Figure 9
From: Polarization domain wall pulses in a microfiber-based topological insulator fiber laser
PL vector dark pulses.
(a) Pulse traces of fundamental vector dark pulses before (Initial) and after (x axis and y axis) passing through the PBS and (b) corresponding optical spectra; (c) pulse traces of high order harmonic mode-locked vector dark pulses and (d) corresponding optical spectra.
