单膜光纤弯曲损耗的实验测量与分析

测量了1 310nm和1 550nm波长下单膜光纤弯曲半径变化引起的弯曲损耗,分析比较了2种不同波长光和弯曲半径对弯曲损耗的影响.测量结果表明,弯曲损耗系数会随着弯曲半径的增大而减小,并且出现振荡现象.在弯曲半径较大时,弯曲损耗的变化比较平缓,1 550nm波长较1 310nm波长弯曲损耗更易产生,在弯曲半径较小时,弯曲损耗出现剧烈振荡,2种光波长对弯曲损耗的敏感程度交替变大.

Experimental Measurement and Analysis of Monofilm Optical Fiber Bend Loss

The changes of bending loss in 1 310 nm wavelength and 1 550 nm wavelength with different bending radius of optical fiber is measured,and the effect of different working wavelength light and bending radius in optical fiber on bending loss is compared.The result shows that the bending loss coefficient decreases with the increase of bending radius,withthe oscillation phenomenon appearing；in large bending radius,bending loss changes gently,but the bending loss is more likely to occurin 1 550 nm wavelength than in 1 310 nm wavelength.The bending loss show sharp oscillation with small bending radius.At this time,the sensitivity of two optical wavelengths to the bending loss become large alternately.