Opto-electronic directional switch
CA 1284836 C · Owner: Linton, Richard S. · Inventors: Linton, Richard S.; White, Ian H.; Carroll, John E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An opto-electronic switch which shows a good signal rejection ratio between modes is also of particularly small dimensions. The switch comprises a semiconductor laser 1 having four contacts 12, 12', 13, 13' which provide gain guiding under two stripe windows 18, 19. By varying the bias currents supplied to the individual contacts 12 12', 13, 13', or by inputting optical control signals to the waveguiding channels under the stripe windows 18 19, different configurations of optical output from the laser 1 can be achieved. The two contacts, 12 12' and 13, 13', associated with each stripe window 18 19 are effectively, a single stripe contact with a discontinuity. It is thought that diffractive …
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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
- Granted June 11, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 11, 2008.
- 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.