130517.fig.003a
(a)
130517.fig.003b
(b)
130517.fig.003c
(c)
130517.fig.003d
(d)
Figure 3: Power transfer in the waveguides of the ds-coupler for two equal input signals ((16), (17), and (18), with initial conditions , , in (a), (b), (c), (d), resp.). Magenta dotted-dashed line: amplitude and ; black solid line: amplitude .