单模光纤的传输衰减随温度变化的研究

The Research of Monomode Fiber's Transmission Loss on Temperature

本文从实验上测量了单模石英光纤在－50～120℃范围内的损耗。随着温度升高，光纤的损耗随之降低，在常温附近达到最小。其后损耗随着温度的继续升高而增加。损耗的变化主要是由于杂质的吸收和微弯损耗。本文对杂质的吸收以及微弯损耗进行了数值模拟，并且从理论上定性地解释了损耗对温度的依赖关系。

The loss of monomode silica fiber in -50℃～120 ℃ is measured in this article. Fiber's loss reduces with the rising of the temperature. At the normal tempreature, the loss becomes the lowest. As the temperature keeps rising, the loss is increasing. The change of loss is due to the impurities'absorption and the microbending loss. We simulate these two kinds of loss by computer, and explain the nature of relationship between the loss and the temprature theoretically.