高斯光束在二维光折变晶格中的传输特性  

Propagation characteristics of Gaussian beam in two-dimensional photorefractive lattices

作　　者：苏艳丽[1] 姜其畅[1] 聂合贤[1] 马紫微[1] 李永宏[1] 

机构地区：[1]运城学院物理与电子工程系,山西运城044000

出　　处：《量子电子学报》2018年第1期69-73,共5页Chinese Journal of Quantum Electronics

基　　金：山西省自然科学基金;2011011003-2;运城学院博士科研基金;YQ-2015011~~

摘　　要：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传输时可形成能量主要集中在中心区域的晶格孤子,也可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,当其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。The propagation characteristics of Gaussian beam in two-dimensional square lattices and Bessel optical lattices are investigated by alternative implicit differential method. Results show that the lattice solitons with most of energy concentrated in the center can be formed when Gaussian beam propagates in two-dimensional square lattices, and other space discrete solitons can also be formed by adjusting parameters. For Bessel lattice, when the lateral scale is smaller, that is to say, the incident Gaussian beam energy is mainly concentrated in the central channel of Bessel lattice, three-rings-like solitons can be formed with certain applied electric field and photovoltaic field. The single-ring-like and Gaussian-like solitons can be formed with the gradually increasing of crystal lattice transverse scale. The diversity of photorefractive lattice solitons has potential application value in the field of all optical soliton switching.

关 键 词：非线性光学 高斯光束 光折变效应 光子晶格 

分 类 号：O437[机械工程—光学工程]