高斯光束在二维光折变晶格中的传输特性

J4 ›› 2018, Vol. 35 ›› Issue (1): 69-73.

高斯光束在二维光折变晶格中的传输特性

1. 山西运城学院物理与电子工程系
2.

收稿日期:2016-12-14 修回日期:2017-01-15 出版日期:2018-01-28 发布日期:2018-04-04
通讯作者: 苏艳丽

Propagation characteristics of Gaussian beam in two-dimensional photorefractive lattices

Received:2016-12-14 Revised:2017-01-15 Published:2018-01-28 Online:2018-04-04

摘要/Abstract

摘要： 采用交替隐式差分法研究了高斯光束在二维正方格子和贝塞尔晶格中的传输特性。结果表明：高斯光束在二维正方格子中既可以形成能量主要集中在中心区域的晶格孤子，也可以通过参数调节形成其他空间分立形态的孤子；对贝塞尔晶格，当晶格的横向尺度较小即入射高斯光束的能量主要集中在贝塞尔晶格的中心信道时，可以在一定外加电场和光伏电场参数下形成类三环孤子；逐渐增加晶格的横向尺度，可以形成单一的类环形孤子和类高斯孤子。光折变晶格孤子的多样性在全光孤子开关等方面具有潜在应用价值。

关键词: 光子晶格

Abstract: Based on two-dimensional square lattices and Bessel optical lattices, the propagation characteristics of Gaussian beam are investigated by alternative implicit differential method. The results show that the lattice soliton with most of energy concentrated in the center can form when the Gaussian beam propagate in two-dimensional square lattices, the other space discrete soliton also can form by adjusting parameters. For Bessel lattice, the three-rings-like soliton can form in the conditions of appropriate external biased field and photovoltaic field when the transverse lattice scale is smaller i.e. the most of Gaussian beam energy is concentrated in the center lattice channel. The single-ring-like and Gaussian-like soliton will form when the transverse lattice scale is increasing. The variety of photorefractive lattice solitons has some potential application value in all-optical-switching.

Key words: optical lattices

苏艳丽姜其畅聂合贤马紫微李永宏. 高斯光束在二维光折变晶格中的传输特性[J]. J4, 2018, 35(1): 69-73.

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