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Nonlinear propagation of a-few-optical-cycle pulses in a photonic crystal fiber-experimental and theoretical studies beyond the slowly varying-envelope approximation

机译:几个光周期脉冲在光子晶体光纤中的非线性传播-实验和理论研究超越缓慢变化的包络近似

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The evolution of spectral and temporal profiles of 4.5 optical-cycle pulses propagating near zero-dispersion wavelength (ZDW) in a photonic crystal fiber is investigated experimentally and theoretically beyond the slowly varying-envelope approximation. The excellent agreement between the experimental an theoretical results suggests that the observed gap in the spectral profile, the most distinctive feature, originates from the self-steepening effect. This effect intensifies the spectral component shorter than the ZDW with the decay of higher order solitons and consequently induces the intrapulse four-wave mixing (FWM). As a result, the anti-Stokes and Stokes components produced by the FWM enables us to generate a supercontinuum from 480 to 1020 nm.
机译:除了缓慢变化的包络近似外,还通过实验和理论研究了在光子晶体光纤中传播的接近零色散波长(ZDW)的4.5个光周期脉冲的光谱和时间分布的演变。实验结果与理论结果之间的极佳一致性表明,光谱轮廓中观察到的间隙(最鲜明的特征)源自自加深效应。随着高阶孤子的衰减,该效应增强了比ZDW短的光谱分量,因此引起了脉冲内四波混频(FWM)。结果,由FWM生产的anti-Stokes和Stokes组件使我们能够生成480至1020 nm的超连续谱。

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