Single etalon optical wavelength reference device
CA 2381662 A1 · Owner: Mccallion, Kevin · Inventors: Watterson, Reich; Mccallion, Kevin; Tayebati, Parviz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compact wavelength monitoring and control assembly (10) for a narrow band (i.e. laser) source (12) is provided comprising a narrow bandpass wavelength , selective transmission filter element (18) of Fabry-Perot etalon structure , (18) through which two collimated beams from a laser source (12) are directed onto two closely spaced photodetectors (22 20). For wavelength stabilization, the differential output of the two photodetectors (22 20) is used in a , feedback loop (28) to stabilize the wavelength of the laser source (12) to the desired wavelength. Through the dependence of the wavelength transmission of the Fabry-Perot etalon (18) on angle and physical parameters (i.e. refractive …
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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 August 10, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 10, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 10, 2022.
- 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.