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Binary Darboux transformation and multi-dark solitons for a higher-order nonlinear Schrödinger equation in the inhomogeneous optical fiber
Chong Yang,Xi-Yang Xie
Figure 5.
Dark-three solitons via solutions (
34
) with the parameters: (a)
n
= 3,
ς
= 0,
κ
= 1,
η
= 0.5,
λ
1
= 0.125,
λ
2
= 0.5,
λ
3
= 0.75,
ρ
1
=
1
2
(
1
2
−
3
√
7
4
i
)
,
ρ
2
=
1
2
(
1
2
−
√
15
2
i
)
,
ρ
3
=
1
2
(
1
2
−
√
3
i
)
,
a
(
x
) = 0.1,
c
(
x
) = 0.2 and
f
(
x
) = 0.1; (b) Parameters are the same as (a) except for
a
(
x
) = 0.7
x
.