Patents by Inventor Roberto Avallone

Roberto Avallone 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).

  • Optical transmission system with raman amplifiers comprising a supervisory system
    Patent number: 7274871
    Abstract: An optical transmission system having a supervisory system of devices disposed along an optical link. Counter-propagating Raman amplifiers are disposed along the optical link. Low-frequency supervisory signals are superimposed on the optical signals traveling on the optical link by suitable modulators in the devices disposed along the line. Counter-propagating Raman amplifiers amplify optical signals and do not introduce a substantial amount of attenuation on the low-frequency supervisory signals.
    Type: Grant
    Filed: December 27, 2001
    Date of Patent: September 25, 2007
    Assignee: Alcatel
    Inventors: Roberto Avallone, Andrea Fregosi, Carlo Boidi
  • Optical transmission system with raman amplifiers comprising a supervisory system
    Patent number: 7254326
    Abstract: An optical transmission system having a supervisory system of devices disposed along an optical link. Co-propagating Raman amplifiers are disposed along the optical link. Low frequency supervisory signals are superimposed on the optical signals traveling on the optical link by suitable modulators in the devices disposed along the line or by the same co-propagating Raman amplifiers. Regeneration of the supervisory signal is provided in at least one device disposed along the optical link in order to counteract attenuation introduced on the supervisory signal by the co-propagating Raman amplifiers.
    Type: Grant
    Filed: December 27, 2001
    Date of Patent: August 7, 2007
    Assignee: Alcatel
    Inventors: Roberto Avallone, Andrea Fregosi
  • Optical transmission system with raman amplifiers comprising a supervisory system
    Publication number: 20050117839
    Abstract: An optical transmission system having a supervisory system of devices disposed along an optical link. Co-propagating Raman amplifiers are disposed along the optical link. Low frequency supervisory signals are superimposed on the optical signals traveling on the optical link by suitable modulators in the devices disposed along the line or by the same co-propagating Raman amplifiers. Regeneration of the supervisory signal is provided in at least one device disposed along the optical link in order to counteract attenuation introduced on the supervisory signal by the co-propagating Raman amplifiers.
    Type: Application
    Filed: December 27, 2001
    Publication date: June 2, 2005
    Inventors: Roberto Avallone, Andrea Fregosi
  • Optical transmission system with raman amplifiers comprising a supervisory system
    Publication number: 20050078351
    Abstract: An optical transmission system having a supervisory system of devices disposed along an optical link. Counter-propagating Raman amplifiers are disposed along the optical link. Low-frequency supervisory signals are superimposed on the optical signals traveling on the optical link by suitable modulators in the devices disposed along the line. Counter-propagating Raman amplifiers amplify optical signals and do not introduce a substantial amount of attenuation on the low-frequency supervisory signals.
    Type: Application
    Filed: December 27, 2001
    Publication date: April 14, 2005
    Inventors: Roberto Avallone, Andrea Fregosi, Carlo Boidi