Patents by Inventor Mohammad Mehdi Mansouri Rad

Mohammad Mehdi Mansouri Rad 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).

  • Publication number: 20210399806
    Abstract: An interconnect transceiver for transmitting and receiving optical signals, comprising an electronics module with a transceiver engine, and a photonics module with a laser source, a modulator, a photodetector to monitor the laser, one to receive an external optical signal, and a controller to operate the laser source and the laser source modulator, an electronic switch having two states is proposed. The first state is to allow monitoring of the modulated laser source by the transceiver engine, so as to acquire a reference set of operating parameters, and the second state is where a signal from the modulated laser source is directed to the controller, such as to allow real-time control of the source of the transmitting laser and modulator by the controller.
    Type: Application
    Filed: June 7, 2021
    Publication date: December 23, 2021
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Eric BERNIER, Mohammad Mehdi MANSOURI RAD
  • Patent number: 11187806
    Abstract: A LIDAR scanning system. The LIDAR system comprises a laser configured to transmit laser light. An optical switch is optically coupled to the laser to receive laser light via an input port. The optical switch includes a plurality of output ports for transmitting received laser light to an environment to be scanned. Each of the plurality of output ports is oriented in a different direction. A detector subsystem is positioned to receive reflected laser light. A processor is coupled to the detector subsystem. The processor is configured to receive data signals from the detector subsystem. The processor is also configured to determine a distance from the LIDAR scanning system to one or more objects in an environment of the LIDAR scanning system based on a time between a transmission of beams of laser light and a reception of a reflection of the beams of laser light.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: November 30, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Mohsen Rohani, Mohammad Mehdi Mansouri Rad, Song Zhang
  • Patent number: 11119342
    Abstract: An aspect of the disclosure provides an optical device including a microring resonator (MRR).
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: September 14, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Mohammad Mehdi Mansouri Rad, Hamid Ebrahimzad
  • Publication number: 20210255393
    Abstract: An aspect of the disclosure provides an optical device including a microring resonator (MRR).
    Type: Application
    Filed: February 14, 2020
    Publication date: August 19, 2021
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Mohammad Mehdi MANSOURI RAD, Hamid EBRAHIMZAD
  • Patent number: 11095509
    Abstract: A method and apparatus for controlling an optical switch. The switch includes a switching fabric and optical amplifiers for amplifying optical signals. A configuration for the switching fabric is generated and implemented. The configuration indicates a set of optical paths between switching fabric input ports and the output ports. Optical path losses through the switching fabric vary based on the configuration. An amplifier control signal for controlling gains of the optical amplifiers, is also provided. The configuration for the switching fabric is generated based on the gains of the optical amplifiers, the amplifier control signal is generated based on the configuration for the switching fabric, or both.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: August 17, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Mohammad Mehdi Mansouri Rad
  • Patent number: 10979140
    Abstract: There is provided apparatuses to detect occurrence and location of damages on optical fiber links in advance by converting an optical span in optical network to an interferometry based sensing media. The interferometry based sensing media may enable detection of mechanical perturbation or mechanical vibration occurred on optical fiber links across optical network. The system employed with the interferometry based sensing media can detect occurrence of mechanical perturbation or mechanical vibration as well as discover the location of such event occurred using standard interferometry based sensing techniques.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: April 13, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Mohammad Mehdi Mansouri Rad
  • Patent number: 10965370
    Abstract: An optical performance monitor comprises a first stage configured to receive a multiplexed optical signal. The first stage is tunable over a period. The first stage periodically filters the multiplexed optical signal over an optical channel to produce a fine filtered optical signal. A second stage is coupled to the first stage and has a second-stage transfer function. The second stage receives the fine filtered optical signal and produces one or a plurality of interfered optical signal pairs. A third stage is coupled to the second stage and has a third-stage transfer function. The third stage receives the optical signal pairs and demultiplexes the optical signal pairs to produce a plurality of demultiplexed optical signals. The combination of the second-stage transfer function and the third-stage transfer function is flatter over the optical channel than the third-stage transfer function.
    Type: Grant
    Filed: June 1, 2020
    Date of Patent: March 30, 2021
    Assignees: Huawei Technologies Canada Co., Ltd., The University of Ottawa
    Inventors: Mohammad Mehdi Mansouri Rad, Patrick Dumais, Trevor James Hall, Mehedi Hasan
  • Publication number: 20210075674
    Abstract: A method and apparatus for controlling an optical switch. The switch includes a switching fabric and optical amplifiers for amplifying optical signals. A configuration for the switching fabric is generated and implemented. The configuration indicates a set of optical paths between switching fabric input ports and the output ports. Optical path losses through the switching fabric vary based on the configuration. An amplifier control signal for controlling gains of the optical amplifiers, is also provided. The configuration for the switching fabric is generated based on the gains of the optical amplifiers, the amplifier control signal is generated based on the configuration for the switching fabric, or both.
