Method and apparatus for stimulating a laser diode in a fiber optic transmitter
CA 2136987 C · Owner: Finisar Corporation · Inventors: Levinson, Frank H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fiber optic transmitter circuit (10) includes a DC bias circuit (12) that produces a DC voltage, an amplifier circuit (U1) having data signal inputs and that produces a data signal and wherein the data signal and the DC voltage are supplied to a laser diode (U2) to stimulate the diode (U2) to produce light of a corresponding nature. The amplifier (U1) is selected so that the inherent noise level or noise figure characteristics of the amplifier are such as to provide stimulation of a single mode laser diode in the frequency band wherein the resonant frequency of the laser diode is typically found. The resulting impact of the noise on the laser diode is to transform the single mode …
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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 June 1, 1993 and granted November 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 1, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 1, 2015.
- 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
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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.