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首页> 外文期刊>Journal of optics, A. Pure and applied optics: journal of the European Optical Society >Observation of dark spatial photovoltaic solitons in planar waveguides in lithium niobate
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Observation of dark spatial photovoltaic solitons in planar waveguides in lithium niobate

机译：铌酸锂平面波导中暗空间光伏孤子的观测

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摘要

We have obtained photovoltaic lenses and dark spatial solitons in planar optical waveguides in lithium niobate doped with iron and copper. For TE modes of lower indices the photovoltaic nonlinearity only partly decreased the width of a dark notch within the outcoupled image of the recording light beam. The corresponding time to reach a steady state of this light-induced charge ranged from about 0.1 to 30 s depending on the waveguide sample. For higher modes we observed a full compensation of the divergence of the dark notch on a time scale of some minutes. In some cases this was followed by an extinction of the dark solitons because the light was over-defocused in the highest modes.
机译：我们已经在掺杂铁和铜的铌酸锂的平面光波导中获得了光伏透镜和暗空间孤子。对于较低折射率的TE模式，光伏非线性仅部分地减小了记录光束的耦合图像内的暗凹口的宽度。取决于波导样本，达到该光感生电荷的稳态所需的相应时间约为0.1到30 s。对于更高的模式，我们在几分钟的时间范围内观察到了暗陷波的发散的完全补偿。在某些情况下，这之后是暗孤子的灭绝，因为在最高模式下光线过度散焦。

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