问题描述：
英语翻译
A simple profile such as a step index matched cladding profile [Fig.8(a)] or a step index depressed cladding profile [Fig.8(b)] is sufficient for standard single-mode fiber designs .
the step index profile是“阶跃折射率分布”的意思,这里又不太像,
While it is possible to use a simple step index profile to shift the zero dispersion
wavelength to 1550 nm,…………
the step index profile
A simple profile such as a step index matched cladding profile [Fig.8(a)] or a step index depressed cladding profile [Fig.8(b)] is sufficient for standard single-mode fiber designs .
the step index profile是“阶跃折射率分布”的意思,这里又不太像,
While it is possible to use a simple step index profile to shift the zero dispersion
wavelength to 1550 nm,…………
the step index profile
问题解答：
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