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arXiv 2306.09511physics.opticsnlin.PS
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在具有自聚焦和自散焦非线性的三阶非线性复合介质中产生多个超短孤子

Generation of multiple ultrashort solitons in a third-order nonlinear composite medium with self-focusing and self-defocusing nonlinearities

André C. A Siqueira, Edilson L. Falcão-Filho, Boris A. Malomed, Cid B. de Araújo

AI总结:

本文提出利用自聚焦与自散焦波导段交替的一维复合介质,通过多重时间压缩过程可控产生多个超短时间孤子串,并揭示脉冲内拉曼散射的关键作用。

摘要:

对飞秒高斯脉冲在一维复合介质中传播的理论研究表明,当光脉冲先在自聚焦(SF)段传播、随后进入自散焦(SDF)段时,可以预言产生亮孤子串。该复合介质由具有正常群速度色散的自聚焦和自散焦波导段交替组成。基于这一结构的多重时间压缩(MTC)过程为可控产生多个超短时间孤子提供了一种方法。对模拟该系统的广义非线性薛定谔方程进行数值求解表明,脉冲内拉曼散射在时间和光谱动力学中起主要作用。文中还讨论了具有不同中心波长的超短孤子之间的碰撞。本文首次提供了一种通过入射光脉冲在复合介质中传播来产生可控超短时间孤子串的方法。

英文摘要:

Theoretical consideration of the propagation of femtosecond-Gaussian pulses in a 1D composite medium, consisting of alternating self-focusing (SF) and self-defocusing (SDF) waveguide segments with normal group-velocity dispersion predicts the generation of trains of bright solitons when an optical pulse first propagates in the SF segment, followed by the SDF one. The multiple temporal compression (MTC) process, based on this setting, offers a method for controllable generation of multiple ultrashort temporal solitons. Numerical solutions of the generalized nonlinear Schrödinger equation modeling this system demonstrate that the intrapulse Raman scattering plays a major role in the temporal and spectral dynamics. Collisions between ultrashort solitons with different central wavelengths are addressed too. The paper provides, for the first time, a procedure for producing controllable trains of ultrashort temporal solitons by incident optical pulses propagating in a composite medium.

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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