The Constant Power Spectral Density Model for Capacity Optimization of Submarine Links
Journal of Lightwave Technology, ISSN: 1558-2213, Vol: 41, Issue: 3, Page: 968-979
2023
- 2Captures
Metric Options: CountsSelecting the 1-year or 3-year option will change the metrics count to percentiles, illustrating how an article or review compares to other articles or reviews within the selected time period in the same journal. Selecting the 1-year option compares the metrics against other articles/reviews that were also published in the same calendar year. Selecting the 3-year option compares the metrics against other articles/reviews that were also published in the same calendar year plus the two years prior.
Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
Citation Benchmarking is provided by Scopus and SciVal and is different from the metrics context provided by PlumX Metrics.
Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
Citation Benchmarking is provided by Scopus and SciVal and is different from the metrics context provided by PlumX Metrics.
Metrics Details
- Captures2
- Readers2
Article Description
We review the fundamentals of the recently proposed Constant Power Spectral Density (CPSD) model for very long-haul space-division multiplexed submarine links, and highlight its use for Erbium-doped fiber amplifier (EDFA) optimization to maximize the achievable information rate (AIR) of the link. The CPSD line is an abstraction of modern submarine lines, where all EDFAs have identical physical parameters, among which the doped-fiber length ℓ, and the same pump and Erbium inversion, with identical gain-shaping filters that reproduce the line input power spectral density at the output of each span. The key idea in the CPSD line analysis is to use the hidden state-variable of the EDFA, namely the Erbium population inversion x, as a free variable. When x is known, so is the EDFA gain and its noise figure frequency profiles. Thus in the CPSD line we derive a simple expression of the received signal to noise ratio and thus of the AIR in the assumption of Gaussian noises. Among the set of input wavelength-division multiplexed signals that achieve inversion x at EDFA length ℓ we can find analytically the one maximizing AIR(x,ℓ). We finally look numerically for the best (x,ℓ) values that maximize AIR, i.e., we optimize the line EDFAs for maximum AIR. The major novelty of this invited paper is the extension of the analysis to include nonlinear effects into the AIR optimization.
Bibliographic Details
Institute of Electrical and Electronics Engineers (IEEE)
Provide Feedback
Have ideas for a new metric? Would you like to see something else here?Let us know