Method of fabricating optical nonlinear thin film waveguide and optical nonlinear thin film waveguide
CA 2321744 C · Owner: Toyota School Foundation · Inventors: Fujiwara, Takumi; Ikushima, Akira; Komeda, Osamu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A Ge-added SiO2 thin film (12) is formed on a glass substrate (10) and a , metal film (14) is formed thereon (S11 to S13). By etching the metal film (14), a pair of electrodes (14a, 14b) mutually opposed at a predetermined interval is formed (S14). An insulating thin film (16) is formed on the insulating film (12) and the electrodes (14a 14b) (S15). While applying , ultraviolet radiation a high voltage is applied between the electrodes (14a 14b) to perform ultraviolet excitement polling to impart an optical nonlinearity to a channel region (18) (S16). By controlling the voltage application to the channel region (18) having the optical nonlinearity the , light transmitted through the …
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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 February 23, 1999 and granted April 15, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 23, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 23, 2021.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.