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US 2003/0117697 A1Published application
Pumping source with a number of pumping lasers for the Raman amplification of a WDM signal with minimized four-wave mixing
AssigneeSiemens Aktiengesellschaft
InventorPeter Krummrich
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Abstract
A pumping source is provided for the Raman amplification of an optical wavelength division multiplex signal, wherein the pumping source has a number of pumping lasers with, in each case, different pumping wavelengths. Modules for the angle and/or amplitude modulation of pumping signals of the pumping lasers are connected to the pumping lasers, such that by appropriate adaptation of the modulation of the pumping signals mixing products from four-wave mixing between the pumping signals are suppressed.
Claims10
A pumping source for Raman amplification of a wavelength division multiplex signal transmitted over a fiber, comprising:
- a plurality of pumping lasers for generating pumping signals with respectively different pumping wavelengths;
- a launching device for launching the pumping signals into the fiber;
- and
- a plurality of modules connected to at least some of the pumping lasers for at least one of angle modulation and amplitude modulation of the respective pumping signals.
1 more element
Dependencies are inferred from the claim text.