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Measurement of fiber non-linearity based on four-wave mixing with an ASE source

机译：基于四波混频和ASE光源的光纤非线性测量

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A new four-wave mixing scheme to practically measure the non-linear coefficient of fibers is introduced. A single erbium-doped fiber amplifier is used to create the two wavelengths for the four-wave mixing inputs, which are pre-spectrally sliced via fiber Bragg grating filters. The proposed scheme avoids the Brillouin backscattering, rendering this a more accurate method to determine fiber nonlinearities than conventional coherent FWM systems. Furthermore, the generated FWM seed beams are pure and ultra-narrow, and can therefore be treated as coherent light. Consequently, accurate degeneracy factor can also be taken into consideration. (C) 2016 Elsevier Inc. All rights reserved.
机译：介绍了一种新的四波混频方案，可以实际测量纤维的非线性系数。单个掺do光纤放大器用于为四波混频输入创建两个波长，这些波长通过光纤布拉格光栅滤光片进行预光谱切片。所提出的方案避免了布里渊反向散射，使得该方法比常规相干FWM系统更准确地确定光纤非线性。此外，所生成的FWM种子束是纯净且超窄的，因此可以将其视为相干光。因此，也可以考虑精确的简并因子。 （C）2016 Elsevier Inc.保留所有权利。

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