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- W2026854418 abstract "We study the dynamics of multimode semiconductor lasers with optical feedback. Our model takes into account explicitly spatial effects, which are included by considering spatial profiles for $N$ longitudinal modes coupled to the space-dependent gain. We also consider the effect of carrier diffusion. We find that in the weak feedback regime the longitudinal modes display antiphase oscillations that lead to a nearly constant output intensity. This result is largely independent of the value of the diffusion coefficient. For larger feedback we observe in-phase fast oscillations at a frequency close to the relaxation oscillation frequency of the solitary laser. In these two regimes, the total output of the laser has the properties of a single-mode laser for nondispersive applications. We assess the validity of an existing approximation scheme that has dealt with spatial inhomogeneities by expanding the carrier density into a truncated hierarchy of moments. We demonstrate that this approximation is very good when the underlying carrier diffusion is fast, thus leading to a weakly developed carrier grating." @default.
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- W2026854418 date "2005-01-27" @default.
- W2026854418 modified "2023-09-24" @default.
- W2026854418 title "Antiphase dynamics in multimode semiconductor lasers with optical feedback" @default.
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- W2026854418 doi "https://doi.org/10.1103/physreva.71.013818" @default.
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