Search Patents
  • Device and method for post-fabrication trimming of an optical ring resonator using a dopant-based heater
    Patent number: 9946027
    Abstract: A device and method for post-fabrication trimming of an optical ring resonator using a dopant-based heater is provided. An optical ring resonator at the device can be heated using heaters in an optical slab from which the optical ring resonator extends, the heater including a non-uniform doping profile. A controller determines an initial resonance frequency and a target resonance frequency of the optical ring resonator. The controller applies predetermined electrical parameters to the heater using electrical connections to shift a resonance frequency of the optical ring resonator from the initial resonance frequency to the target resonance frequency by causing the dopant in the heater to migrate.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: April 17, 2018
    Assignee: RANOVUS INC.
    Inventor: Andrew Peter Knights
  • Carrier based laser assembly and method of assembly thereof with photonic integrated circuit
    Patent number: 11747554
    Abstract: A carrier laser device assembly is provided in which a visible region of a laser that includes an output portion and/or output portion of a waveguide of the laser is visible to an imaging system when the laser is attached to a carrier. The laser may be burned-in and/or tested prior to attachment to a photonic integrated circuit. The output portion and/or output portion of waveguide may be aligned with a corresponding input portion and/or input portion of a waveguide of the PIC as the laser assembly is being attached to the PIC via imaging of the visible portion by the imaging system.
    Type: Grant
    Filed: May 18, 2021
    Date of Patent: September 5, 2023
    Assignee: RANOVUS INC.
    Inventors: Ryan Murray Hickey, Douglas J. S. Beckett, Jeffrey Otha Hutchins
  • DISCRETELY TUNABLE LOCALLY SEEDED LASER DEVICE
    Publication number: 20140050237
    Abstract: A discretely tunable locally seeded laser device is provided. The discretely tunable locally seeded laser device comprises: a first tunable laser comprising first discrete output modes; and, a second tunable laser arranged to receive output from the first tunable laser, but otherwise optically isolated from the first tunable laser, the second tunable laser comprising second discrete output modes, such that one first discrete output mode can optically seed an aligned second discrete output mode in a given position of one or more of the first discrete output modes and the second discrete output modes, the aligned second discrete output mode comprising a dominant output.
    Type: Application
    Filed: August 15, 2012
    Publication date: February 20, 2014
    Applicant: RANOVUS INC.
    Inventors: Bin CAO, Douglas J.S. BECKETT, David NICHOLSON
  • OPTICAL DISPERSION COMPENSATION DEVICES
    Publication number: 20150311978
    Abstract: Optical dispersion compensation devices are provided herein that are based on one or more optical ring resonators. The degree of dispersion compensation can be selected by controlling the degree of under-coupling and by tuning physical properties of the optical ring resonators. In a first implementation, an optical ring resonator under-coupled to an optical throughput bus can be used to provide positive or negative dispersion compensation depending on tuning of the optical ring resonator, which widens the dispersion window. In a second implementation, an over-coupled optical ring resonator can be added to the optical throughput bus to provide a cascaded filter. In a third implementation optical ring resonators arranged in series between an optical input bus and an optical output bus can be used to both tune dispersion compensation and provide demultiplexing.
    Type: Application
    Filed: April 23, 2014
    Publication date: October 29, 2015
    Applicant: RANOVUS INC.
    Inventors: Rong CHEN, Douglas J.S. BECKETT, Dylan LOGAN
  • Optical dispersion compensation devices
    Patent number: 9319136
    Abstract: Optical dispersion compensation devices are provided herein that are based on one or more optical ring resonators. The degree of dispersion compensation can be selected by controlling the degree of under-coupling and by tuning physical properties of the optical ring resonators. In a first implementation, an optical ring resonator under-coupled to an optical throughput bus can be used to provide positive or negative dispersion compensation depending on tuning of the optical ring resonator, which widens the dispersion window. In a second implementation, an over-coupled optical ring resonator can be added to the optical throughput bus to provide a cascaded filter. In a third implementation optical ring resonators arranged in series between an optical input bus and an optical output bus can be used to both tune dispersion compensation and provide demultiplexing.
    Type: Grant
    Filed: April 23, 2014
    Date of Patent: April 19, 2016
    Assignee: RANOVUS INC.
    Inventors: Rong Chen, Douglas J. S. Beckett, Dylan Logan
  • Device and method for tuning a ring resonator using self-heating stabilization
    Patent number: 9893487
    Abstract: A device and method for tuning a ring resonator using self-heating stabilization is provided. A light source is controlled to produce an optical signal, input to an optical ring resonator, at a power where self-heating shifts a resonance wavelength of the optical ring resonator by at least 10 picometers, the self-heating comprising absorption in the optical ring resonator of optical power from a received optical signal. Prior to using the optical ring resonator at least one of modulate and filter the optical signal at the optical ring resonator, a heater of the optical ring resonator is controlled to an operating temperature at which the resonance wavelength of the optical ring resonator is greater than a respective wavelength of the optical signal.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: February 13, 2018
    Assignee: RANOVUS INC.
