The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 09, 2013
Filed:
Feb. 29, 2008
Luciano Socci, Milan, IT;
Lorenzo Bolla, Milan, IT;
Paola Galli, Milan, IT;
Marco Romagnoli, Milan, IT;
Silvia Ghidini, Milan, IT;
Luciano Socci, Milan, IT;
Lorenzo Bolla, Milan, IT;
Paola Galli, Milan, IT;
Marco Romagnoli, Milan, IT;
Silvia Ghidini, Milan, IT;
Google Inc., Mountain View, CA (US);
Abstract
An optical mode transformer comprises a first waveguide including a first core, a first cladding and an end facet configured to be coupled to an optical fiber. A second waveguide comprises a second core and a second cladding, and is arranged with respect to the first waveguide so as to realize an evanescent optical coupling with the first waveguide. The second core comprises a tapered region, in at least a portion of which the evanescent coupling takes place. The first core and the second core are separated by a gap. A first refractive index contrast of the first waveguide is less than a second refractive index contrast of the second waveguide.