共查询到18条相似文献,搜索用时 93 毫秒
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光折变聚合物中的小振幅空间光孤子 总被引:1,自引:1,他引:0
给出了稳态条件下光折变聚合物中的小振幅空间孤子的演化方程,得到了方程的暗、亮孤子解析解,并且给出了小振幅聚合孤子的宽度表达式结果表明,光折变聚合物中存在着双曲正切形式的小振幅暗空间孤子和双曲正割形式的小振幅亮空间孤子,小振幅聚合孤子的宽度与外加电场成反比关系. 相似文献
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对外加电场光折变有机聚合物串联回路中独立空间孤子对进行了理论研究,导出了在光折变有机聚合物串联回路中两光束传播的耦合方程,证明了串联回路中存在暗-暗、明-暗和明-明三种独立空间孤子对.在光束的空间展宽远小于有机聚合物宽度的极限条件下,暗-暗孤子对之间孤子入射光强的改变可相互影响到对方的包络和动态演化.对于明-暗孤子对,暗孤子通过光电流能影响明孤子,但明孤子不能影响暗孤子.明-明孤子对之间没有影响.
关键词:
非线性光学
光折变效应
光折变聚合物
空间孤子对 相似文献
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This paper predicts that grey spatial solitons can exist in
two-photon photorefractive materials. In steady state and under
appropriate external bias conditions, it obtains the grey spatial
soliton solutions of the optical wave evolution equation. The
intensity profile, phase distribution,and transverse velocity of
these grey solitons are discussed. 相似文献
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Low-amplitude Screening-photovoltaic Spatial Solitons in Biased Photovoltaic Photorefractive Crystals 总被引:1,自引:0,他引:1
1 Introduction Photorefractivespatialsolitonshaveattractedgreatattentioninthepastyears[1~ 11] .Theyhavebecomeoneofconsiderablesubjectsinphotorefractivenonlinearoptics .Uponillumination ,photorefractivematerialscansetupspace chargefieldincrystals,whichwilli… 相似文献
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The low-amplitude spatial solitons in biased photovoltaic photorefractive crystals are investigated theoretically. The analytical solutions for both the bright and the dark low-amplitude screening-photovoltaic spatial solitons in photorefractive crystals are obtained. The expressions for the width of these solitons are given. The explicit expressions for the spatial deflection and angular deviation of the bright low-amplitude screening-photovoltaic spatial soliton are also presented by taking into account the effect of diffusion. 相似文献
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A universal theory of steady-state one-dimensional photorefractive spatial solitons is developed which applies to the steady-state one-dimensional photorefractive solitons under various realizations, including the screening solitons in a biased photorefractive medium, the photovoltaic solitons in open- and closed-circuit photovoltaic-photorefractive media and the screening-photovoltaic solitons in biased photovoltaic-photorefractive media. Previous theories advanced individually elsewhere for these solitons can be obtained by simplifying the universal theory under the appropriate conditions. 相似文献
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LU Keqing ZHANG Yanpeng TANG Tiantong HOU Xun WU Hongcai Department of Electronic Science Technolog Xi’an Jiaotong University Xi’an China Department of Applied Physics Xidian Un 《Chinese Journal of Lasers》2001,10(3):223-227
1 Introduction Steady statephotorefractive (PR)spatialsolitons[1~ 3] havebeeninvestigatedextensivelyinthepastfewyears.Atpresentthesearetwodifferentkindsofsteady statePRsolitons :screening[1 ,2 ] solitonsandphotovoltaic (PV) [3]solitons.Morerecently ,wehaveshowntheo… 相似文献