WDM optical fiber system using Raman amplification
AssigneeLucent Technologies Inc.
InventorsAndrew R. Chraplyvy, Fabrizio Forghieri, Robert William Tkach
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Abstract
Pump depletion modulation crosstalk between WDM channels in Raman amplified systems is virtually eliminated by exclusive use of backward pumping.
Claims10
Non-soliton, light amplified, wavelength division multiplexed (WDM) optical waveguide system comprising an amplifier span of optical fiber including a fiber amplifier, means for introducing at least one set of WDM signal channels into the amplifier span in the transmission direction, and means for pumping the amplifier whereby signals are simultaneously amplified, in which amplification is primarily the consequence of stimulated Raman scattering (SRS),
- CHARACTERIZED IN THAT
- pumping is solely in the direction counter to the transmission direction whereby Pump Depletion Modulation is reduced relative to systems which do not completely forgo pumping in the transmission direction.
Dependencies are inferred from the claim text.