Abstract
Software-defined networking is enabling wavelength-division multiplexed (WDM) networks to be programmable down to individual components. While taking into account typical gain and noise figure profiles of erbium-doped fiber amplifier (EDFA) components, the authors consider a number of signal power control strategies and compare their performance in terms of achievable lightpath optical signal-to-noise ratio (OSNR). These strategies are applied network-wide to concurrently control the gain of each individual amplifier and the signal power equalization at each reconfigurable optical add/drop multiplexer. Simulation and (in part) experimental results show that the lightpath OSNR is affected by three factors: the EDFA gain control strategy, power equalization strategy and wavelength assignment (WA) algorithm. A trade-off between lightpath average OSNR and OSNR variance across the WDM channels is also noted. Experimental work is conducted using a five-node meshed WDM network testbed proving both feasibility and effectiveness of a coordinated use of signal power control strategies and WA algorithms.
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Acknowledgments
This research was supported in part by NSF Grants No. CNS-1111329, CNS-1405405 and CNS-1409849 and the financial support of FUNTTEL, FINEP and CPqD Foundation under the Project 100GETH.
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Wang, X., Fei, Y., Razo, M. et al. Effects of signal power control strategies and wavelength assignment algorithms on circuit OSNR in WDM networks. Photon Netw Commun 31, 404–417 (2016). https://doi.org/10.1007/s11107-015-0596-x
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DOI: https://doi.org/10.1007/s11107-015-0596-x