SILICON NANOTAPER COUPLERS AND MODE-MATCHING DEVICES

Title:

SILICON NANOTAPER COUPLERS AND MODE-MATCHING DEVICES

Document Type and Number:

WIPO Patent Application WO2005077110

Kind Code:

A3

Abstract:

An optical coupling arrangement including an ultrathin silicon waveguide (18) formed in an upper silicon layer (14) of a silicon-on-insulator (SOI) structure and a silicon nanotaper structure (16) formed in the upper silicon layer and coupled to the ultrathin silicon waveguide. A dielectric waveguide coupling layer (24), with a refractive index greater than that of the dielectric insulating layer but less than that of silicon, overlies a portion of the dielectric insulating layer (12) where an associated portion of the SOI layer has been removed. An end portion of the dielectric waveguide coupling layer overlaps an end section of the silicon nanotaper to form a mode conversion region (26). A free-space optical coupling arrangement (such as a prism (24) or grating) is disposed over the dielectric waveguide coupling layer and used to couple a propagating free space signal to the dielectric waveguide coupling layer and thereafter into the ultrathin silicon waveguide.

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Inventors:

GHIRON MARGARET (US)
GOTHOSKAR PRAKASH (US)
MONTGOMERY ROBERT KEITH (US)
PATEL VIPULKUMAR (US)
PATHAK SOHAM (US)
SHASTRI KALPENDU (US)
YANUSHEFSKI KATHERINE A (US)

Application Number:

PCT/US2005/004507

Publication Date:

December 01, 2005

Filing Date:

February 10, 2005

Export Citation:

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Assignee:

SIOPTICAL INC (US)
GHIRON MARGARET (US)
GOTHOSKAR PRAKASH (US)
MONTGOMERY ROBERT KEITH (US)
PATEL VIPULKUMAR (US)
PATHAK SOHAM (US)
SHASTRI KALPENDU (US)
YANUSHEFSKI KATHERINE A (US)

International Classes:

G02B6/122; G02B6/14; G02B6/26; G02B6/34; G02B6/42; (IPC1-7): G02B6/14; G02B6/34

Foreign References:

US20040057667A1	2004-03-25
US20030044118A1	2003-03-06
US20030039430A1	2003-02-27

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