We investigate generation regimes of dispersion-managed solitons depending on the net cavity dispersion of the all-fiber polarization maintaining laser. Dispersion changes from anomalous region, where shortest pulses are achieved, crossing zero to normal values, where high pulse energy can be reached, provides flexibility of pulse output parameters for different possible applications. One of which is a pump of epitaxial single-photon source where it was tested as an alternative to Ti:Sa laser. The experimental results confirmed identical to Ti:Sa laser efficiency while retaining high purity of the single-photon source.
Harmonic mode-locked fiber lasers provide generation of the ultrashort pulse train with high repetition rates up to gigahertz scale. However, setting appropriate parameters for the laser cavity to reach a harmonic mode-locked regime is often a non-trivial task. Depending on the dynamic of adjustment of the cavity elements one may reach unstable, multipulsing or harmonic mode-locked regimes at the same end-point parameters. Here, we demonstrate the state-of-theart fiber mode-locked laser assisted with reinforcement Soft Actor-Critic algorithm that is capable of learning a dynamic strategy of adjusting cavity parameters to maximize the order of harmonic mode-locked regime. Control of the pumping power and nonlinear transmission function of the state-of-the-art single walled carbon nanotube saturable absorber allows reaching a stable harmonic mode-locked regime.
This work presents for the first time a study of a fibre laser mode-locked due to a carbon-nanotube-based saturable absorber whose parameters could be controlled by a joined action of optical radiation and electric field. Combination of different types of control (optical and electrical) allowed variation of dynamics of the saturable absorber parameters and greater choice of pulsed generation regimes.We demonstrated the possibility of live switching of laser generation between various pulsed regimes through combined electro-optical action on the polymer-free carbon nanotube film.
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