Snyder A W
Appl Opt. 1976 May 1;15(5):1290-4. doi: 10.1364/AO.15.001290.
The shape of the impulse reponse of a step index, multimode fiber of circular cross section with material limited by Rayleigh scattering only is nearly invariant with fiber length L, unless L is so large that the signal has suffered an enormous scattering loss. The percent fraction of pulse energy responsible for distortion by scattering approximately 8.63 (1 - n(2)(CL)/n(2)(CO)) W(dB), where W(dB) is the associated energy reduction in decibels due to scattering from the core, and n(CL), n(CO) are the refractive indexes of cladding and core, respectively. WdB is nearly equal to length in kilometers for highly transparent material.
对于仅受瑞利散射限制的圆形横截面阶跃折射率多模光纤，其脉冲响应的形状几乎与光纤长度L无关，除非L非常大以至于信号遭受了巨大的散射损耗。由散射导致脉冲能量失真的百分比约为8.63(1 - n(2)(CL)/n(2)(CO))W(dB)，其中W(dB)是由于纤芯散射导致的以分贝为单位的相关能量降低，n(CL)和n(CO)分别是包层和纤芯的折射率。对于高透明材料，WdB几乎等于以千米为单位的长度。
