and at a second optical power.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: August 11, 2020
    Assignee: Lumentum Operations LLC
    Inventor: Shumin Wang
  • Optical interconnect device including a multi-fiber connector and an edge coupled connector
    Patent number: 10732366
    Abstract: An optical interconnect device may include a multi-fiber connector at a first end of the optical interconnect device. The optical interconnect device may include an edge coupled connector at a second end of the optical interconnect device. The optical interconnect device may include a plurality of optical fibers disposed inside the multi-fiber connector and the edge coupled connector to optically couple the multi-fiber connector to the edge coupled connector, wherein the multi-fiber connector and the edge coupled connector rigidly interconnect to structurally support the optical interconnect device.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: August 4, 2020
    Assignee: Lumentum Operations LLC
    Inventor: Georges Turcotte
  • Emitter array with shared via to an ohmic metal shared between adjacent emitters
    Patent number: 10720758
    Abstract: An emitter array may comprise a plurality of emitters that includes two adjacent emitters. The ohmic metal layer may include a portion that is shared by, and located between, the two adjacent emitters. The emitter array may comprise a protective layer over the ohmic metal layer. The emitter array may comprise a via through the protective layer to the portion. The via is shared by, and located between, the two adjacent emitters.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: July 21, 2020
    Assignee: Lumentum Operations LLC
    Inventors: Albert Yuen, Ajit Vijay Barve
  • Multi-layer thin film stack for diffractive optical elements
    Patent number: 10712475
    Abstract: An optical element may include a substrate. The optical element may include a first anti-reflectance structure for a particular wavelength range formed on the substrate. The optical element may include at least one layer disposed on a portion of the first anti-reflectance structure. The optical element may include a second anti-reflectance structure for the particular wavelength range formed on the at least one layer. A depth between a first surface of the first anti-reflectance structure and a second surface of the second anti-reflectance structure, a first index of refraction of the first anti-reflectance structure, a second index of refraction of the second anti-reflectance structure, and a third index of refraction of the at least one layer may be selected to form a diffractive optical element associated with a particular phase delay for the particular wavelength.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: July 14, 2020
    Assignee: Lumentum Operations LLC
    Inventors: John Michael Miller, Stephen Bagnald
  • Emitter array with variable spacing between adjacent emitters
    Patent number: 10714903
    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: June 28, 2019
    Date of Patent: July 14, 2020
    Assignee: Lumentum Operations LLC
    Inventors: Albert Yuen, Ajit Vijay Barve