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本文从理论上研究了阶跃型折射率分布氟玻璃圆光纤的色散特性。通过大量计算,找到了几种最佳结构,这些结构可把零色散波长推展到2-5μm之间,而已经证明,氟玻璃先纤在2-5μm的损耗降低到0.001-0.1dB/km,从而达到了零色散波长和最低级限损耗波长相匹配的目的。同时,比较了各种ZrF4系红外材料的色散曲线,得出了零色散和阶跃型折射率分布氟玻璃单模光纤的光谱范围,并且得到了在三个波长处总色散为零的结论。
In this paper, the dispersion characteristics of a step-indexed refractive index Fluoro-glass circular optical fiber are theoretically studied. Through a large number of calculations, several best structures have been found, which can push the zero-dispersion wavelength to between 2 and 5 μm. It has been proved that the loss of fluorine glass pre-fibers at 2-5 μm is reduced to 0.001-0.1 dB / km, So as to achieve the zero-dispersion wavelength and the lowest level of the loss of wavelength matching purposes. At the same time, the dispersion curves of various ZrF4-based infrared materials were compared, and the spectral range of zero-dispersion and step-index fluorine glass single-mode optical fiber with refractive index distribution was obtained, and the conclusion that the total dispersion was zero at three wavelengths was obtained.