Patents by Inventor Shubhagat Gangopadhyay

Shubhagat Gangopadhyay 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).

  • Field serviceable laser pen for optical disk drives
    Patent number: 6781941
    Abstract: A laser source is located in a relatively cool accessible location. Because there is adequate heat dissipation for the laser source, changes in the laser wavelength that arise from laser temperature changes are minimized. The invention described here includes the use of optical fiber to deliver light from the laser source. The laser reliability is improved because of reduced temperature and temperature fluctuations are experienced by the laser source. Because the laser source can be placed outside the drives hermetic seal, the laser can be easily replaced in the field, if required.
    Type: Grant
    Filed: July 21, 1999
    Date of Patent: August 24, 2004
    Assignee: Seagate Technology LLC
    Inventors: Ronald E. Gerber, George R. Gray, Edward C. Gage, Shubhagat Gangopadhyay
  • Polarization controlling optics in fiber collimator assemblies
    Patent number: 6707965
    Abstract: A fiber collimator device includes polarization controlling optics to simplify the manufacture of fiber collimators that use polarization maintaining fiber. In particular, the use of the polarization control optics in a fiber collimator reduces the need to align the polarization axis of the polarization maintaining fiber, thus reducing the time spent on fabricating the device. This is useful where the collimation device includes a polarization mode combiner.
    Type: Grant
    Filed: May 1, 2002
    Date of Patent: March 16, 2004
    Assignee: ADC Telecommunications, Inc.
    Inventors: Ronald E. Gerber, Shubhagat Gangopadhyay
  • Polarization controlling optics in fiber collimator assemblies
    Publication number: 20030206695
    Abstract: A fiber collimator device includes polarization controlling optics to simplify the manufacture of fiber collimators that use polarization maintaining fiber. In particular, the use of the polarization control optics in a fiber collimator reduces the need to align the polarization axis of the polarization maintaining fiber, thus reducing the time spent on fabricating the device. This is useful where the collimation device includes a polarization mode combiner.
    Type: Application
    Filed: May 1, 2002
    Publication date: November 6, 2003
    Applicant: ADC Telecommunications, Inc.
    Inventors: Ronald E. Gerber, Shubhagat Gangopadhyay