Experimental observation of transient mode-locking in the build-up stage of a soliton fiber laser

In this paper, we demonstrated a series of short-living mode-locking (ML) states (each lasting a few to a hundred microseconds) that happened before a fiber laser reached a steady ML state. With time-stretched dispersion Fourier transform spectroscopy, a rich diversity of transient multi-pulse dynamics were revealed spectrally and temporally. As a result, we found that the formation of the short-living ML states was related to abundant pump power, and their decaying evolution dynamics were possibly governed by gain depletion and recovery. Our results revealed unexpected transient lasing behaviors of a soliton laser and thus might be useful to understand the complex dynamics of mode-locked lasers.

Automated summary

This paper demonstrated a series of short-living mode-locking states in a fiber laser before reaching a steady state, revealing the transient dynamics related to pump power, gain depletion, and recovery. The unexpected transient lasing behaviors of a soliton laser were uncovered, providing insights into the complex dynamics of mode-locked lasers.