考虑到光纤在弯曲后由于内应力的作用会引起的折射率改变，对单模光纤弯曲损耗的理论模型进行了修正，并将修正前后的理论模型的计算结果与实验结果进行比较．结果表明，修正后的理论模型计算结果更加符合实验值，这为分析强弯曲状态下单模光纤的导光特性提供了重要的参考依据．

Considering the refractive index change of bending fiber relative to straight fiber due to internal stress of bending fiber,bending loss model of mono-mode fiber was modified. On the basis of modification,the three results were compared,i. e.,experimental data obtained by other authors,corrected and uncorrected theoretical results. The result shows that the corrected results accord with experimental data well. It will provide as an important reference for analyzing transmission characteristics of light in strong bending mono-mode fibers.