共查询到18条相似文献,搜索用时 359 毫秒
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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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温度对双光子独立明-暗空间屏蔽孤子对稳定性的影响 总被引:2,自引:2,他引:0
在忽略损耗和扩散的情况下,采用数值方法研究温度对串联双光子光折变晶体回路中独立明-暗屏蔽孤子对演化和稳定性的影响.结果表明:在给定温度下晶体回路中形成稳态明-暗孤子对,当一个晶体的温度改变且温度变化不大时,另一块晶体中支持的孤子将转变为另一个稳态孤子;当温度变化过大时,这个孤子将变得不稳或发生周期性的压缩或膨胀甚至崩溃.在独立屏蔽空间孤子对中,暗孤子对温度的敏感程度比明孤子强. 相似文献
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Separate Holographic-Hamiltonian screening soliton pairs are predicted in a biased series photorefractive crystal circuit consisting of two photorefractive crystals connected electronically by electrode leads in a chain with a voltage source. The existence of four types of the separate soliton pairs: dark–dark, bright–dark, dark–bright and bright–bright in such a circuit is proved. Under the limit in which the spatial extent of the optical wave is much less than the width of the crystal, the Hamiltonian dark soliton can affect the other soliton by the light-induced current whereas the Hamiltonian bright soliton and holographic soliton cannot affect the other soliton in the soliton pair. 相似文献
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Separate spatial soliton pairs in an unbiased series two-photon photorefractive crystal circuit 总被引:1,自引:0,他引:1
Dark (bright) steady-state spatial solitons are predicted in one dimension for a series circuit consisting of two two-photon photorefractive crystals of which at least one must be photovoltaic. Each crystal can support a spatial soliton. The two solitons are known collectively as separate spatial soliton pairs with three types: dark-dark, bright-dark and bright-bright. In the limit in which the optical wave has a spatial extent much less than the width of the crystal, the dark soliton can affect the other soliton by light-induced current, but the bright soliton cannot affect the other soliton in the soliton pair. 相似文献
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This paper presents calculations for an idea in photorefractive spatial solitons, namely, a dissipative holographic soliton and a two-photon-Hamiltonian spatial soliton in one dimension form in an unbiased series photorefractive crystal circuit consisting of a single-photon photorefractive crystals and a two-photon one of which at least one must be photovoltaic. The two solitons are known collectively as a separate Holographic–Hamiltonian spatial soliton pair and there are two types: dark–dark and bright–dark if only one crystal of circuit is photovoltaic. The results show that the two-photon-Hamiltonian soliton in a soliton pair can affect the holographic one by light-induced current and the holographic soliton cannot affect the two-photon-Hamiltonian one. 相似文献
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Separate holographic screening soliton pairs in a biased series photorefractive crystal circuit 下载免费PDF全文
Holographic dark (bright) screening solitons are predicted
in one dimension for a series circuit consisting of two
photorefractive crystals connected electronically by electrode leads
in a chain with a voltage source. Each crystal can support a
holographic screening soliton. The two solitons are known
collectively as a separate holographic screening soliton pair with
three types: bright--bright, bright--dark and dark--dark. The
numerical results show that the two solitons in a soliton pair can
affect each other through a light-induced current and their coupling
can affect their spatial profiles under the limit in which the
optical wave has a spatial extent much less than the width of the
crystal. 相似文献
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Separate spatial soliton pairs in a biased series centrosymmetric photorefractive crystal circuit 总被引:1,自引:0,他引:1
It is shown theoretically that three types of separate soliton pairs: bright-bright, bright-dark, and dark-dark, can be established in a biased series circuit consisting of two centrosymmetric photorefractive crystals and the two solitons in a separate soliton pair can affect each other by the light-induced current. The effects of the intensities of soliton beams and background lights on the normalized profiles of solitons are discussed. 相似文献
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The coupling of two mutually incoherent optical beams with the same polarization and wavelength in two-photon photovoltaic photorefractive crystal is studied, it is predicted theoretically that incoherently coupled bright-dark photovoltaic spatial soliton pairs are possible due to two-photon photorefractive effect. The existing conditions of these soliton pairs in the crystal are discussed in detail. The intensity profile of these soliton pairs is shown by numerical calculation under the parameters of relevant crystal. 相似文献
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Effects of temperature on the stability of separatescreening bright--dark spatial soliton pair 下载免费PDF全文
We investigate theoretically the temperature effects on the evolution and stability
of a separate screening bright--dark soliton pair formed in a serial
non-photovoltaic photorefractive crystal circuit. Our numerical results show that,
for a stable bright--dark soliton pair originally formed in a crystal circuit at
given temperatures, when one crystal temperature changes, the soliton supported by
the other crystal will evolve into another stable soliton if the temperature change
is quite small, whereas it will become unstable and experience larger cycles of
compression or break up into beam filaments if the temperature difference is big
enough. The dark soliton is more sensitive to the temperature change than the bright
one. 相似文献