Fig. 1: Mode-locking principle and theoretical analysis.
From: Dissipative soliton generation and real-time dynamics in microresonator-filtered fiber lasers
a Scheme for dissipative soliton generation in microresonator-filtered fiber lasers. A microresonator is nested in a fiber laser cavity. b Cold-cavity spectral distribution, showing the FSRs of the large fiber cavity and microresonator resonances, and corresponding linewidth of the microresonator. The detuning represents the relative position of the oscillating mode within the microresonator resonance. In b, red detuning is shown. c, d Simulations for microresonator with anomalous GVD (c) and normal GVD (d). The nonlinearity, GVD and gain dispersion of the EDFA are neglected. Subfigure (i): bifurcation of homogeneous states. Subfigure (ii): transmission of the lower branch. Subfigure (iii): self-initiation of dissipative soliton from ASE. Subfigures (iv) and (v): spectra and pulse profiles before and after the microresonator. e, f Simulated mode-locked pulse profiles (left) and spectra (right) for microresonators with anomalous GVD (e) and normal GVD (f) by varying the GVD of the EDFA
