fundamental mode cutoff wavelength
fundamental mode cutoff wavelength
基模截止波长
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The index of the core is a little smaller than that of the cladding base material, so the fundamental mode loss of short wavelength increases rapidly and leads to the mode cutoff.
这种光纤的纤芯折射率比包层基质折射率小，所以短波长时基模损耗迅速增大，使得光传输截止。
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