Rare earth-doped core optical fiber and manufacturing method thereof
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机译:稀土掺杂芯光纤及其制造方法
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摘要
A rare earth-doped core optical fiber of the present invention includes a core comprising a silica glass containing at least aluminum and ytterbium, and a clad provided around the core and comprising a silica glass having a lower refraction index than that of the core, wherein the core has an aluminum concentration of 2% by mass or more, and ytterbium is doped into the core at such a concentration that the absorption band which appears around a wavelength of 976 nm in the absorption band by ytterbium contained in the core shows a peak absorption coefficient of 800 dB/m or less.
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机译:本发明的稀土掺杂芯光纤包括:芯,该芯包括至少包含铝和的石英玻璃;以及包层,该包层设置在该芯周围,并且包括折射率比该芯的折射率低的石英玻璃。芯中的铝浓度为2质量%以上,并且is以使芯中所含in在吸收带中出现在976nm波长附近的吸收带显示峰值的浓度掺杂到芯中。吸收系数为800 dB / m以下。
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