Channel waveguides fabrication in bulk Lithium Niobate using femtosecond pulses,张双根,姚江宏 ,Channel waveguides in Z-cut bulk congruent LiNbO3 have been fabricated with a femtosecond laser. The propagation loss in waveguides is lower than 1dB/cm.
2024-02-27 16:06:21 635KB 首发论文
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GdFeCo薄膜中fs激光诱导的反常磁滞回线起源研究,徐初东,陈志峰,本实验设计了可控泵浦脉冲数磁光Kerr探测技术初始化磁场扫描相结合的方法用于消除外磁场磁化历史产生的记忆效应以及连续脉冲激发�
2024-02-27 16:05:06 230KB 首发论文
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飞秒激光表面微结构化镍钛合金,杨阳,杨建军,我们在空气的环境中通过飞秒激光划刻镍钛合金表面的实验来研究一种自组织亚波长结构形成的特点。实验发现一种方向与激光偏振垂直
2024-02-27 16:00:40 507KB 首发论文
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The paper presents an improved method for the deinterleaving of radar signals, based on a time of arrival analysis and the use of the sequential difference histogram (SDIF) for determining the pulse repetition interval (PRI). The optimal detection threshold in the SDIF histogram is derived, which greatly contributes to the efficiency of the algorithm. The algorithm is applied to classic, frequency-agile and staggered PRI radar signals. It is shown that the new method is very successful in high-pulse-density radar environments and for complex signal types. Special attention is given to an application of this method to the multiple-parameter deinterleaving algorithm.
2022-03-28 21:29:33 676KB sdif; deinterleaving; radar pulses
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Five conical harmonic beams are generated from the interaction of femtosecond mid-infrared (mid-IR) pulses at a nominal input wavelength of 1997 nm with a 2D LiNbO3 nonlinear photonic crystal with Sierpinski fractal superlattices. The main diffraction orders and the corresponding reciprocal vectors involved in the interaction are ascertained. Second and third harmonics emerging at external angles of 23.82° and 36.75° result from nonlinear ?erenkov and Bragg diffractions, respectively. Three path
2021-05-30 18:40:32 561KB
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We theoretically propose a new method for generating intense isolated attosecond pulses during high-order harmonic generation (HHG) process by accurately controlling electron motion with a two-color laser field, which consists of an 800-nm, 4-fs elliptically polarized laser field and a 1400-nm, ~43-fs linearly polarized laser field. With this method, the supercontinua with a spectral width above 200 eV are obtained, which can support a ~15-as isolated pulse after phase compensation. Classical an
2021-02-26 09:06:25 708KB 单个阿秒 高次谐波 双色场 190.4160
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