    Inventors: Bin Cao, Dylan Logan, Douglas J. S. Beckett, Rong Chen, Andrew Peter Knights
  • Photonic integrated chip device having a common optical edge interface
    Patent number: 10250335
    Abstract: A photonic integrated chip device having a common optical edge interface is provided and specifically a device comprising: a photonic integrated circuit (PIC) chip comprising: an optical circuit; and an electrical interface configured to receive electrical signals for controlling the optical circuit; and, a common optical interface side of the PIC chip comprising: at least one input configured to receive light into the PIC chip to the optical circuit; and at least one output configured to convey at least one optical signal from the optical circuit out of the PIC chip, the electrical interface located on one or more electrical interface sides of the PIC chip different from the common optical interface side.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: April 2, 2019
    Assignee: RANOVUS INC.
    Inventor: Ryan Murray Hickey
  • Multi-segment ring modulator
    Patent number: 9784995
    Abstract: A device that includes a multi-segment ring modulator is provided. In particular, the device comprises: an optical waveguide; an optical ring modulator optically coupled to the optical waveguide; a first voltage control device along a first segment of the optical ring modulator; a second voltage control device along a second segment of the optical ring modulator; a first driver device configured to control the first voltage control device to a first voltage and a second voltage; and, a second driver device configured to control the second voltage control device to a third voltage and a fourth voltage. In particular implementations, a ratio of a length of the first segment to a length of the second segment can be one or more of about 2:1 and greater than 1:1, and non-linear driver devices can be used.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: October 10, 2017
    Assignee: RANOVUS INC.
    Inventors: Juergen Hauenschild, David John Nicholson, Dylan Logan
  • Discretely tunable laser device
    Patent number: 9014222
    Abstract: A discretely tunable laser device is provided. The discretely tunable laser device comprises: a laser comprising a plurality of discrete output modes; an optical filter for receiving output from the laser but otherwise optically isolated from the laser, the optical filter comprising a plurality of transmission peaks, each separated by a transmission spacing different from a spacing of the plurality of discrete output modes such that only one discrete output mode can predominantly align with one transmission peak when the plurality of discrete output modes are tuned; and, a control apparatus for tuning the discrete output modes of the laser to align a given output mode of the plurality of discrete output modes with a given transmission peak of the plurality of transmission peaks, such that the given output mode comprises a dominant output of the optical filter.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: April 21, 2015
    Assignee: Ranovus Inc.
    Inventor: Douglas J. S. Beckett
  • Optical coupler with a waveguide and waveguide index matched materials at an edge of a substrate
    Patent number: 10107960
    Abstract: A device that includes an optical coupler with a waveguide and waveguide index matched materials at an edge of a substrate, and a method of forming the device, is provided herein. The device comprises: a substrate having an edge, and an opening formed therein adjacent the edge; a layer of insulator on the substrate, which forms a bridge across the opening at the edge; a waveguide on the layer of insulator, the waveguide comprising a constant-width region and a tapered region terminating at the edge in a region of the opening; a first layer of optical epoxy in the opening, the optical epoxy indexed matched to the layer of insulator; and, a second layer of the optical epoxy on the tapered region, such that the optical epoxy optically contains an optical signal leaking from the waveguide in the tapered region.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: October 23, 2018
    Assignee: RANOVUS INC.
    Inventors: Ryan Murray Hickey, Christopher James Brooks, Dylan Logan, Andrew Peter Knights
  • Device and method for tuning a ring resonator using self-heating stabilization
    Patent number: 10236657
    Abstract: A device and method for tuning a ring resonator using self-heating stabilization is provided. A light source is controlled to produce an optical signal, input to an optical ring resonator, at a power where self-heating shifts a resonance wavelength of the optical ring resonator by at least 10 picometers, the self-heating comprising absorption in the optical ring resonator of optical power from a received optical signal. Prior to using the optical ring resonator at least one of modulate and filter the optical signal at the optical ring resonator, a heater of the optical ring resonator is controlled to an operating temperature at which the resonance wavelength of the optical ring resonator is greater than a respective wavelength of the optical signal.
    Type: Grant
    Filed: February 9, 2018
    Date of Patent: March 19, 2019
    Assignee: RANOVUS INC.
    Inventors: Bin Cao, Dylan Logan, Douglas J. S. Beckett, Rong Chen, Andrew Peter Knights
  • DISCRETELY TUNABLE LASER DEVICE
    Publication number: 20140050236
    Abstract: A discretely tunable laser device is provided. The discretely tunable laser device comprises: a laser comprising a plurality of discrete output modes; an optical filter for receiving output from the laser but otherwise optically isolated from the laser, the optical filter comprising a plurality of transmission peaks, each separated by a transmission spacing different from a spacing of the plurality of discrete output modes such that only one discrete output mode can predominantly align with one transmission peak when the plurality of discrete output modes are tuned; and, a control apparatus for tuning the discrete output modes of the laser to align a given output mode of the plurality of discrete output modes with a given transmission peak of the plurality of transmission peaks, such that the given output mode comprises a dominant output of the optical filter.
