Abstract
Various nonequilibrium multi-pulse states can emerge in a mode-locked laser through interactions between the quasi-continuous-wave background (qCWB) and pulses inside the laser cavity. While they have been regarded as unpredictable and hardly controllable due to the noise-like nature of qCWB, we here demonstrate that the qCWB landscape can be manipulated via optoacoustically mediated pulse-to-qCWB interactions, which alters the behaviors of multi-pulse dynamics. In this process, impulsive qCWB modulations are created at well-defined temporal locations, which act as the point emitters and attractive potentials for drifting pulse bunches and soliton rains. Hence, we can transport a single pulse bunch from a certain temporal position to another, and also make soliton rains created and collided exclusively at specific temporal locations. Our study opens up possibilities to control the nonequilibrium multi-pulse phenomena precisely in the time domain, which would offer a practical means of advanced optical information processing.
Highlights
Various nonequilibrium multi-pulse states can emerge in a mode-locked laser through interactions between the quasi-continuous-wave background and pulses inside the laser cavity
The formation of pulse bunches and bound pulse states via the optoacoustic inter-pulse coupling has been investigated[21,22,23,24]. Another crucial mechanism that significantly influences the multi-pulse dynamics (MPD) is the noise-like fluctuation of the quasi-continuous-wave background that spreads over the entire laser cavity[25,26,27,28,29,30]
We experimentally show that the quasi-continuous-wave background (qCWB) landscape can be manipulated via the optoacoustically excited acoustic resonances (ARs) in the single-mode fiber laser cavity, which in turn dramatically alters the nonequilibrium MPD
Summary
Various nonequilibrium multi-pulse states can emerge in a mode-locked laser through interactions between the quasi-continuous-wave background (qCWB) and pulses inside the laser cavity.
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