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:
May. 29, 2001
Filed:
Sep. 22, 1998
Applicant:
Inventors:
Carl Michael Weinert, Berlin, DE;
Helmut Heidrich, Berlin, DE;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/14 ; G02B 6/30 ;
U.S. Cl.
CPC ...
G02B 6/14 ; G02B 6/30 ;
Abstract
In an integrated structure of a beam spread transformer with several buffer layers separated from each other by light guiding layers there is provided on the upper buffer layer an unclad rib waveguide with a tapered section. Between the fiber-facing interface and the tapered section there is provided a section over which the rib is extending. There, the waveguiding layer is completely removed and the exposed buffer layer is reduced symmetrically to a width which is greater than the width of the rib. By the additional rib thus formed coupling independent of polarization is made possible. The coupling is optimized by increasing layer thicknesses of the buffer layers.