Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1994-09-21
1995-04-18
Pascal, Leslie
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359113, H04B 1000
Patent
active
054083508
ABSTRACT:
This bidirectional transmission system, especially one using optical fiber, between a source terminal and a user terminal employing a single carrier for both transmission directions obtained from a source in the source terminal characterized in that it comprises for each transmission direction means for modulating one parameter of said carrier, this parameter being intensity for the two directions and subject in all cases to the condition that the modulation applied first for transmission in the downward direction from the source terminal to the user terminal the depth of modulation is sufficiently high to leave sufficient power for application of the second modulation to which that applied second can be applied for transmission in the upward direction from the user terminal to the source terminal.
REFERENCES:
patent: 3584220 (1971-06-01), Sadao Non
patent: 3943284 (1976-03-01), Nelson
patent: 3989942 (1976-11-01), Waddoups
patent: 4763326 (1988-08-01), Krick
patent: 4955086 (1990-09-01), Kindt
patent: 4956877 (1990-09-01), Kroll
patent: 5010586 (1991-04-01), Mortimore
Gautheron Olivier
Perrier Philippe
Alcatel Cit
Pascal Leslie
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