Patents by Inventor Andre Crotrau

Andre Crotrau 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).

  • MULTI-CLADDING FIBER
    Publication number: 20110081123
    Abstract: Multi-cladding optical fibers to be used in the context of fiber amplifiers and fiber lasers are described herein. Embodiments of optical fibers include a rare-earth doped core into which the signal field is to be amplified. The doped core is surrounded by multiple claddings that guide the pump field to be absorbed by the reactive core material. The first cladding has a depressed refractive index to improve high-order mode bending losses without incurring significant fundamental mode bending losses.
    Type: Application
    Filed: January 17, 2008
    Publication date: April 7, 2011
    Applicant: INSTITUT NATIONAL D'OPTIQUE
    Inventors: Claude Pare, Pierre Laperle, Huimin Zheng, Andre Crotrau