Active energy control for diode pumped laser systems using pulsewidth modulation
CA 2113846 C · Owner: Nielsen, Keith E. · Inventors: Nielsen, Keith E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An active energy control circuit and method employing pulsewidth modulation for use with diode pumped laser systems. The active energy control circuit and method employs optical energy feedback sensing and output control of the electrical pulsewidth to pump diodes of the laser system. This creates an active energy control loop for maintaining diode pumped laser output energy at a desired level over different pulse repetition frequencies, time, and environmental conditions. The diode pumped laser output energy is controlled by varying the pulsewidth of the output energy pulse while maintaining a current amplitude set point. By using a pulsewidth-modulation-based control system, the current …
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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 January 20, 1994 and granted March 16, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 20, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 20, 2016.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.