Modulation instability, rogue waves and conservation laws in higher-order nonlinear Schrödinger equation
Min-Jie Dong,Li-Xin Tian
Figure 1. Gain spectra of modulation instability for the parameter values: (a) α=1, δ=1;  (b) α=0, δ=0; (c) α=1, δ=0; (d) α=0, δ=1 , and for the different power levels as legend.