Laser diode element with excellent intermodulation distortion characteristic
CA 2210008 C · Owner: Okuda, Tetsuro · Inventors: Okuda, Tetsuro; Yamada, Hirohito; Torikai, Toshitaka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a laser diode element including a front facet a, rear facet, a laser cavity formed between the front and rear facets and which has a predetermined length L and an active layer and a uniforming grating having regular corrugation formed in the direction of the laser cavity and which are coupled to each other at a predetermined coupling constant K. The partial grating divides the laser cavity into a short length side and a long length side and is interposed between the short length side and the long length side.
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 January 7, 1994 and granted August 7, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 7, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 7, 2016.
- 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.