Semiconductor optical devices
CA 2341107 A1 · Owner: Agere Systems Optoelectronics Guardian Corporation · Inventors: Alam, Muhammad Ashraful; Eng, Julie; Ketelsen, Leonard Jan-Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is a semiconductor optical device and a method of manufacture. The device (10) includes a first waveguide (15) having an edge (31) and a , second, waveguide (12) adjacent to at least a portion of the first waveguide including the edge so, that light is coupled from the first to the second waveguide. The second waveguide has a, modal index which is essentially constant at least at the edge of the first waveguide. The, method includes forming at least the second waveguide by Selective Area Growth (SAG), using oxide pads (61, 62) of a particular geometry to achieve the essentially constant, modal index. In one embodiment the device is an expanded beam laser with an …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed March 21, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 21, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 21, 2023.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.