The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 30, 1994
Filed:
Apr. 07, 1993
Abstract
An interactive optical transmission system including a transmitter assembly (EE) with a FSK DFB laser (10) and a receiver assembly (ER) having the same type of DFB laser (20) and functioning as a photoreceiver. In order to make this system interactive, the receiver (ER) is provided with a channel selection circuit (40) able to supply a current which will place the laser (20) of the receiver assembly (ER) well above the threshold and make it function as an amplitude shift keyed transmitter. The beam transmitted by said laser (20) will raise the optical transmission line (FO) to the transmitter assembly (EE). An amplitude demodulation (48) will make it possible to restore the selection code and control the appropriate information channel (S).