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。
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.
实验结果发现：电子辐照后器件响应光谱在短波处有变窄的趋势，但响应峰值波长和截止波长基本无变化；
It's been observed that after irradiation, the response spectra of detectors become narrower at shot wavelength while the peak and cut-off wavelength have no noticeable change.
实验结果发现：电子辐照后器件响应光谱在短波处有变窄的趋势，但响应峰值波长和截止波长基本无变化；
It's been observed that after irradiation, the response spectra of detectors become narrower at shot wavelength while the peak and cut-off wavelength have no noticeable change.
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