Patents by Inventor Esmail Mehdizadeh

Esmail Mehdizadeh 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).

  • Linear cavity laser system for intracavity laser spectroscopy
    Patent number: 6028310
    Abstract: Contaminants are detected optically at concentrations below 100 part-per-million (ppm) and extending to a level approaching 1 part-per-trillion (ppt) by using intracavity laser spectroscopy (ILS) techniques. An optically-pumped solid-state laser (the ILS laser) is employed as a detector. The ILS laser comprises an ion-doped crystal medium contained in a linear laser cavity. A gas sample containing gaseous contaminant species is placed inside the laser cavity and on one side of the ion-doped crystal. The output signal from the ILS laser is detected and analyzed to identify the gaseous species (via its spectral signature). The concentration of the gaseous species can be determined from the spectral signature as well. One preferred embodiment of the present invention employs a linear cavity formed between two mirrors separated from the ion-doped crystal laser medium, wherein both ends of the ion-doped crystal are cut at Brewster's angle.
    Type: Grant
    Filed: November 17, 1997
    Date of Patent: February 22, 2000
    Assignee: Innovative Lasers Corporation
    Inventors: George H. Atkinson, Esmail Mehdizadeh, Jeffrey S. Pilgrim
  • Diode laser-pumped laser system for intracavity laser spectroscopy (ILS)
    Patent number: 5917188
    Abstract: Contaminants are detected optically at concentrations below 100 part-per-million (ppm) and extending to a level approaching 1 part-per-trillion (ppt) by using intracavity laser spectroscopy (ILS) techniques. A diode laser-pumped solid-state laser (the ILS laser) is employed as a detector. The ILS laser comprises an ion-doped crystal medium contained in a laser cavity optically pumped by a diode laser pump laser. A gas sample containing gaseous contaminant species is placed inside the laser cavity and on one side of the ion-doped crystal. The output signal from the ILS laser is detected and analyzed to identify the gaseous species (via its spectral signature). The concentration of the gaseous species can be determined from the spectral signature as well.
    Type: Grant
    Filed: April 17, 1998
    Date of Patent: June 29, 1999
    Assignee: Innovative Lasers Corporation
    Inventors: George H. Atkinson, Esmail Mehdizadeh, Jeffrey S. Pilgrim
  • Diode laser-pumped laser system for ultra-sensitive gas detection via intracavity laser spectroscopy (ILS)
    Patent number: 5747807
    Abstract: Contaminants are detected optically at concentrations below 1 part-per-million (ppm) and extending to a level approaching 1 part-per-trillion (ppt) by using intracavity laser spectroscopy (ILS) techniques. A diode laser-pumped solid-state laser (the ILS laser) is employed as a detector. The ILS laser comprises an ion-doped crystal medium contained in a laser cavity optically pumped by a diode laser pump laser. A gas sample containing gaseous contaminant species is placed inside the laser cavity and on one side of the ion-doped crystal. The output signal from the ILS laser is detected and analyzed to identify the gaseous species (via its spectral signature). The concentration of the gaseous species can be determined from the spectral signature as well. Advantageously, the diode laser pump laser is relatively small and compact in comparison to other sources of optical pumping.
    Type: Grant
    Filed: July 3, 1996
    Date of Patent: May 5, 1998
    Assignee: Innovative Lasers Coropration
    Inventors: George H. Atkinson, Esmail Mehdizadeh
  • Linear cavity laser system for ultra-sensitive gas detection via intracavity laser spectroscopy (ILS)
    Patent number: 5723864
    Abstract: Contaminants are detected optically at concentrations below 1 part-per-million (ppm) and extending to a level approaching 1 part-per-trillion (ppt) by using intracavity laser spectroscopy (ILS) techniques. An optically-pumped solid-state laser (the ILS laser) is employed as a detector. The ILS laser comprises an ion-doped crystal medium contained in a linear laser cavity which may be optically pumped by a diode laser pump laser. A gas sample containing gaseous contaminant species is placed inside the laser cavity and on one side of the ion-doped crystal. The output signal from the ILS laser is detected and analyzed to identify the gaseous species (via its spectral signature). The concentration of the gaseous species can be determined from the spectral signature as well. Advantageously, the linear cavity is relatively small and compact in comparison to other ILS systems.
    Type: Grant
    Filed: July 3, 1996
    Date of Patent: March 3, 1998
    Assignee: Innovative Lasers Corporation
    Inventors: George H. Atkinson, Esmail Mehdizadeh
  • Intracavity laser spectroscope for high sensitivity detection of contaminants
    Patent number: 5689334
    Abstract: Contaminants are detected optically at concentrations below 1 part-per-million (ppm) and extending to a level approaching 1 part-per-trillion (ppt) by using intracavity laser spectroscopy (ILS) techniques. A solid-state laser with an ion-doped crystal medium contained in an optical resonator cavity (the ILS laser) is employed as a detector. A gas sample containing gaseous contaminant species is placed inside the optical resonator cavity and on one side of the ion-doped crystal. The output signal from the ILS laser is detected and analyzed to identify the gaseous species. The concentration of the gaseous species can be determined as well.
    Type: Grant
    Filed: September 1, 1995
    Date of Patent: November 18, 1997
    Assignee: Innovative Lasers Corporation
    Inventors: George H. Atkinson, Yehoshua Kalisky, Jiamin Zhang, Max F. Hineman, Esmail Mehdizadeh, Markus Wolperdinger