We propose and investigate theoretically the Kerr squeezing of light at a wavelength of 2 µm in chalcogenide fibers with large nonlinearity and—this is the advance—with much reduced attenuation. We present suitably realistic but straightforward designs of low-loss step-index single-mode fibers with the nonlinear Kerr coefficient 3 to 4 orders of magnitude higher than for standard telecommunication fibers, and we give estimations of optimal squeezing for continuous wave laser signal in the considered fibers based on ${{\rm As}_2}{{\rm S}_3}$ or ${{\rm As}_2}{{\rm Se}_3}$ glasses.

中文翻译：

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克尔挤压用硫族化物纤维

我们提出并从理论上研究非线性大的硫族化物纤维中2 µm波长的Kerr压缩，这是进步，衰减大大降低。我们提出了低损耗阶跃折射率单模光纤的适当现实但直接的设计，其非线性Kerr系数比标准电信光纤高3到4个数量级，并且给出了连续波激光信号在光纤中的最佳压缩估计。被视为基于$ {{\ rm As} _2} {{\ rm S} _3} $或$ {{\ rm As} _2} {{\ rm Se} _3} $眼镜的光纤。