  Evolution of dissipative-soliton-resonance (DSR) pulses in an
all-normal-dispersion fiber laser with pump power under various operation
conditions are experimentally studied. The fiber laser is mode-locked by using
a nonlinear fiber loop mirror. Apart from the typical pulse broadening due to
the peak power clamping effect, pulse breaking was observed. In addition, pulse
narrowing with pump power increasing was observed. All the incompatible
evolution of DSR pulses could be attributed to the multiple parameters change
due to pump power increasing under specific operation conditions.
