Optical communication systems

Details Optical communication systems Optical communication systems

2000-07-27

2004-01-20

Pascal, Leslie (Department: 2633)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C359S199200, C359S337000, C359S341430

Reexamination Certificate

active

06680787

ABSTRACT:

1. FIELD OF THE INVENTION
2. Back Ground of Related Art
This relates to optical communication systems and finds particular application to optical communication systems for long distance operation or trans-oceanic applications.
Currently a great deal of work is being done on soliton propagation for such above mentioned systems. However, such soliton systems suffer from Gordon-Haus timing jitter. Return-to-zero (RZ) pulses are desired as they are compatible with the all-optical processing technologies envisaged for switching nodes and routing devices.
SUMMARY OF THE INVENTION
We have found that RZ pulse propagation may be advantageously employed where the average dispersion is near zero in a single amplifier span, thus reducing the timing jitter, with the use of a saturable absorber to maintain the pulse shape.
According to the present invention there is provided a return-to-zero pulse optical communication system including fast saturable absorber means with propagation near the average dispersion zero wavelength.


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