英语翻译The narrower the input beam,the higher the critical angl

英语翻译
The narrower the input beam,the higher the critical angle and the smaller the deviation of q0 from .The guided-wave amplitude is always smaller than that for the soliton beam in a uniform medium and approaches as guiding parameter p ->!0.
Numerical simulations indicate that beams moving along the grating slowly radiate—an effect not captured by the effective-particle approach.When solitons cross the waveguide,they lose a fraction of their energy because the wing of the soliton spatial spectrum overlaps the spatial spectrum of the guided mode.The radiation rate increases as the incident angle approaches angleαb corresponding to the edge of the first Brillouin zone.12,13 The energy losses caused by the excitation of consecutive waveguides result in the slant soliton beam being trapped in one of the grating channels.This situation is shown in Fig.1(c).Note that the propagation distance at which trapping occurs is relatively small.Intuitively,it is clear that the larger the incident angle,the higher the channel number at which trapping occurs.Such radiative trapping has much in common with the properties of discrete solitons in waveguide arrays;
翻译完追加100分.是有关光学格子特性方面的资料.直接google /有道翻译就免了.有点难度.