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光诱导晶格中偶极孤子的研究

Research on Dipole Solitons in Optically Induced Lattices

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摘要

在光折变晶体中可通过光诱导来产生光子晶格,对偶极孤子在光子晶格中的传输特性进行研究,通过数值仿真发现,偶极光束入射到对角晶格点时,改变光折变晶体上的外加电场强度、入射振幅以及光诱导晶格深度,偶极光束的传输会出现不同的传输结果。研究结果表明,由于光诱导晶格的存在,入射偶极光束可以克服两峰间的相互作用;当外加电场强度、入射振幅和晶格深度三个条件匹配时,异相偶极孤子存在且能稳定传输,而同相偶极孤子总是不稳定的,当光束强度较低时,其不稳定性较弱。

Abstract

Photonic lattices are optically induced in photorefractive crystals and the transmission of dipole solitons in photonic lattices is studied. By means of numerical simulation, when the dipole beams are launched at the diagonal lattice sites, different transmission results of dipole beams are obtained when the intensity of bias field voltage, the intensity of beams and the depth of lattices are changed. These results show that the input dipole beams can overcome the interaction between the two humps as a result of the existence of the lattices. Under suitable conditions, out-of-phase dipole solitons exist and are stable. In contrast, in-phase dipole solitons are always instable, and the instability is weaker if the beam intensity is lower.

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中图分类号:O437

DOI:10.3788/aos201636.0719001

所属栏目:非线性光学

基金项目:国家自然科学基金(61275124,61405178,61205121)

收稿日期:2016-01-18

修改稿日期:2016-03-22

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作者单位    点击查看

杨斌:浙江工业大学信息工程学院光纤通信与信息工程研究所, 浙江 杭州 310023
覃亚丽:浙江工业大学信息工程学院光纤通信与信息工程研究所, 浙江 杭州 310023
刘鲜:浙江工业大学信息工程学院光纤通信与信息工程研究所, 浙江 杭州 310023
任宏亮:浙江工业大学信息工程学院光纤通信与信息工程研究所, 浙江 杭州 310023
薛林林:浙江工业大学信息工程学院光纤通信与信息工程研究所, 浙江 杭州 310023

联系人作者:杨斌(826882580@qq.com)

备注:杨斌(1991—),男,硕士研究生,主要从事光孤子及非线性光学方面的研究。

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