翻译一段话。
Fig. 1. Different regimes of soliton propagation in the medium with harmonic modulation of the linear refractive index: (a) Undistorted propagation at T=π/4,p=1, α=0.05. (b) Oscillations within the central channel at T=π/4,p=0.25, α=0.7. (c) Fast switching to the fifth channel at T=π/2,p=1, α=0.8. (d) Radiative decay at T=π,p=0.25, α=1.13
Fig. 2. (a) Critical angle and (b) amplitude of a stationary guided wave versus period of the refractive-index modulation at p _ 0.25 for various values of form factor x. (c) Dependence of the number of the output channel on the incident angle at T=π/2for different guiding parameters. (d) Dependence of the number of the output channel on the period of the refractive-index modulation at p _ 0.5 for different incident angles.
Fig. 3. (a) Dependence of the number of the output channelon the guiding parameter at T= π/2 andα= 0.5. (b) and (c) Modification of spatial soliton mobility for p = 0.25 and p = 0.7, respectively.