Afshar V Shahraam, Monro T M, de Sterke C Martijn
Institute for Photonics and Advanced Sensing (IPAS), The University of Adelaide, 5005, Australia.
Opt Express. 2013 Jul 29;21(15):18558-71. doi: 10.1364/OE.21.018558.
We resolve the ambiguity in existing definitions of the effective area of a waveguide mode that have been reported in the literature by examining which definition leads to an accurate evaluation of the effective Kerr nonlinearity. We show that the effective nonlinear coefficient of a waveguide mode can be written as the product of a suitable average of the nonlinear coefficients of the waveguide's constituent materials, the mode's group velocity and a new suitably defined effective mode area. None of these parameters on their own completely describe the strength of the nonlinear effects of a waveguide.
我们通过研究哪种定义能导致对有效克尔非线性的准确评估，来解决文献中已报道的波导模式有效面积现有定义中的模糊性。我们表明，波导模式的有效非线性系数可写成波导组成材料非线性系数的适当平均值、模式群速度以及新的适当定义的有效模式面积的乘积。这些参数单独都不能完全描述波导非线性效应的强度。
