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:
Oct. 15, 1991
Filed:
Jan. 29, 1990
Applicant:
Inventor:
Rolf Heidemann, Tamm, DE;
Assignee:
Alcatal N.V., Amsterdam, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04J / ;
U.S. Cl.
CPC ...
359125 ; 370 71 ;
Abstract
In optical communication systems for transmitting a plurality of broadband signals, particularly television signals, over an optical waveguide, the signals are modulated onto carriers of different frequencies, and the modulated carriers are transmitted as frequency-division-multiplex signals. The carrier frequencies lie in different frequency bands (B.sub.1, B.sub.2, B.sub.3) each of which is not more than one octave wide and which are spaced at least one octave apart. This makes it possible to adapt the system step by step to channel requirements using conventional, proven transmission equipment for the individual frequency bands.