Method and apparatus providing transient control in optical add-drop nodes
First Claim
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1. A method of transient control in a wavelength division multiplexed (WDM) optical transmission system, comprising:
- monitoring a WDM optical signal received via an optical signal bearing medium and having a plurality of wavelength channels including at least one uninterrupted wavelength channel and at least one interrupted wavelength channel; and
replacing the at least one interrupted wavelength channel with a replacement wavelength channel having optical power and spectral characteristics similar to the at least one interrupted wavelength channel such that optical transients normally associated with amplification of a WDM optical signal having an interrupted wavelength channel are reduced, the WDM optical signal including the at least one uninterrupted wavelength channel and at least one replacement wavelength channel.
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Abstract
A method and apparatus for determining if an optical input signals has been interrupted and responsively replacing an interrupted optical input signal with a replacement optical signal having a similar optical profile (e.g., such as a loopback between OADMs within a backbone network), thereby insuring that transient-induced high speed optical amplifier adjustments are avoided.
86 Citations
40 Claims
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1. A method of transient control in a wavelength division multiplexed (WDM) optical transmission system, comprising:
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monitoring a WDM optical signal received via an optical signal bearing medium and having a plurality of wavelength channels including at least one uninterrupted wavelength channel and at least one interrupted wavelength channel; and replacing the at least one interrupted wavelength channel with a replacement wavelength channel having optical power and spectral characteristics similar to the at least one interrupted wavelength channel such that optical transients normally associated with amplification of a WDM optical signal having an interrupted wavelength channel are reduced, the WDM optical signal including the at least one uninterrupted wavelength channel and at least one replacement wavelength channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for transient control in a wavelength division multiplexed (WDM) optical transmission system, comprising:
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means for monitoring a WDM optical signal having a plurality of wavelength channels including at least one uninterrupted wavelength channel and at least one interrupted wavelength channel; and means for replacing the at least one interrupted wavelength channel with a replacement wavelength channel having optical power and spectral characteristics similar to the at least one interrupted wavelength channel such that optical transients normally associated with amplification of a WDM optical signal having an interrupted wavelength channel are reduced, the WDM optical signal including the at least one uninterrupted wavelength channel and at least one replacement wavelength channel. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A computer readable storage medium storing instructions which, when executed by a processor, cause the processor to perform a method for transient control in a wavelength division multiplexed (WDM) optical transmission system, the method comprising:
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monitoring a WDM optical signal having a plurality of wavelength channels including at least one uninterrupted wavelength channel and at least one interrupted wavelength channel; and replacing the at least one interrupted wavelength channel with a replacement wavelength channel having optical power and spectral characteristics similar to the at least one interrupted wavelength channel such that optical transients normally associated with amplification of a WDM optical signal having an interrupted wavelength channel are reduced, the WDM optical signal including the at least one uninterrupted wavelength channel and at least one replacement wavelength channel. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. An apparatus for transient control in a wavelength division multiplexed (WDM) optical transmission system, comprising:
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a monitor configured to monitor a WDM optical signal having a plurality of wavelength channels including at least one uninterrupted wavelength channel and at least one interrupted wavelength channel; and a controller configured to replace the at least one interrupted wavelength channel with a replacement wavelength channel having optical power and spectral characteristics similar to the at least one interrupted wavelength channel such that optical transients normally associated with amplification of a WDM optical signal having an interrupted wavelength channel are reduced, the WDM optical signal including the at least one uninterrupted wavelength channel and at least one replacement wavelength channel. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification