Wideband Gaussian Noise Model of Nonlinear Distortions From Semiconductor Optical Amplifiers
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866910051072999424 |
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| author | Hafermann, Hartmut |
| author_facet | Hafermann, Hartmut |
| contents | A wideband Gaussian Noise Model of the nonlinear noise power spectral density is developed for a single semiconductor optical amplifier as described by the Agrawal model. A simple, interpretable closed-form expression is obtained for the nonlinear noise-to-signal ratio of broadband wavelength-division multiplexed signals as a function of the Agrawal model parameters, the amplifier output power and the transmission bandwidth. The accuracy of the closed-form expression and its region of validity are assessed in numerical simulations. The error is smaller than 0.1 dB when the product of bandwidth and gain recovery time $B\timesτ_c$ exceeds 100. A complete treatment of gain compression is shown to enhance nonlinear noise by a factor $1+P_\text{out}/P_\text{sat}$ compared to the first-order perturbation theory result. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2507_11517 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Wideband Gaussian Noise Model of Nonlinear Distortions From Semiconductor Optical Amplifiers Hafermann, Hartmut Optics Signal Processing A wideband Gaussian Noise Model of the nonlinear noise power spectral density is developed for a single semiconductor optical amplifier as described by the Agrawal model. A simple, interpretable closed-form expression is obtained for the nonlinear noise-to-signal ratio of broadband wavelength-division multiplexed signals as a function of the Agrawal model parameters, the amplifier output power and the transmission bandwidth. The accuracy of the closed-form expression and its region of validity are assessed in numerical simulations. The error is smaller than 0.1 dB when the product of bandwidth and gain recovery time $B\timesτ_c$ exceeds 100. A complete treatment of gain compression is shown to enhance nonlinear noise by a factor $1+P_\text{out}/P_\text{sat}$ compared to the first-order perturbation theory result. |
| title | Wideband Gaussian Noise Model of Nonlinear Distortions From Semiconductor Optical Amplifiers |
| topic | Optics Signal Processing |
| url | https://arxiv.org/abs/2507.11517 |