Optical device having optical waveguide and method for...

Details Optical device having optical waveguide and method for... Optical device having optical waveguide and method for...

2007-02-06

2007-02-06

Healy, Brian M. (Department: 2883)

Optical waveguides

With optical coupler

Particular coupling structure

C385S146000, C385S147000, C438S029000, C438S031000, C438S700000, C438S701000

Reexamination Certificate

active

11139540

ABSTRACT:
An optical device includes: a silicon substrate; a plurality of silicon oxide columns having a rectangular plan shape; and a cavity disposed between the columns. Each column has a lower portion disposed on the substrate. Each column has a width defined as W1.The cavity has a width defined as W2.A ratio of W1/W2becomes smaller as it goes to the lower portion of the column. A core layer provided by the columns and the cavity can have the thickness equal to or larger than a few dozen μm easily. Therefore, connection loss between a light source and the device is reduced.

REFERENCES:
patent: 5914760 (1999-06-01), Daiku
patent: 6277756 (2001-08-01), Ohara et al.
patent: 6630389 (2003-10-01), Shibata et al.
patent: 6757106 (2004-06-01), Kusuyama
patent: 6995907 (2006-02-01), Osawa et al.
patent: 2005/0002605 (2005-01-01), Sakai et al.
patent: 2005/0265662 (2005-12-01), Oohara et al.
patent: A-2002-341166 (2002-11-01), None

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