Output power monitoring in an optical preamplifier
CA 2408674 A1 · Owner: Domagala, Jerzy · Inventors: Schube, Scott A.; Domagala, Jerzy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Tapless output power monitoring is used when amplifying and converting an optical signal to an electrical signal e.g. in a communications receiver , of an optical transmission system. An optical preamplifier amplifies an intensity-modulated optical, input signal to produce an amplified intensity-modulated optical signal. An optical-to-, electrical (O-E) converter demodulates and converts the amplified intensitymodulated, optical signal into an electrical output signal. A current monitor monitors a DC bias, current of the optical-to-electrical (O-E) converter and produces a feedback signal, proportional to the DC bias current. The optical preamplifier adjusts the gain of the, amplified …
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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 16, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 16, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 16, 2024.
- 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.