Patents by Inventor Ashkan Seyedi

Ashkan Seyedi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10243662
    Abstract: One example includes a bias-based Mach-Zehnder modulation (MZM) system. The system includes a Mach-Zehnder modulator to receive and split an optical input signal and to provide an intensity-modulated optical output signal based on a high-frequency data signal to modulate a relative phase of the split optical input signal to transmit data and based on a bias voltage to modulate the relative phase of the split optical input signal to tune the Mach-Zehnder modulator. The system also includes a bias feedback controller to compare a detection voltage associated with the intensity-modulated output signal with a reference voltage to measure an extinction ratio associated with an optical power of the intensity-modulated optical output signal and to adjust the bias voltage based on the comparison to substantially maximize the extinction ratio.
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: March 26, 2019
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Cheng Li, Jim Huang, Ashkan Seyedi, Marco Fiorentino, Raymond G Beausoleil
  • Publication number: 20190064443
    Abstract: In the examples provided herein, a system has a first racetrack resonant waveguide structure, positioned to enable an input light signal to couple from a first waveguide; and a second racetrack resonant waveguide structure, positioned to enable the input light signal to couple between the first racetrack resonant waveguide structure and the second racetrack resonant waveguide structure, and further positioned to enable an output light signal to couple from the second racetrack resonant waveguide structure to a second waveguide. The system also has a primary heating unit, positioned to heat a primary region including a first portion of the first racetrack resonant waveguide structure and a first portion of the second racetrack resonant waveguide structure, to change a central frequency and a passband width for the system.
    Type: Application
    Filed: September 22, 2015
    Publication date: February 28, 2019
    Inventors: Mir Ashkan Seyedi, Chin-Hui Chen
  • Publication number: 20190068291
    Abstract: An optical system includes an optical transmitter having optical transmission channels and an optical receiver having optical reception channels. The optical transmission channels are successively tuned to resonant wavelengths at which lowest transmission channel input currents result in transmission channel output current peaks greater than a threshold. The optical reception channels are tuned to the resonant wavelengths after the optical transmission channels are tuned. Each resonant wavelength has the optical reception channel tuned thereto that has a highest reception channel output current peak at a lowest reception channel input current when the optical transmission channel tuned to the resonant wavelength is temporarily detuned.
    Type: Application
    Filed: August 31, 2017
    Publication date: February 28, 2019
    Inventor: Ashkan Seyedi
  • Publication number: 20190020419
    Abstract: In one example, an apparatus includes e first beam splitter having a final output and a second output. A first optical waveguide is coupled to the first output, and a second optical waveguide is coupled to the second output. A first tunable phase delay is further coupled to the second optical waveguide and has a third output. A first set of phase modulators is coupled to the first optical waveguide, and a second set of phase modulators is coupled to the third output of the first tunable phase delay. At least one of the first set of phase modulators and the second set of phase modulators includes a phase modulator that is driven to three or more distinct phase states. A second beam splitter has a first input coupled to the first optical waveguide and a second input coupled to the second optical waveguide.
    Type: Application
    Filed: August 6, 2015
    Publication date: January 17, 2019
    Inventors: Jason PELC, Ashkan SEYEDI, Marco FIORENTINO
  • Publication number: 20190020416
    Abstract: An example system includes an optical modulator and a multiplexing controller. The modulator includes a data bus for receiving at least one data signal, a plurality of multiplexers and a plurality of modulating segments. Each multiplexer is coupled to the data bus to receive at least one data signal and to output a multiplexed signal. Each modulating segment may receive the multiplexed signal from one of the plurality of multiplexers and modulate the multiplexed signal using an optical input. The multiplexing controller may be in communication with the plurality of multiplexers and may configure each of the plurality of multiplexers in accordance with a selected modulation type.
    Type: Application
    Filed: January 15, 2016
    Publication date: January 17, 2019
    Inventors: Tsung-Ching Huang, Ashkan Seyedi, Chin-Hui Chen, Cheng Li, Marco Fiorentino, Raymond G. Beausoleil
  • Publication number: 20180267240
    Abstract: An apparatus includes an optical rib waveguide on a substrate, the optical rib waveguide further includes: a slab layer of silicon, a shallow rib of silicon in height that tapers laterally along a taper region, a deep rib of silicon that meets the shallow rib along the taper region of the shallow rib, and wherein the deep rib and the shallow rib have a same width, and wherein the shallow rib has a greater height than the deep rib, a core of silicon that tapers laterally in a range of 50-90% and extends on top of the deep rib and the shallow rib, and a cladding layer of silicon oxide that covers the slab, core, deep rib, and shallow rib.
    Type: Application
    Filed: September 4, 2015
    Publication date: September 20, 2018
    Inventors: Mir Ashkan SEYEDI, Chin-Hui CHEN
  • Publication number: 20180210241
    Abstract: In one example, a device includes a bus waveguide to carry a light of a carrier wavelength, a first ring waveguide with a first modulator, a first heater to adjust a resonance wavelength of the first ring waveguide, and a second ring waveguide with a second modulator. The first ring waveguide and the second ring waveguide are coupled to the bus waveguide and are to modulate the light of the carrier wavelength to impart one of at least four optical power levels to the light. In another example, a device includes, a bus waveguide, a first ring waveguide with a first modulator, and a second ring waveguide with a second modulator. The first ring waveguide and the second ring waveguide are coupled to the bus waveguide and are to modulate a light of a carrier wavelength to impart one of at least four optical power levels to the light.
    Type: Application
    Filed: July 23, 2015
    Publication date: July 26, 2018
    Inventors: Mir Ashkan SEYEDI, Chin-Hui CHEN
  • Publication number: 20180109322
    Abstract: One example includes a bias-based Mach-Zehnder modulation (MZM) system. The system includes a Mach-Zehnder modulator to receive and split an optical input signal and to provide an intensity-modulated optical output signal based on a high-frequency data signal to modulate a relative phase of the split optical input signal to transmit data and based on a bias voltage to modulate the relative phase of the split optical input signal to tune the Mach-Zehnder modulator. The system also includes a bias feedback controller to compare a detection voltage associated with the intensity-modulated output signal with a reference voltage to measure an extinction ratio associated with an optical power of the intensity-modulated optical output signal and to adjust the bias voltage based on the comparison to substantially maximize the extinction ratio.
    Type: Application
    Filed: May 27, 2015
    Publication date: April 19, 2018
    Inventors: Cheng Li, Jim Huang, Ashkan Seyedi, Marco Fiorentino, Raymond G Beausoleil