Quasi-monolithic saturable optical element
CA 2116714 C · Owner: Hughes Aircraft Company · Inventors: Sumida, David S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Saturable absorption, polarization, and retroreflection are integrated into a single solid-state optical element (10). The optical element (10) comprises an undoped substrate (14) having front and rear surfaces disposed at a predetermined angle. A dielectric coating (15) is disposed on the rear surface of the substrate (14) and at least, one saturable absorber platelet (11) is disposed on the front surface of the substrate (14). The saturable absorbing species used in the platelet(s) (11) are either F2- color-centers in lithium fluoride or Cr4+ dopant ions in one of several suitable host optical materials. Linear polarization of the laser beam (13a) is achieved by orienting the input face …
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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 1, 1994 and granted December 16, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 1, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 1, 2016.
- 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.