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Experiments on a transparent, constant-gain-controlled amplifier ring network show that channel-power coupling can lead to instability in channel power control at add drop nodes. This instability can cause power oscillations due to competing adjustments on multiple nodes. Sequencing channel power tuning on each node is shown to result in stable power control. A distributed node scheduling algorithm...
Optical channel monitoring is used for managing and conditioning dense wavelength division multiplexed (DWDM) signals in optically transparent transmission systems. In addition to measuring channel power and wavelength, more detailed channel identification information is desirable such as modulation format and bit rate. This application is particularly challenging in optically transparent mesh transport...
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