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Spectral interferometry-based chromatic dispersion measurement of fibre including the zero-dispersion wavelength

机译:包含零色散波长的基于光谱干涉法的光纤色散测量

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We report on a simple spectral interferometric technique for chromatic dispersion measurement of a short length optical fibre including the zero-dispersion wavelength. The method utilizes a supercontinuum source, a dispersion balanced Mach-Zehnder interferometer and a fibre under test of known length inserted in one of the interferometer arms and the other arm with adjustable path length. The method is based on resolving one spectral interferogram (spectral fringes) by a low-resolution NIR spectrometer. The fringe order versus the precise wavelength position of the interference extreme in the recorded spectral signal is fitted to the approximate function from which the chromatic dispersion is obtained. We verify the applicability of the method by measuring the chromatic dispersion of two polarization modes in a birefringent holey fibre. The measurement results are compared with those obtained by a broad spectral range (500-1600 nm) measurement method, and good agreement is confirmed.
机译:我们报告了一种简单的光谱干涉技术,用于短长度光纤的色散测量,包括零色散波长。该方法利用超连续谱源,色散平衡的马赫曾德尔干涉仪和已知长度的被测光纤插入干涉仪臂中的一个而另一臂中的光程可调。该方法基于通过低分辨率NIR光谱仪解析一个光谱干涉图(光谱条纹)的方法。条纹阶数与所记录的光谱信号中极端干扰的精确波长位置之间的关系适合于近似函数,从中可以得到色散。我们通过测量双折射有孔光纤中两个偏振模的色散来验证该方法的适用性。将测量结果与通过宽光谱范围(500-1600 nm)测量方法获得的结果进行比较,证实了良好的一致性。

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