Optical telecommunication method providing a transmitting and re

Details Optical telecommunication method providing a transmitting and re Optical telecommunication method providing a transmitting and re

1996-03-20

2000-03-14

Bacares, Rafael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359158, 370503, 370540, H04B 1000

Patent

active

060380470

ABSTRACT:
A digital optical telecommunication method including the steps of: generating a digital modulated optical signal in an optical transmitting station, which signal corresponds to a first electric input signal carrying a piece of information; feeding the modulated optical signal to an optical-fiber line; receiving the modulated optical signal transmitted from the optical-fiber line at an optical receiving station, converting it to an electric form and thereat generating a second digital electric signal; wherein the modulated optical signal is coded in a sequence of elementary information units at a first frequency and wherein the step of generating a second digital electric signal comprises detecting in said converted signal, an electric signal having a second frequency higher than the first frequency and recognizing in said detected signal, the phase of an electric signal at the first frequency by comparing a received sequence of elementary information units with at least one reference sequence and verifying their correspondence to a predetermined condition.

REFERENCES:
patent: 4651320 (1987-03-01), Thapar
patent: 4905218 (1990-02-01), Takeuchi et al.
patent: 5113459 (1992-05-01), Grasso et al.
patent: 5398129 (1995-03-01), Reimann
patent: 5633742 (1997-05-01), Shipley
patent: 5719874 (1998-02-01), Heidemann et al.
Patent Abstracts of Japan vol. 015, No. 319 (E-1100).
Journal of Lightwave Technology, vol. 11, No. 1, Jan. 1, 1993 pp. 76-81.

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