Narrow-Bandwidth Dissipative Solitons in the Anomalous Dispersion Regime With Large Spectral Tunability

Mode-locked fiber lasers delivering ultrafast and intense optical pulses with picosecond or femtosecond pulse widths are powerful tools for nonlinear science and applications such as optical frequency comb-based metrology, bioimaging or high-precision micromachining [1]. Most of the previous works focus on the generation and development of wideband, narrow pulse width laser pulses. However, narrow-bandwidth optical pulses seem to be neglected. Such optical pulses with narrow bandwidth/long pulse duration, play important role for quantum optics, and has gained increasing attention in recent years [2]. Here, we present a carbon nanotube (CNT)-mode-locked fiber laser with all-PM format, capable of generating ultranarrow-bandwidth pulses down to 12.1 pm (equivalent to 1.49 GHz) while offering large tunability in both wavelength and pulse width.