Patents by Inventor Kenichi Abiko

Kenichi Abiko 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: 6940638
    Abstract: Optical frequency conversion systems and methods are described. In one aspect, an optical frequency conversion system for generating a frequency-shifted replica of an input optical signal includes a phase modulation control signal generator and an optical phase modulator. The phase modulation control signal generator receives the input optical signal and generates a phase modulation control signal characterized by a sequence of phase shift control portions synchronized to the input optical signal. The optical phase modulator receives the input optical signal and phase shifts the input optical signal in accordance with the phase shift control portions of the phase modulation control signal to generate a frequency-converted replica of the input optical signal. An optical frequency conversion method for generating a frequency-shifted replica of an input optical signal also is described.
    Type: Grant
    Filed: April 15, 2003
    Date of Patent: September 6, 2005
    Assignee: Agilent Technologies, Inc.
    Inventors: You Kondoh, Norihide Yamada, Kenichi Abiko
  • Publication number: 20040008403
    Abstract: Optical frequency conversion systems and methods are described. In one aspect, an optical frequency conversion system for generating a frequency-shifted replica of an input optical signal includes a phase modulation control signal generator and an optical phase modulator. The phase modulation control signal generator is coupled to receive the input optical signal and is operable to generate a phase modulation control signal characterized by a sequence of phase shift control portions synchronized to the input optical signal. The optical phase modulator is additionally coupled to receive the input optical signal and is operable to phase shift the input optical signal in accordance with the phase shift control portions of the phase modulation control signal to generate a frequency-converted replica of the input optical signal. An optical frequency conversion method for generating a frequency-shifted replica of an input optical signal also is is described.
    Type: Application
    Filed: April 15, 2003
    Publication date: January 15, 2004
    Inventors: You Kondoh, Norihide Yamada, Kenichi Abiko