Dynamic optical spectral control scheme for optical amplifier sites
AssigneePTS Corporation
InventorsLacra Pavel, Andrew Robinson
Life of this patent
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Abstract
A method for dynamically compensating for signal loss and dispersion in an optical signal traversing though an optical network. The method includes providing a dynamic gain equalization filter (DGEQ) having a dynamically adjustable transfer function, and providing a first optical amplifier and a second optical amplifier interconnected by the DGEQ to form a dynamic amplifier site in the optical network. The method further includes controlling spectral power profile of the optical signal at an output of the dynamic amplifier site by dynamically adjusting a transfer function associated with the DGEQ.
Claims23
A method of dynamically compensating for signal loss and dispersion in an optical signal traversing though an optical network;
- comprising:
- providing a dynamic gain equalization filter (DGEQ) having a dynamically adjustable transfer function;
- providing a first optical amplifier and a second optical amplifier interconnected by the DGEQ to form a dynamic amplifier site in the optical network;
- and
- controlling spectral power profile of the optical signal at an output of the dynamic amplifier site by dynamically adjusting a transfer function associated with the DGEQ;
- controlling average power of the optical signal by dynamically adjusting gains of the first optical amplifier and the second optical amplifier;
- and
- decoupling a first optical amplifier control loop, a DGEQ control loop, and a second optical amplifier control loop, respectively utilized to control outputs of the first optical amplifier, the DGEQ, and the second optical amplifier.
A method of dynamically compensating for signal loss and dispersion in an optical signal traversing though an optical network;
- comprising:
- providing a dynamic gain equalization filter (DGEQ) having a dynamically adjustable transfer function;
- providing a first optical amplifier and a second optical amplifier interconnected by the DGEQ to form a dynamic amplifier site in the optical network;
- and
- partitioning control objectives amongst the first optical amplifier, the second optical amplifier, and the DGEQ, thereby compensating for signal loss and dispersion in the optical signal.
A dynamic optical amplifier system, comprising:
- a dynamic gain equalizer (DGEQ) filter configured to receive an optical signal and operable to adjust a spectral power profile of the optical signal;
- at least one optical amplifier connected to said DGEQ filter and operable to adjust optical power level of the optical signal;
- and
- an optical spectral analysis (OSA) unit configured to measure spectral power profile of the optical signal at a plurality of measurement points in said system, wherein the measurements are utilized in at least one optical amplifier control loop and a DGEQ control loop.
A system for achieving an optimum signal to noise ratio (OSNR) in a optical signal launched into an optical fiber by dynamically compensating for signal loss and dispersion in said optical signal using a layered control strategy, said system comprising:
- a first and a second erbium-doped fiber amplifier (EDFA) configured to dynamically adjust a total output power of the optical signal;
- a distributed Raman amplifier configured to dynamically adjust the spectral profile of the optical signal, and output the adjusted signal to said first EDFA;
- and
- a dynamic gain equalization filter (DGEQ) interconnected between said first EDFA and said second EDFA, said DGEQ configured to further adjust the spectral profile of the optical signal.
A method of dynamically compensating for signal loss and dispersion in an optical signal traversing though an optical network;
- comprising:
- providing a dynamic gain equalization filter (DGEQ) having a dynamically adjustable transfer function;
- providing a first optical amplifier and a second optical amplifier interconnected by the DGEQ to form a dynamic amplifier site in the optical network;
- and
- controlling spectral power profile of the optical signal at an output of the dynamic amplifier site by dynamically adjusting a transfer function associated with the DGEQ, wherein controlling the spectral power profile further includes providing a Raman amplifier connected to an input of the first optical amplifier operable to remove spectral tilt and ripple from the optical signal such that an output of the Raman amplifier is maximized and flattened.
Dependencies are inferred from the claim text.