Optical coupler optically coupling a light beam of a semiconduct

Details Optical coupler optically coupling a light beam of a semiconduct Optical coupler optically coupling a light beam of a semiconduct

1998-05-12

2000-08-29

Palmer, Phan T. H.

Optical waveguides

With optical coupler

Particular coupling structure

385 49, 385 52, 385124, 385130, 385143, 385145, G02B 626

Patent

active

061120022

ABSTRACT:
A semiconductor laser and an optical waveguide of an optical coupler, formed on a substrate are optically coupled with each other by aligning their positions horizontally by using a plurality of laser elements and cores for the laser and the waveguide respectively and arranging them in an array respectively so that a difference between their pitches is less than double of tolerance tolerated for optically coupling with each other, the waveguide having partially a composite core composed of: a main core; a sub core surrounding the main core and having a refractive index lower than that of the main core; and a cladding layer surrounding the sub core and having a refractive index lower than that of the sub core.

REFERENCES:
patent: 5857049 (1999-01-01), Beranek et al.
patent: 5909524 (1999-06-01), Tabuchi

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