Electro-optic device
CA 1320753 C · Owner: Shaw, Robert N. · Inventors: Shaw, Robert N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In electro-optic waveguides devices such as directional couplers and Mach-Zehnder interferometers having travelling-wave electrodes which overlie the waveguides temperature sensitivity is reduced by arranging the ground plane electrode to overlie only part of the width of its associated waveguide portion. The invention has particular application to z-cut lithium niobate. Figure 2.
Read the whole patent
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 July 27, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 27, 2010.
- 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.