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We demonstrate a coherent modulator and a receiver based on monolithically-integrated silicon photonic circuits, capable of modulating and detecting 224-Gb/s polarization-division-multiplexed 16-QAM. The high-degree photonic integration promises small-form-factor and low-power transceivers for future coherent systems.
We show that novel modulation formats enabled by digital coherent receivers can significantly reduce the required received optical power in Free Space Optical (FSO) systems, thereby enabling links with significantly lower Size, Weight, and Power (SWaP).
Next-generation high-speed coherent optical communication systems targeting beyond 100-Gb/s per channel, have opened opportunities for innovations in component and subsystem areas that this tutorial will attempt to address, covering photonics, electronics and signal processing technologies.
We report generation of 80-Gb/s RZ-OOK signals using a hybrid photonic integrated electroabsorption device. We achieve this using electronics having a bandwidth of 40 GHz or less and without using an external optical pulsed source.
The power divergence and the resulting transmission penalty due to wavelength rerouting is measured in long-haul transmission for different power adjustment steps in an applied constant gain circulating loop experiment.
The modification of transient channel-power excursions due to propagation through nodes with different add-drop configurations are observed through experiments. Simulation results demonstrate similar propagation of channel power excursions through transparent networks.
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...
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