聚合物增益介质固态染料激光器中泵浦重复频率对染料光稳定性的影响

S. Popov
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引用次数: 6

摘要

研究了泵浦重复频率对掺杂染料Rh6G的聚合物增益材料的转换效率和光稳定性的影响。讨论了由于高泵浦重复率而引起的宿主聚合物基体加热对化学反应的影响,从而导致染料光破坏。这种加热似乎对聚合物增益材料的光稳定性有相当大的影响。由于增益材料的弱散热和增益介质的加热导致染料扩散速率的增加,从而导致染料分子从泵送体积中迁移,这是第一次报道和讨论。讨论了聚合物基体中低分子量添加剂对提高聚合物增益材料光稳定性的作用。
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Influence of pump repetition rate on dye photostability in a solid-state dye laser with a polymeric gain medium
The influence of pump repetition rate on the conversion efficiency and photostability of a polymeric gain material doped with the dye Rh6G is studied. The effect of heating of the host polymeric matrix due to the high pump repetition rate in the stimulation of chemical reactions, leading to dye photodestruction, is discussed. Such heating appears to influence the polymeric gain material photostability considerably. The increase of the diffusion rate of the dye due to weak heat dissipation in the gain material and heating of the gain medium, consequently resulting in the migration of dye molecules from a pumped volume, is reported and discussed for the first time. The role of additives with low molecular weights in the polymeric matrix in increasing the photostability of the polymeric gain material is discussed.
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