Optical: systems and elements – Optical amplifier – Raman or brillouin process
Reexamination Certificate
2006-10-03
2006-10-03
Keith, Jack (Department: 3663)
Optical: systems and elements
Optical amplifier
Raman or brillouin process
C359S337000
Reexamination Certificate
active
07116470
ABSTRACT:
The invention is dealing with a Raman amplifying device comprising an optical path, pump sources for generating a plurality of Raman pump signals and means for coupling the plurality of Raman pump signals into the optical path for backward pumping. The plurality of optical Raman pump signals are time-division multiplexed by multiplexing controlling means and the controlling means apply a modulation frequency beyond the corner frequency of the co-propagating modulation transfer function. The method to modulate the time division multiplexed Raman signal gives a condition to avoid the increase of double Rayleigh scattering noise.
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Martinelli Catherine
Mongardien Dominique
Alcatel
Diacou Ari M.
Keith Jack
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