Buried heterostucture device having integrated waveguide...

Details Buried heterostucture device having integrated waveguide... Buried heterostucture device having integrated waveguide...

2005-06-16

2008-10-21

Pak, Sung (Department: 2874)

Optical waveguides

Planar optical waveguide

C372S043010

Reexamination Certificate

active

07440666

ABSTRACT:
The device is an optoelectronic device or transparent waveguide device that comprises a growth surface, a growth mask, an optical waveguide core mesa and a cladding layer. The growth mask is located on the semiconductor surface and defines an elongate growth window having a periodic grating profile. The optical waveguide core mesa is located in the growth window and has a trapezoidal cross-sectional shape. The cladding layer covers the optical waveguide core mesa and extends over at least part of the growth mask. Such devices are fabricated by providing a wafer comprising a growth surface, growing an optical waveguide core mesa on the growth surface by micro-selective area growth at a first growth temperature and covering the optical waveguide core mesa with cladding material at a second growth temperature, lower than the first growth temperature.

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