论文标题
与同时二次和kerr非线性的波导中的拉曼·孤子
Raman solitons in waveguides with simultaneous quadratic and Kerr nonlinearities
论文作者
论文摘要
我们分析了由二次和立方非线性支持的两个组成孤子中拉曼引起的自频变化。将拉曼术语视为扰动，我们得出了基本频率和第二个谐波孤子组件的孤子速度和频移的表达式。我们发现这些预测与孤子传播的模拟很好地比较。我们还表明，拉曼偏移会导致两个组件孤子接近其自身存在的边界，然后触发孤子的不稳定性。在某些情况下，这些不稳定性几乎完全将功率转移到第二个谐波中，并出现了单组分Kerr Solitonic Pulse。
We analyse Raman-induced self-frequency shift in two-component solitons supported by both quadratic and cubic nonlinearities. Treating Raman terms as a perturbation, we derive expressions for soliton velocity and frequency shifts of the fundamental frequency and second harmonic soliton components. We find these predictions compare well with simulations of soliton propagation. We also show that Raman shift can cause two-component solitons to approach the boundary of their own existence and subsequently trigger soliton instabilities. In some cases these instabilities are accompanied by an almost complete transfer of power to the second harmonic, and emergence of a single-component Kerr solitonic pulse.
