Interactive optical transmission system

Details Interactive optical transmission system Interactive optical transmission system

1993-04-07

1994-08-30

Chilcot, Jr., Richard E.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359173, 359154, 372 96, 372 38, H04B 1000, H01S 308

Patent

active

053433157

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).

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patent: 5020153 (1991-05-01), Choa et al.
Electronics Letters, vol. 28. No. 2, Jan. 16, 1992-M.sup.3 -Net: Demonstration Of HD WDM Optical Network Using Two-Electrode DFB-LD Filter As Tunable Narrowband FM Receiver-M. J. Chawki et al.
Electronics Letters, vol. 25, No. 9, Apr. 27, 1989-16-Channel Optical FDM Distribution/Transmission Experiment Utilising Multichannel Frequency Stabiliser And Waveguide Frequency Selection Switch.
Patent Abstracts of Japan, vol. 11, No. 245, E-531-2692 "Two-Way Optical Transmission System For Picture And Data" Mar. 16, 1987.
French Search Report-FR 9204848-FA 474784-Jan. 5, 1993.

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