    Type: Application
    Filed: September 11, 2019
    Publication date: March 11, 2021
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Mohammad Mehdi MANSOURI RAD
  • Patent number: 10921453
    Abstract: A LIDAR includes multiple light sources and a Liquid Crystal on Silicon (LCOS) device for controllably redirecting beams from each of the multiple light sources. The same or a different LCOS device can be used to controllably redirect reflected light to each of several corresponding light detectors. The LCOS device can be adjusted on a slower time scale while the light sources can be sequentially activated on a faster time scale. The LCOS device provides for fine steering control of LIDAR beams. The use of multiple light sources and detectors allows for a higher LIDAR scan rate.
    Type: Grant
    Filed: May 29, 2018
    Date of Patent: February 16, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Patrick Dumais, Eric Bernier, Mohammad Mehdi Mansouri Rad
  • Publication number: 20210013962
    Abstract: There is provided apparatuses to detect occurrence and location of damages on optical fiber links in advance by converting an optical span in optical network to an interferometry based sensing media. The interferometry based sensing media may enable detection of mechanical perturbation or mechanical vibration occurred on optical fiber links across optical network. The system employed with the interferometry based sensing media can detect occurrence of mechanical perturbation or mechanical vibration as well as discover the location of such event occurred using standard interferometry based sensing techniques.
    Type: Application
    Filed: July 9, 2019
    Publication date: January 14, 2021
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Mohammad Mehdi MANSOURI RAD
  • Publication number: 20200412447
    Abstract: An optical performance monitor comprises a first stage configured to receive a multiplexed optical signal. The first stage is tunable over a period. The first stage periodically filters the multiplexed optical signal over an optical channel to produce a fine filtered optical signal. A second stage is coupled to the first stage and has a second-stage transfer function. The second stage receives the fine filtered optical signal and produces one or a plurality of interfered optical signal pairs. A third stage is coupled to the second stage and has a third-stage transfer function. The third stage receives the optical signal pairs and demultiplexes the optical signal pairs to produce a plurality of demultiplexed optical signals. The combination of the second-stage transfer function and the third-stage transfer function is flatter over the optical channel than the third-stage transfer function.
    Type: Application
    Filed: June 1, 2020
    Publication date: December 31, 2020
    Applicants: Huawei Technologies Canada Co., Ltd., The University of Ottawa
    Inventors: Mohammad Mehdi MANSOURI RAD, Patrick DUMAIS, Trevor James HALL, Mehedi HASAN
  • Patent number: 10784979
    Abstract: A wavelength selective switch (WSS), reconfigurable optical add-drop multiplexer (ROADM) and methods of determining a condition of a domain network section are provided. The WSS and ROADM include a light source for sending an optical signal having a characteristic. The method comprises instructing a light source to send an optical signal across an optical link, obtaining measurements of characteristic values of the optical signal received at and sent by components along the domain network section, comparing the characteristic values to pre-defined limits, and determining the condition of the domain network section based on the characteristic values.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: September 22, 2020
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Mohammad Mehdi Mansouri Rad, Hamid Mehrvar
  • Patent number: 10613276
    Abstract: A LIDAR or other optical beamsteering apparatus includes an optical switch having a first port and a plurality of second ports. The switch is operated to establish an optical path between the first port and one of the second ports. The first port is connected to a light source or a light detector. Different second ports are connected to different surface/edge couplers. Each of the surface/edge couplers couples light from or to the apparatus in a different respective direction. The surface/edge couplers can be grating couplers. The direction of light coupling is configured due to the orientation of the surface/edge coupler and its grating period, where applicable. Surface/edge couplers can be arranged in a circular or concentric ring pattern. Grating couplers can be elongated.
    Type: Grant
    Filed: June 8, 2018
    Date of Patent: April 7, 2020
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Mohammad Mehdi Mansouri Rad, Patrick Dumais, Dominic John Goodwill, Eric Bernier
  • Patent number: 10511382
    Abstract: A monitoring and calibration apparatus for an optical networking device such as ROADM is provided. Reflectors are integrated into the device, for example at the ends of optical interconnect cables. The reflectors reflect light in specific monitoring wavelengths and pass other wavelengths such as those used for communication. A light source emits monitoring light which is reflected by the reflector and measured by a detector to measure the integrity of optical paths. The optical paths can include optical cables and cable connectors. Path integrity between different modules of the device can therefore be monitored. Multiple reflectors, reflecting light in different wavelengths, can be placed in series along the same optical path and used to monitor multiple segments of the path. A wavelength selective switch (WSS) of the device can be used to route monitoring light to different optical paths. The WSS also operates to route communication signals in the device.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: December 17, 2019
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Mohammad Mehdi Mansouri Rad, Hamid Mehrvar, Zhiping Jiang, Eric Bernier
  • Publication number: 20190377135
    Abstract: A LIDAR or other optical beamsteering apparatus includes an optical switch having a first port and a plurality of second ports. The switch is operated to establish an optical path between the first port and one of the second ports. The first port is connected to a light source or a light detector. Different second ports are connected to different surface/edge couplers. Each of the surface/edge couplers couples light from or to the apparatus in a different respective direction. The surface/edge couplers can be grating couplers. The direction of light coupling is configured due to the orientation of the surface/edge coupler and its grating period, where applicable. Surface/edge couplers can be arranged in a circular or concentric ring pattern. Grating couplers can be elongated.
