Patent · US Active

Optical element and method for its manufacture

US8165430B2 · kind B2 · utility

0Cited by

22References

14Claims

0Family size

Assignee

Forschungszentrum Karlsruhe GmbH · DE

Inventors

Timo Mappes · Karlsruhe, DE
Christoph Vannahme · Rudegård, DK
Mauno Schelb · Karlsruhe, DE

Key dates

Filing date	Aug 12, 2009
Grant date	Apr 24, 2012
Priority date	—
Expiry date	Jun 9, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH01S2301/18
WIPO fieldOptics
WIPO sectorInstruments

Abstract

An optical element includes a substrate having a passive waveguide and a laser waveguide disposed therein. The laser waveguide is in direct contact with the passive waveguide over a surface of contact so as to provide a butt coupling between the passive waveguide and the laser waveguide. A step extends between an upper edge of the passive waveguide and an upper edge of the laser waveguide. A covering is disposed on the passive waveguide so that the covering and the substrate together provide a cladding of lower refractive index around the passive waveguide and so that a hollow space is disposed between a lower edge of the covering and the upper edge of the laser waveguide.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.