    Type: Application
    Filed: August 15, 2012
    Publication date: February 20, 2014
    Applicant: RANOVUS INC.
    Inventor: Douglas J.S. BECKETT
  • Optical ring resonator structure with a backside recess
    Patent number: 10254485
    Abstract: An optical ring resonator structure with a backside recess is provided at a device. The device includes: a substrate having a device-side and a backside opposite the device-side; an optical ring resonator located on the device-side of the substrate; a heater having a shape complementary to the optical ring resonator, the heater positioned to heat the optical ring resonator; and one or more metal traces that connect at least to the heater, the metal traces configured to provide power to the heater and extending outward from the heater. The device further includes a recess on the backside of the substrate, the recess centered on the optical ring resonator, and having a diameter larger than both respective outer diameters of the optical ring resonator and the heater, the recess further extending laterally into a region of the one or more metal traces.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: April 9, 2019
    Assignee: RANOVUS INC.
    Inventors: Ryan Murray Hickey, Dylan Logan, Christopher James Brooks
  • Adiabatic elliptical optical coupler device
    Patent number: 9726821
    Abstract: An adiabatic elliptical optical coupler device is provided comprising: a substrate having an edge; a first waveguide on the substrate, the first waveguide comprising a constant-width region and a tapered region terminating at the edge of the substrate, the tapered region having a smaller width at the edge than at the constant-width region; and, a pair of second waveguides on the substrate, and located on either side of the tapered region, each of the pair of the second waveguides terminating at the edge at a first end and extending to a second end adjacent the constant-width region, and distal the first end; at least a portion of each of the pair of second waveguides being tapered, and optically coupled to the first waveguide to transition a mode of an optical signal in the first waveguide from an elliptical mode at the edge towards a confined mode.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: August 8, 2017
    Assignee: RANOVUS INC.
    Inventors: Kyle Murray, Dylan Logan, Christopher James Brooks, Ryan Murray Hickey
  • Variable optical attenuator assisted control of optical devices
    Patent number: 11646540
    Abstract: Variable optical attenuator assisted control of optical devices is provided. A device comprises: an uncooled laser and ring resonator modulator, an optical waveguide configured convey an optical signal of the laser from an input to an output, a heater that heats the ring resonator modulator, a variable optical attenuator that attenuates the optical signal on the optical waveguide, one or more power monitors and a controller. The controller is configured to: in response to determining that one or more of: heater power overhead is unavailable to reduce heater power for laser wavelength tracking; and the heater power is at or below a given lower heater power; and determining that that laser current is increased to assist with ring resonator modulator control for the laser wavelength tracking: control, using the one or more power monitors, attenuation of the VOA to control the output power into a target output power range.
    Type: Grant
    Filed: August 6, 2020
    Date of Patent: May 9, 2023
    Assignee: RANOVUS INC.
    Inventor: Bin Cao
  • Single laser multi-frequency transmitter
    Patent number: 9389365
    Abstract: A single laser multi-frequency transmitter is provided, comprising: a laser generating given modes; an optical input bus; a common optical output bus; coupling optics coupling the laser to the optical input bus; a plurality of ring resonator filters: arranged in series along the optical input bus in a one-to-one relationship with a sub-band of the given modes; optically coupled to both the optical input bus and the common optical output bus; and each configured to couple one respective frequency from the sub-band to the common optical output bus; and, a plurality of ring resonator modulators: arranged in series along the common optical output bus in a one-to-one relationship with the plurality of ring resonator filters; and each configured to modulate one given respective frequency from the sub-band so that all modes in the sub-band are modulated on the common optical output bus.
    Type: Grant
    Filed: May 8, 2014
    Date of Patent: July 12, 2016
    Assignee: RANOVUS INC.
    Inventors: David John Nicholson, Dylan Logan, Douglas J. S. Beckett, Jeffrey Otha Hutchins
  • SINGLE LASER MULTI-FREQUENCY TRANSMITTER
    Publication number: 20150323743
    Abstract: A single laser multi-frequency transmitter is provided, comprising: a laser generating given modes; an optical input bus; a common optical output bus; coupling optics coupling the laser to the optical input bus; a plurality of ring resonator filters: arranged in series along the optical input bus in a one-to-one relationship with a sub-band of the given modes; optically coupled to both the optical input bus and the common optical output bus; and each configured to couple one respective frequency from the sub-band to the common optical output bus; and, a plurality of ring resonator modulators: arranged in series along the common optical output bus in a one-to-one relationship with the plurality of ring resonator filters; and each configured to modulate one given respective frequency from the sub-band so that all modes in the sub-band are modulated on the common optical output bus.
    Type: Application
    Filed: May 8, 2014
    Publication date: November 12, 2015
    Applicant: RANOVUS INC.
    Inventors: David John NICHOLSON, Dylan LOGAN, Douglas J. S. BECKETT, Jeffrey Otha HUTCHINS
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