    Type: Application
    Filed: June 8, 2018
    Publication date: December 12, 2019
    Applicant: Huawei Technologies Co., Ltd.
    Inventors: Mohammad Mehdi MANSOURI RAD, Patrick DUMAIS, Dominic John GOODWILL, Eric BERNIER
  • Publication number: 20190369254
    Abstract: A LIDAR includes multiple light sources and a Liquid Crystal on Silicon (LCOS) device for controllably redirecting beams from each of the multiple light sources. The same or a different LCOS device can be used to controllably redirect reflected light to each of several corresponding light detectors. The LCOS device can be adjusted on a slower time scale while the light sources can be sequentially activated on a faster time scale. The LCOS device provides for fine steering control of LIDAR beams. The use of multiple light sources and detectors allows for a higher LIDAR scan rate.
    Type: Application
    Filed: May 29, 2018
    Publication date: December 5, 2019
    Applicant: Huawei Technologies Co., Ltd.
    Inventors: Patrick DUMAIS, Eric BERNIER, Mohammad Mehdi MANSOURI RAD
  • Patent number: 10454583
    Abstract: A method for assigning a network path after receiving a connection request to connect a first node with a second node of a network. The method including evaluating a network utilization parameter of the network, such as a network load or blocking probability, at that point in time. If the network utilization parameter is below a minimum threshold level, the method includes carrying out the steps of identifying a set of n network paths through the network that connect the first node with the second node and are absent non-linear links, performing network path selection by selecting p network paths from the set of n network paths that have the best linear OSNR, and, selecting a network path from the set of p network paths that balances the wavelength utilization between the first node and the second node of a network.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: October 22, 2019
    Assignee: HUAWEI TECHNOLOGIES CO., LTD
    Inventors: Hamid Mehrvar, Mohammad Mehdi Mansouri Rad
  • Patent number: 10397190
    Abstract: A system and method for obfuscating an optical signal is disclosed. Obfuscating the optical signal may make it more difficult for the optical signal to be detected by an interloper. In one embodiment, an optical signal is received at an optical transmitter, and an obfuscated optical signal is generated by performing a modification of the received optical signal. The obfuscated optical signal is then transmitted from the optical transmitter to an optical receiver. An at least partially deobfuscated optical signal is generated at the optical receiver by performing a modification of the obfuscated optical signal. The modification performed at the optical receiver corresponds to the modification performed at the optical transmitter.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: August 27, 2019
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Mehdi Arashmid Akhavain Mohammadi, Hamid Mehrvar, Mohammad Mehdi Mansouri Rad
  • Patent number: 10386582
    Abstract: A photonic device such as a polarization controller includes a coupler, such as a 2×2 MMI coupler, or a series of such couplers. Couplers may be interspersed with other components such as phase shifters. Photodetectors such as photodiodes are coupled to input and output lines of the coupler or couplers, for example via taps. In various embodiments, all of the couplers include photodetectors monitoring light power for at least two of their inputs and outputs, and at least one of the couplers includes photodetectors monitoring at least three of its inputs and outputs. The arrangement of photodetectors can provide sufficient information for feedback control of the photonic device and/or determining the state of polarization of light within the photonic device. Signals from some photodetectors can be used to estimate light power at locations in the photonic device lacking photodetectors.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: August 20, 2019
    Assignee: HUAWEI TECHNOOGIES CO., LTD.
    Inventors: Mohammad Mehdi Mansouri Rad, Dominic John Goodwill, Jia Jiang
  • Publication number: 20190238224
    Abstract: A monitoring and calibration apparatus for an optical networking device such as ROADM is provided. Reflectors are integrated into the device, for example at the ends of optical interconnect cables. The reflectors reflect light in specific monitoring wavelengths and pass other wavelengths such as those used for communication. A light source emits monitoring light which is reflected by the reflector and measured by a detector to measure the integrity of optical paths. The optical paths can include optical cables and cable connectors. Path integrity between different modules of the device can therefore be monitored. Multiple reflectors, reflecting light in different wavelengths, can be placed in series along the same optical path and used to monitor multiple segments of the path. A wavelength selective switch (WSS) of the device can be used to route monitoring light to different optical paths. The WSS also operates to route communication signals in the device.
    Type: Application
    Filed: January 30, 2018
    Publication date: August 1, 2019
    Applicant: Huawei Technologies Co., Ltd.
    Inventors: Mohammad Mehdi MANSOURI RAD, Hamid MEHRVAR, Zhiping JIANG, Eric BERNIER