Optical add-drop module with low loss and high isolation
CA 2310972 A1 · Owner: Lucent Technologies Inc. · Inventors: Broberg, Robert Mario; Adams, Laura Ellen; Lenz, Gadi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical add-drop module (OADM) includes in the through-path exactly two thin-film filters (TFFs) having respective passbands that approximately coincide, in wavelength. Each TFF has a respective across-the-band isolation level representing the smallest isolation achieved at and wavelength within the passband. The respective reflection characteristic curves of the two TFFs are at least partially, complementary, such that the OADM isolation level exceeds the logarithmic sum of, the across-the-band isolation levels of the respective TFFs.
Read the whole patent
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 5, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 5, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 5, 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.