Method and apparatus for achieving flat broadband Raman gain
AssigneeLucent Technologies Inc.
InventorXiang Liu
Life of this patent
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Abstract
A method and apparatus for receiving a gain profile from optical channel monitors (OMONs) and using that gain profile along with additional system parameters received from the OMONs for calculating the needed Raman pump parameters (power and/or wavelength) and adjusting the Raman pumps to those calculated parameters for achieving any pre-determined broadband signal gain or power profile. The calculated Raman pump parameters are scaled to be within a range of predetermined acceptable values.
Claims24
A method, comprising:
- determining a signal gain profile of a Raman-pumped WDM system;
- and
- in response to a difference between said determined output gain profile and a desired output gain profile, adapting at least one Raman pump in a manner causing said difference to be reduced.
Apparatus for use in a wavelength-division-multiplexed (WDM) system, said apparatus comprising a memory for storing program instructions and a processor for executing said instructions to configure the apparatus to perform the steps of:
- determining a signal gain profile of a Raman-pumped WDM system;
- and
- in response to a difference between said determined output gain profile and a desired output gain profile, adapting at least one Raman pump in a manner causing said difference to be reduced.
A Raman-pumped WDM system, comprising:
- at least one amplifying fiber;
- at least one Raman pump, for pumping said amplifying fiber;
- and
- at least one optical channel monitor, for measuring an output gain profile of said Raman-pumped WDM system;
- wherein
- at least one of said at least one Raman pumps is adapted in response to a difference between said measured output gain profile and a desired output gain profile such that said difference is reduced.
Dependencies are inferred from the claim text.