Frequency and output regulation in laser diodes
CA 1232326 A · Owner: Rislund, Sten H. · Inventors: Rislund, Sten H.; Hallberg, Bengt O.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is a regulator circuit for combined regulation of the emitted wavelength from a laser diode and its output. According to the invention a fraction of the radiation from the laser diode (1) is caused to be transmitted, via a glass fibre (2) to a sensor unit (8). The sensor unit contains a dispersing device (3) possibly, separate focussing devices, and a detector unit (4). The detector unit (4) contains one or more detector elements whose electrical output, signals are conducted to a signal decoding unit (5). The signal decoding unit (5) is connected (i) to a temperature generator (6) in turn conn-, ected by thermal means to the laser diode (ii) to a power generator (7), …
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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
- Granted February 2, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 2, 2005.
- 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.