Silica optical waveguide and method of manufacturing the same

Details Silica optical waveguide and method of manufacturing the same Silica optical waveguide and method of manufacturing the same

2007-10-23

2007-10-23

Font, Frank G. (Department: 2883)

Optical waveguides

Planar optical waveguide

Thin film optical waveguide

C385S129000, C385S130000, C385S141000, C385S144000

Reexamination Certificate

active

11061870

ABSTRACT:
The invention relates to a silica optical waveguide having a clad layer and a core formed from a silica material and a method of fabricating the same and provides a silica optical waveguide in which the position of a core can be easily recognized and a method of manufacturing the same. The waveguide has a lower clad layer formed from silicate glass on a silica substrate, a core formed from silicate glass on the lower clad layer, and an upper clad layer formed of silicate glass on the lower clad layer so as to embed the core. A difference of height is provided on a top surface of the upper clad layer such that a difference between reflections from the position of the core and from other positions can be recognized on the top surface of the upper clad layer.

REFERENCES:
patent: 5408569 (1995-04-01), Nishimoto
patent: 6044192 (2000-03-01), Grant et al.
patent: 6553170 (2003-04-01), Zhong et al.

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