光纤出射光强分布研究

Measurement of light intensity distribution transmitting from optical fiber

对多模光纤出射光束的光强分布用横向位移法进行了理论分析和实验研究,并用数值计算的方法分析实验测量数据.结果表明,高斯光束可以很好地描述光纤出射光强的分布,光纤出射光束光强分布参数主要与光纤芯径和出纤光功率等有关,为强度调制型光纤传感器的优化研制提供了必要的实验依据.

In order to obtain experiment information and the calculating method for the design of intensity modulation optical fiber sensors optimally, the light intensity distribution leaving from multimode optical fiber has been studied theoretically and measured with the radial displacement method experimentally. The measurement data were numerically evaluated with a one dimension integrating formula. It has been shown that the Gaussian beam can be used to well describe the light intensity distribution of the light transmitting from multimode optical fiber, and the distribution parameters of the beam were mainly affected by the fiber core diameter and the beam power in the fiber. These results provide useful data for the research and design of intensity modulation optical fiber sensors.