Semiconductor optical device

Details Semiconductor optical device Semiconductor optical device

1995-10-13

1998-04-07

Ngo, John

Optical waveguides

Planar optical waveguide

Thin film optical waveguide

385132, G02B 610

Patent

active

057374740

ABSTRACT:
A semiconductor optical device is provided which includes a semiconductor substrate, a first core layer disposed on the substrate with a second core layer being interposed between the substrate and the first core layer. The second core layer has a lower refractive index than that of the first core layer. A ridge-shaped optical waveguide region is formed in a top surface of the first core layer. The width of the ridge-shaped optical waveguide is modulated along a direction which coincides with an optical axis of the semiconductor optical device. Further, the width of a bottom surface of the ridge-shaped optical waveguide is selected not to be greater than 4 .mu.m over a whole length thereof.

REFERENCES:
patent: Re31806 (1985-01-01), Scifres et al.
patent: 5555544 (1996-09-01), Walpole et al.
The Autumn Conference of the Institute of Electronics, Information and Communication Engineers of Japan, C-303, Sep., 1994 Optics Letters, vol. 16, No. 5, pp. 306-308 (1991).

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