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Photobleaching of thulium-doped ZBLAN fibers with visible light

机译:visible光ZBLAN纤维的可见光光漂白

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Photobleaching of darkened thulium-doped ZBLAN fibers is observed after short exposure to visible light. The bleaching process is characterized by a stretched-exponential function of time with an exponent beta independent of both the bleaching intensity and the thulium concentration. The bleaching rate 1/tau is also shown to scale linearly with the bleaching intensity and to have a 1/3-power dependence on the thulium concentration. Incomplete and slow recovery of the color centers is observed in previously bleached fibers, suggesting the presence of at least two types of defect. (C) 1997 Optical Society of America
机译:短时间暴露于可见光后,观察到了变暗的掺-ZBLAN纤维的光漂白。漂白过程的特征在于时间的拉伸指数函数,其指数β与漂白强度和the浓度无关。还显示了漂白速率1 / tau与漂白强度成线性比例,并且对th浓度具有1/3的功率依赖性。在先前漂白的纤维中观察到色心的不完全和缓慢恢复,表明存在至少两种类型的缺陷。 (C)1997年美国眼镜学会

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