Tunable raman laser and amplifier
CA 2428172 A1 · Owner: Putnam, Martin A. · Inventors: Kersey, Alan D.; Putnam, Martin A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tunable Raman (40) laser and amplifier include a pair of tunable optical units (42, 44) optically connected by a length of optical fiber (46) having an associated Raman gain. The tunable optical units (42 44) tune respective , optical waveguides (50 60), each of which includes an inner core (56) disposed within an outer cladding (58). A plurality of Bragg gratings (51-54 61-64) is written in each core (56) of the waveguides (50 60). The reflexion , wavelengths of each Bragg grating (51-54) of the input waveguide (50) is the same as the reflection wavelength of a matched grating of the output waveguide (60), to thereby form a plurality of cascaded resonance cavities. Each resonance …
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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 October 22, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 22, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 22, 2023.
- 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.