Serebryannikov E E, Zheltikov A M, Köhler S, Ishii N, Teisset C Y, Fuji T, Krausz F, Baltuska A
Physics Department, International Laser Center, M. V. Lomonosov Moscow State University, Vorob'evy gory, Moscow 119992, Russia.
Phys Rev E Stat Nonlin Soft Matter Phys. 2006 Jun;73(6 Pt 2):066617. doi: 10.1103/PhysRevE.73.066617. Epub 2006 Jun 19.
The balance between diffraction and index-step guiding in photonic-crystal fibers is controlled by modifying the fiber structure, leading to different wavelength dependences of the effective mode area and providing a mechanism to control nonlinear-optical phenomena. In optical fibers with a steep profile, the guided mode of the light field tends to become much less compact with an increase in radiation wavelength, slowing down the Raman-induced soliton self-frequency shift of an ultrashort laser pulse. A reduction of the soliton self-frequency shift is demonstrated for input laser pulses.
通过改变光纤结构来控制光子晶体光纤中衍射与折射率阶跃导光之间的平衡，这会导致有效模面积呈现不同的波长依赖性，并提供一种控制非线性光学现象的机制。在具有陡峭折射率分布的光纤中，随着辐射波长增加，光场的导模往往会变得不那么紧凑，从而减缓超短激光脉冲的拉曼诱导孤子自频移。对于输入激光脉冲，孤子自频移得到了降低。
