Abstract

Based on the experimental platform of an L-band normal-dispersion mode-locked fiber laser, we report the first observation, to our knowledge, of three novel types of multi-soliton asynchronous pulsation phenomena by virtue of the dispersive Fourier transform technique. The experimental results provide new insights into the complex multi-soliton dynamics under unstable mode-locking conditions. It is confirmed that more than one pulsating solution can coexist in a multi-pulse situation and that each soliton may evolve periodically in different ways. This implies that subsequent experimental and theoretical studies on multi-soliton need to take the differences among pulses into account and retrieve more degrees of freedom.

© 2020 Optical Society of America

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