A Generalized Raman Scattering Model for Real-Time SNR Estimation of Multi-Band Systems

We investigate the impact of stimulated Raman scattering (SRS) in multi-band transmissions. We first derive and test against numerical results an extended Christodoulides-Zirngibl (ECZ) SRS model based on a triangular approximation of the Raman gain. Then, we exploit the ECZ SRS model in the context...

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Bibliographic Details
Published in:Journal of lightwave technology 2023-06, Vol.41 (11), p.3407-3416
Main Authors: Lasagni, Chiara, Serena, Paolo, Bononi, Alberto, Antona, Jean-Christophe
Format: Article
Language:English
Subjects:
Bandwidth
Bandwidths
Estimation
Gaussian noise (GN) model
Mathematical analysis
multi-band
Numerical models
Optical attenuators
Optical scattering
Phase modulation
Raman spectra
Random noise
Signal to noise ratio
Spontaneous emission
Stimulated Raman scattering (SRS)
ultra-wide band
Wavelength division multiplexing
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Summary:We investigate the impact of stimulated Raman scattering (SRS) in multi-band transmissions. We first derive and test against numerical results an extended Christodoulides-Zirngibl (ECZ) SRS model based on a triangular approximation of the Raman gain. Then, we exploit the ECZ SRS model in the context of the Gaussian noise (GN) model. We generalize some known closed-form expressions of the self- and cross-phase modulation variances, as well as the amplified spontaneous emission noise variance, over multi-band systems of bandwidth wider than the SRS bandwidth, i.e., beyond the C+L band. Finally, the proposed theoretical model is used to estimate the performance of multi-band systems in terms of signal-to-noise ratio (SNR) and achievable information rate (AIR).
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2023.3250751