Diode-pumped laser system using uranium-doped q-switch
CA 2195597 C · Owner: He Holdings, Inc. · Inventors: Sumida, David S.; Birnbaum, Milton; Stultz, Robert D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A laser system (20) includes a laser resonator cavity (22) having a resonant path (46) and an Er,Yb:glass lasing element (28) with an output of from about 1.5 to about 1.6 micrometers within the laser resonator cavity (22). A diode array (32) optically pumps the lasing element (28) to emit light. A Q-switch (44) lies along the resonant path (46) within the laser resonator cavity (22). The Q-switch (44) is formed of a host material having a concentration of uranium ions therein, so as to be a saturable absorber of the light emitted by the lasing element (28). The Q-switch (44) is preferably a uranium-doped fluoride such as U:CaF2, U:SrF2, or U:BaF2.
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
- Filed January 21, 1997 and granted March 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 21, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 21, 2019.
- 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.