Voronin Aleksandr A, Zheltikov Aleksei M
Department of Physics, International Laser Center, M.V. Lomonosov Moscow State University, Vorob'evy gory, Moscow 119992, Russia.
Opt Lett. 2008 Aug 1;33(15):1723-5. doi: 10.1364/ol.33.001723.
Self-steepening of ultrashort light pulses is shown to reduce the soliton self-frequency shift (SSFS) induced by the Raman effect in an optical fiber. We derive an analytical expression for the SSFS that conserves the number of photons and allows the SSFS to be calculated for arbitrary frequency profiles of fiber dispersion and Raman gain without a numerical solution of the pulse evolution equation. The accuracy of this analytical approach to SSFS calculation is tested by numerical simulations based on the generalized nonlinear Schrödinger equation.
超短光脉冲的自陡峭效应被证明可减少光纤中拉曼效应引起的孤子自频移（SSFS）。我们推导了一个用于SSFS的解析表达式，该表达式守恒光子数，并允许在不求解脉冲演化方程数值解的情况下，针对光纤色散和拉曼增益的任意频率分布计算SSFS。基于广义非线性薛定谔方程的数值模拟检验了这种计算SSFS的解析方法的准确性。
