Alexandr Zaviyalov

Observation of soliton molecules with independently evolving phase in a mode-locked fiber laser

We report the experimental generation of two-soliton molecules in an all-polarization-maintaining ytterbium-doped fiber laser operating in the normal dispersion regime. These molecules exhibit an independently evolving phase and are characterized by a regular spectral modulation pattern with a modulation depth of 80% measured as an averaged value. Moreover, the numerical modeling confirms that the limited modulation depth of the spectrum is caused by the evolution of the phase difference between the pulses.

Impact of slow gain dynamics on soliton molecules in mode-locked fiber lasers

We theoretically demonstrate and experimentally confirm the major influence of gain dynamics on soliton molecules that self-assemble in mode-locked lasers. Both slow gain recovery and depletion play a pivotal role in the formation of chirped soliton molecules characterized by an increasing separation from leading to trailing pulses. These chirped molecules actually consist of many pulses and may be termed macromolecules. They are experimentally observed in a fiber laser and numerically modeled by an approach that properly includes the slow gain dynamics. Furthermore, it is shown that these processes stabilize soliton trains in fiber lasers by inhibiting internal oscillations.

Effect of Slow Gain Dynamics in Mode-Locked Fiber Lasers: Chirped Soliton Molecules

We theoretically and experimentally demonstrate the pivotal role of the gain dynamics in the formation of chirped soliton molecules in mode-locked lasers. Such molecules are characterized by an increasing separation from leading to trailing pulses.

Rogue waves in a mode-locked fiber laser

Suddenly appearing walls of water or so called rogue waves (RWs) are disturbing and destructive phenomena in the ocean which are responsible for many sunken ships and human lives. RW phenomena are still poorly investigated because their systematic study is extremely difficult in the real environment due to high risk and their unpredictable (random) appearance on the ocean surface [1].

Robust dissipative soliton molecules with nonlinearly evolving phase in mode-locked fiber lasers

We numerically obtain novel two-soliton molecules with nonlinearly evolving phase in mode-locked fiber lasers. They represent robust oscillating solutions with independently evolving phase difference or flipping phase difference, alternating between zero and π.

Flipping Phase Dissipative Soliton Molecules in Mode-Locked Fiber Lasers

We numerically obtain novel two-soliton molecules with flipping phase in mode-locked fiber lasers. They represent oscillating solutions with alternating phase difference between zero and ?. For smaller peak-to-peak separation the phase difference can evolve independently.