Spot-size transformer, method of producing spot-size...

Details Spot-size transformer, method of producing spot-size... Spot-size transformer, method of producing spot-size...

2007-05-22

2007-05-22

Font, Frank G. (Department: 2883)

Optical waveguides

With optical coupler

Particular coupling structure

C385S129000, C385S130000, C385S131000, C385S132000

Reexamination Certificate

active

10678981

ABSTRACT:
The present invention is to provide a spot-size transformer which can transform the beam spot-size in a waveguide separated by a groove and a waveguide-embedded optical circuit using the spot-size transformer.The spot-size transformer according to the present invention comprises a first optical waveguide having a first core and a first cladding covering substantially the whole surface of the first core, a second optical waveguide having a second core provided as an extension of the first cladding and a second cladding, a transition waveguide positioned between the first and second optical waveguides, the transition waveguide having a first core whose width of the extension becomes gradually narrower as it goes toward the second optical waveguide.

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