Stability of the NLS Equation with Viscosity Effect

Figure 3

Plots of the real part of the growth rate 𝜔₁ as a function of the modulational wavenumber 𝜅 for 𝛼=1 (a) and 𝛼=−1 (b). The curves are given for several values of 𝑘₀/𝜖 and under an assumption that 𝜅 is sufficiently a small parameter.

(a)

(b)