数值研究了二阶孤子在具有横向折射率周期性调制的Kerr型光学格子中的传输特性,研究结果表明:横向折射率周期性调制会导致二阶孤子裂变成振幅大小不等的两基态孤子。当初始入射角大于某一临界值或调制周期与调制深度小于某一临界值时,裂变后大振幅基态孤子将跨越势阱向前传输;反之,它将被类似波导形式的路径俘获。而小振幅基态孤子将始终跨越势阱向前传输。因此光学格子中二阶孤子这种独特传输行为对光计算、全光通信以及新型光子器件开发等领域具有重要的理论和实际指导意义。 The results show that the periodic modulation of the second-order soliton can lead to the splitting of the second-order soliton into the two ground state solitons with different amplitudes in the Kerr-type optical lattice with periodic modulation of lateral refractive index. . When the initial incident angle is greater than a critical value or the modulation period and modulation depth are less than a critical value, the large-amplitude ground state soliton will propagate forward across the potential well; otherwise, it will be captured by a waveguide-like path. A small amplitude ground state soliton will always transmit across the potential well. Therefore, the unique transmission behavior of second-order solitons in optical lattices has important theoretical and practical significance in the fields of optical computing, all-optical communications and the development of new photonic devices.