Patents by Inventor Mohammad Mahbobzadeh

Mohammad Mahbobzadeh 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: 9379513
    Abstract: A Raman amplifier comprising a gain control unit adapted to control a pump power of an optical pump signal in response to at least one monitored optical feedback signal reflected back from a transmission line fiber connected to said pumped Raman amplifier.
    Type: Grant
    Filed: June 9, 2014
    Date of Patent: June 28, 2016
    Assignee: ADVA Optical Networking SE
    Inventors: Dogan Atlas, Mohammad Taleghani, Mohammad Mahbobzadeh, Kyle Hamilton
  • Patent number: 8854726
    Abstract: A Raman amplifier comprising a gain control unit adapted to control a pump power of an optical pump signal in response to at least one monitored optical feedback signal reflected back from a transmission line fiber connected to said pumped Raman amplifier.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: October 7, 2014
    Assignee: ADVA Optical Networking SE
    Inventors: Dogan Atlas, Mohammad Taleghani, Mohammad Mahbobzadeh, Kyle Hamilton
  • Patent number: 8848283
    Abstract: It is described an optical amplification device for receiving an optical input signal and transmitting an amplified optical output signal on the basis of the optical input signal comprising an optical amplifier that comprises an input and an output. An optical gain control unit is connected to the output path of the optical amplifier and the optical gain control unit is connected to the input path of the optical amplifier. The optical gain control unit is configured to control the gain of the optical output signal. Additionally, an electrical gain control unit is connected to the output path of the optical amplifier. The electrical gain control unit is also connected to the input path of the optical amplifier. The electrical gain control unit is configured to control the gain of the optical output signal. By providing both an electrical gain control unit and an optical gain control unit, a control characteristic can be improved.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: September 30, 2014
    Assignee: ADVA Optical Networking SE
    Inventors: Dogan Atlas, Mohammad Mahbobzadeh
  • Publication number: 20140285874
    Abstract: A Raman amplifier comprising a gain control unit adapted to control a pump power of an optical pump signal in response to at least one monitored optical feedback signal reflected back from a transmission line fiber connected to said pumped Raman amplifier.
    Type: Application
    Filed: June 9, 2014
    Publication date: September 25, 2014
    Inventors: Dogan Atlas, Mohammad Taleghani, Mohammad Mahbobzadeh, Kyle Hamilton
  • Publication number: 20130242379
    Abstract: A Raman amplifier comprising a gain control unit adapted to control a pump power of an optical pump signal in response to at least one monitored optical feedback signal reflected back from a transmission line fiber connected to said pumped Raman amplifier.
    Type: Application
    Filed: March 13, 2012
    Publication date: September 19, 2013
    Applicant: ADVA AG Optical Networking
    Inventors: Dogan Atlas, Mohammad Taleghani, Mohammad Mahbobzadeh, Kyle Hamilton
  • Publication number: 20120099186
    Abstract: It is described an optical amplification device for receiving an optical input signal and transmitting an amplified optical output signal on the basis of the optical input signal comprising an optical amplifier that comprises an input and an output. An optical gain control unit is connected to the output path of the optical amplifier and the optical gain control unit is connected to the input path of the optical amplifier. The optical gain control unit is configured to control the gain of the optical output signal. Additionally, an electrical gain control unit is connected to the output path of the optical amplifier. The electrical gain control unit is also connected to the input path of the optical amplifier. The electrical gain control unit is configured to control the gain of the optical output signal. By providing both an electrical gain control unit and an optical gain control unit, a control characteristic can be improved.
    Type: Application
    Filed: October 21, 2010
    Publication date: April 26, 2012
    Applicant: ADVA AG OPTICAL NETWORKING
    Inventors: Dogan Atlas, Mohammad Mahbobzadeh
  • Patent number: 5052016
    Abstract: A resonant-periodic-gain distributed-feedback surface-emitting semiconductor laser has a resonator with an axis perpendicular to the plane of the substrate. The resonator comprises a stack of distributed feedback elements, each consisting of a spacer region and a very thin gain element positioned at an antinode of a standing wave inside the resonator at a designed wavelength. Each gain element consists of one or a group of closely spaced quantum-well layers. Each spacer, separating two adjacent gain elements, consists of two intermediate-and low-refractive-index layers, each layer of the spacer having an optical thickness approximately equal to a quarter of the designed wavelength. The refractive index of each of the gain elements is higher than that of the spacer materials. The device can be surrounded by a material of refractive index lower than all materials comprising the device for better confinement of carriers and control of guided modes of radiation.
    Type: Grant
    Filed: May 18, 1990
    Date of Patent: September 24, 1991
    Assignee: University of New Mexico
    Inventors: Mohammad Mahbobzadeh, Marek A. Osinski