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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Dispersion tailoring of photonic crystal fibers for flat-top, coherent, and broadband supercontinuum generation
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Dispersion tailoring of photonic crystal fibers for flat-top, coherent, and broadband supercontinuum generation

机译：光子晶体纤维的分散剪裁，用于平板，相干，宽带超强素

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摘要

A double-clad AsSe2-based photonic crystal fiber possessing ultra-flat near-zero dispersion has been introduced, here to achieve flat-top and coherent supercontinuum generation at Mid-IR range. Also, the required conditions to obtain flat-top, broadband, and coherent supercontinuum generation have been discussed based on the systematic study carried out here, by GNLSE regarding the input pump pulse characteristics and the dispersion regime. The proposed photonic crystal fiber in this study, presents nearly-zero all-normal dispersion of about D similar to -3.4 ps(nm.km)(-1) corresponding to minimum group velocity dispersion at 6.9 mu m. For the pump pulse with lambda = 6.9 mu m, time duration of T = 50 fs, and low peak power of P = 1 kW, a coherent flat-top supercontinuum generation has been realized with the span of 4.14 mu m and 4.97 mu m at 8 dB and 20 dB levels, respectively. Moreover, a figure of merit covering the essential characteristics of supercontinuum generation spectra (bandwidth, coherency, and flatness) has been introduced to compare the performance of different structures. It has been shown that beta(2) tailoring with near-zero and flat characteristic is essential to achieve higher figure of merit.
机译：已经介绍了具有超扁平零点分散体的双包装ASSE2的光子晶体纤维，在这里介绍了在中外IR范围内实现平顶和相干的超连续。此外，通过关于输入泵脉冲特性和色散制度的基于这里进行的系统研究，已经讨论了获得平顶，宽带和相干超强突发生的所需条件。本研究中提出的光子晶体纤维，与6.9μm下的最小群速度分散相对于最小群速度分散，呈现与-3.4 ps（nm.km）（ - 1）的几乎归零的全正常分散体。对于具有Lambda =6.9μm的泵脉冲，T = 50 fs的持续时间，P = 1 kW的低峰值功率，已经实现了4.14 mu m和4.97 mu m的跨度分别为8 dB和20 dB水平。此外，还引入了涵盖超连续谱（带宽，一致性和平整度）的基本特征的优点图，以比较不同结构的性能。已经表明，具有接近零和平坦特性的β（2）剪裁对于实现更高的优点来说是必不可少的。

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