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arXiv 1409.2239physics.optics
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波导光传输的解析模型及其应用

Analytical model for waveguide light propagation and applications

Santiago Rojas Rojas, Luis Morales-Inostroza, Uta Naether, Guilherme B. Xavier, Stefan Nolte, Alexander Szameit, Rodrigo A. Vicencio, Gustavo Lima, Aldo Delgado

摘要:

研究了飞秒激光写入椭圆波导阵列的偏振特性。提出了一个新的解析模型来解释这种波导中线偏振模的空间横向分布的不对称性。这种不对称性在相邻波导之间产生偏振相关的耦合系数,这强烈影响光在晶格中的传播。我们的分析解释了如何利用这种效应来调整通过阵列传播的光的最终强度分布,并将集成光路中的偏振分束器的特性与波导的几何形状联系起来。

英文摘要:

We study the polarization properties of elliptical femtosecond-laser-written waveguides arrays. A new analytical model is presented to explain the asymmetry of the spatial transverse profiles of linearly polarized modes in these waveguides. This asymmetry produces a polarization dependent coupling coefficient, between adjacent waveguides, which strongly affects the propagation of light in a lattice. Our analysis explains how this effect can be exploited to tune the final intensity distribution of light propagated through the array, and links the properties of a polarizing beam splitter in integrated optical circuits to the geometry of the waveguides.

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