Optical fiber transmission system with compensation for line dis

Details Optical fiber transmission system with compensation for line dis Optical fiber transmission system with compensation for line dis

1994-06-30

1996-07-02

Boudreau, Leo

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359173, 359179, 385122, H04B 1000

Patent

active

055328610

ABSTRACT:
A system for transmission of a digital signal on a transmission line with an optical on-line amplification. The transmission line is formed by a plurality of optical fiber sections and a plurality of optical amplifiers. Each of the optical amplifier is interposed between two adjacent optical fiber sections. The system includes at least one device for on-line compensation of the distortions induced in the digital signal, notably by the noise and the propagation on the transmission line. The on-line compensation device includes at least one bandpass optical filter having a passband whose value is substantially lower than that of the passband of the digital signal before transmission, and at least one saturable absorbent element that is a non-linear passive optical element having an absorption that depends decreasely on the optical power.

REFERENCES:
patent: 5035481 (1991-07-01), Mollenauer
patent: 5243613 (1993-09-01), Gysel et al.
patent: 5355240 (1994-10-01), Prigent et al.
patent: 5357364 (1994-10-01), Gordon et al.
"Nonlinear Fiber Optics", Quantum Electron, by Govind Agrawal.
"Nonlinear Effects in Optical Fibres and Fibre Devices", IEE Proceedings, vol. 134, Pt. J. No. 3, Jun. 1987.
"Recent Research and Development Activities on Optical Submarine Cable Systems Using Optical Amplifiers at KDD", L'Onde Electrique, Mar.-Apr. 1993, vol. 73, pp. 15-23.

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