arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1503.04336physics.opticscond-mat.mes-hallphysics.class-ph
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弱耦合光子晶体波导中光脉冲的非线性全光数字放大

Nonlinear All Optical Digital Amplification of the Light Pulse in Weakly Coupled Photonic Crystal Waveguides

Vakhtang Jandieri, Ramaz Khomeriki

摘要:

提出了利用弱耦合双非线性光子晶体波导实现光脉冲的全光放大。我们考虑柱型PCW,它由周期性分布的圆形棒制成的克尔型电介质材料。计算了对称模和反对称模的色散图。工作频率被适当地选择为位于模式的色散图的边缘。在线性情况下,在该频率下没有传播模式被激发,然而,在非线性介质的情况下,当注入信号的幅度超过某个阈值时,形成孤子,并且它们在耦合的非线性PCW内传播。详细研究了光脉冲在耦合非线性光子晶体波导中传输的近场分布和记录信号的输出功率。在发射信号的各种幅度下计算放大系数。结果生动地展示了弱耦合非线性光子晶体波导作为全光数字放大器的有效性。

英文摘要:

All-optical amplification of the light pulse in a weakly coupled two nonlinear photonic crystal waveguides (PCWs) is proposed. We consider pillar-type PCWs, which consist of the periodically distributed circular rods made from a Kerr-type dielectric material. Dispersion diagrams of the symmetric and antisymmetric modes are calculated. The operating frequency is properly chosen to be located at the edge of the dispersion diagram of the modes. In the linear case no propagation modes are excited at this frequency, however, in case of nonlinear medium when the amplitude of the injected signal is above some threshold value, the solitons are formed and they are propagating inside the coupled nonlinear PCWs. Near field distributions of the light pulse propagation inside the coupled nonlinear PCWs and the output powers of the registered signals are studied in a detail. The amplification coefficient is calculated at the various amplitudes of the launched signal. The results vividly demonstrate the effectiveness of the weakly coupled nonlinear PCWs as all-optical digital amplifier.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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