材料科学
玻璃纤维
扩散
光学
纤维
光纤激光器
热的
光纤
杂质
激光器
氟化物
热扩散率
复合材料
热力学
化学
无机化学
物理
有机化学
作者
Nicolas Caron,Martin Bernier,Dominic Faucher,Réal Vallée
出处
期刊:Optics Express
[The Optical Society]
日期:2012-09-13
卷期号:20 (20): 22188-22188
被引量:74
摘要
When the tip of a fluoride glass fiber is exposed to ambient air, water vapor reacts with the glass constituents, increasing the OH contaminants at the surface. These OH impurities then diffuse inside the glass according to Fick's laws. Laser radiation at around 3 µm is strongly absorbed by the OH contaminants, causing local heating of the fiber tip resulting in an increase of the diffusion process which ultimately leads to fiber tip destruction. We accurately model this phenomenon by combining the diffusion theory with a basic thermal equation. Experimental measurements are in agreement with the model predictions for a good range of operating conditions.
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