Figure 4From: Chirped optical soliton perturbation of Fokas–Lenells equation with full nonlinearityChirped dark soliton solution (27) with \(a_{1}=4\), \(a_{2}=1\), \(b=2\), \(\alpha=2\), \(\lambda=6\), \(\mu=1\), \(\nu=1\), \(\sigma=2\), \(\varOmega=3\). (a) Modulus. (b) Real part. (c) Corresponding chirpBack to article page