Figure 3
From: Diversified pulse generation from frequency shifted feedback Tm-doped fibre lasers
(a) The oscilloscope trace of the 5-pulse-bundle; (b) The variation of the number of the sub-pulses versus the increasing and decreasing pump power; The oscilloscope trace of the output pulse train under the pump power of (c) 0.6 W and (d) 0.9 W.
