Patents by Inventor Olivier Delwal

Olivier Delwal 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 fiber preform and method for manufacturing such optical fiber preform from a primary preform
    Patent number: 11046608
    Abstract: The invention relates to an optical fiber preform (20) comprising a primary preform (21) and one or more purified silica-based overclad layers (22) surrounding said primary preform (21), the purified silica-based overclad layers (22) comprising lithium and aluminium, and having a ratio between lithium concentration [Li] and aluminium concentration [Al] satisfying the following inequality: 1×10?3?[Li]/[Al]?20×10?3.
    Type: Grant
    Filed: August 13, 2013
    Date of Patent: June 29, 2021
    Assignee: DRAKA COMTEQ BV
    Inventors: Cédric Gonnet, Emmanuel Petitfrere, Laurent Calvo, Olivier Delwal
  • OPTICAL FIBER PREFORM AND METHOD FOR MANUFACTURING SUCH OPTICAL FIBER PREFORM FROM A PRIMARY PREFORM
    Publication number: 20160185649
    Abstract: The invention relates to an optical fiber preform (20) comprising a primary preform (21) and one or more purified silica-based overclad layers (22) surrounding said primary preform (21), the purified silica-based overclad layers (22) comprising lithium and aluminium, and having a ratio between lithium concentration [Li] and aluminium concentration [Al] satisfying the following inequality (Formula (I)). 1.103?[Li]/[Al]?20.
    Type: Application
    Filed: August 13, 2013
    Publication date: June 30, 2016
    Applicant: DRAKA COMTEQ BV
    Inventors: Cédric Gonnet, Emmanuel Petitfrere, Laurent Calvo, Olivier Delwal