Patents Assigned to SIP - Societa Italiana per L-Esbercizio Delle Telecommunicazioni P.A.
  • Fabricating strip waveguides by consolidating a rare-earth-doped layer with a laser
    Patent number: 5411565
    Abstract: In order to fabricate strip monomode active optical waveguides for optical elecommunications, a layer of vitreous soot is deposited on a substrate and is impregnated with a solution of a precursor of a rare-earth dopant, and a radiation with a wavelength comprised in an absorption band of the dopant is moved along the soot, along a trajectory corresponding to the geometrical shape desired for the guide, thereby forming a vitrified strip.
    Type: Grant
    Filed: August 6, 1993
    Date of Patent: May 2, 1995
    Assignees: SIP - Societa Italiana per L-Esbercizio Delle Telecommunicazioni P.A., Sirti S.p.A.
    Inventors: Livio Cognolato, Angelantonio Gnazzo