{"ID":2894501,"CreatedAt":"2026-06-01T04:54:23.091178241Z","UpdatedAt":"2026-06-01T04:54:23.091178241Z","DeletedAt":null,"paper_url":"https://arxiv.org/abs/2507.11517","arxiv_id":"2507.11517","title":"Wideband Gaussian Noise Model of Nonlinear Distortions From Semiconductor Optical Amplifiers","abstract":"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.","short_abstract":"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 signa...","url_abs":"https://arxiv.org/abs/2507.11517","url_pdf":"https://arxiv.org/pdf/2507.11517v2","authors":"[\"Hartmut Hafermann\"]","published":"2025-07-15T17:39:03Z","proceeding":"physics.optics","tasks":"[\"physics.optics\",\"eess.SP\"]","methods":"[]","has_code":false}