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Far-detuned mid-infrared frequency conversion via normal dispersion modulation instability in chalcogenide microwires

机译:硫族化物微丝中正常色散调制不稳定性引起的失谐的中红外频率转换

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摘要

We report the observation of modulation instability (MI) in the mid-infrared (mid-IR) spectral region by pumping a hybrid polymer-chalcogenide optical microwire with a femtosecond optical parametric oscillator operating at 2.6 μm. It is further shown that this MI occurs in the normal dispersion regime through negative fourth-order dispersion and leads to far-detuned parametric frequency conversion at 2 and 3.5 μm, despite the presence of a strong absorption band around 2.8 μm. Stochastic nonlinear Schrodinger equation simulations of mid-IR MI are in excellent agreement with experiments.
机译:我们报告了通过泵浦混合飞秒光学参量振荡器在2.6μm的混合聚合物-硫族化物光学微丝对中红外(mid-IR)光谱区域中调制不稳定性(MI)的观察。进一步显示,该MI在正常色散状态下通过负四阶色散发生,并且尽管存在2.8μm左右的强吸收带,但在2和3.5μm处导致失谐的参数频率转换。中红外MI的随机非线性Schrodinger方程模拟与实验非常吻合。

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