Strongly chirped dissipative solitons in normal and anomalous dispersion regimes

Abstract

We study strongly chirped dissipative solitons of the cubic-quintic complex Ginzburg-Landau equation in normal and anomalous group-delay dispersion. Using a stationary-phase (adiabatic) approximation, we derive analytic spectra and construct master diagrams linking the control-parameter ratios (spectral filtering, dispersion, and cubic-quintic self-phase/self-amplitude modulation) to the scaled soliton energy. Dissipative-soliton resonance appears generically in normal dispersion from admissibility constraints, while in anomalous dispersion it occurs only when the resonance locus lies inside the adiabatic existence window, which requires sufficiently strong saturable quintic self-phase modulation. Normal-dispersion spectra are intrinsically truncated, whereas anomalous-dispersion spectra develop a structured, approximately self-similar core (two-horn envelope with smooth wings) with effective truncation set by spectral dissipation; in the energy-scaling regime, the energy dependence is captured mainly by a scalar prefactor while the unit-peak core remains nearly invariant. We further show that anomalous-dispersion coherence separates into an energy-dependent autocorrelation magnitude and an almost invariant normalized coherence shape, revealing two correlation times: a short, bandwidth-limited scale and a long, core-controlled scale. Finally, we outline a thermodynamic interpretation of this scale separation and its implications for single-to-multi-soliton transitions, and discuss how analogous two-scale coherence phenomenology may arise in weakly dissipative Bose-Einstein condensates and in driven optical condensates under bandwidth-limited losses.