Patents by Inventor Guangzhi G. Zhang

Guangzhi G. Zhang 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).

  • External cavity laser with dispersion compensation for mode-hop-free tuning
    Patent number: 6940879
    Abstract: A tunable external cavity laser equipped with an optical path length compensator for adjusting an optical path length of the cavity, a wavelength selector for selecting an operating wavelength of the light in a single longitudinal mode and a dispersion compensator for compensating a dispersion of the light. In order to achieve mode-hop-free tuning the laser has a synchronizer for synchronizing the optical path length compensator, the wavelength selector and the dispersion compensator to maintain the light in the selected single longitudinal mode while the wavelength selector tunes the operating wavelength. The laser employs a pair of prisms and a wedge filter or a gap filter to perform the functions of the optical path length compensator, the wavelength selector and the dispersion compensator.
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: September 6, 2005
    Assignee: New Focus, Inc.
    Inventor: Guangzhi G. Zhang
  • External cavity laser with dispersion compensation for mode-hop-free tuning
    Publication number: 20040109487
    Abstract: A tunable external cavity laser equipped with an optical path length compensator for adjusting an optical path length of the cavity, a wavelength selector for selecting an operating wavelength of the light in a single longitudinal mode and a dispersion compensator for compensating a dispersion of the light. In order to achieve mode-hop-free tuning the laser has a synchronizer for synchronizing the optical path length compensator, the wavelength selector and the dispersion compensator to maintain the light in the selected single longitudinal mode while the wavelength selector tunes the operating wavelength. The laser employs a pair of prisms and a wedge filter or a gap filter to perform the functions of the optical path length compensator, the wavelength selector and the dispersion compensator.
    Type: Application
    Filed: December 6, 2002
    Publication date: June 10, 2004
    Inventor: Guangzhi G. Zhang