Low-threshold amplification of vacuum-ultraviolet radiation in bichromatically driven Kr gases
Low-threshold amplification of vacuum-ultraviolet radiation in bichromatically driven Kr gases
复制标题
双色驱动氪气体中真空紫外辐射的低阈值放大
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
F. Kannari
中科院分区：
文献类型：
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作者：
M. Takeoka;T. Nakata;F. Kannari
研究了一种新的包括亚稳态在内的双色耦合三个上态的低阈值放大方案。基于模型计算，在探测到的跃迁过程中，可以在没有布居反转的情况下放大Kr气体中的相干真空紫外光发射。因此，在该系统中，与用于激光的介质(例如，Kr)相同的介质可以用作非相干泵浦源。当探测跃迁的自发辐射被两个强耦合激光通过在上态的布居俘获来调制时，可以获得低阈值放大。讨论了在该模型中真空紫外光发射连续放大的可能性。
A novel low-threshold amplification scheme for bichromatically coupling three upper states including a metastable state is investigated. Based on model calculations, it is possible to amplify coherent vacuum-ultraviolet emission in Kr gases without population inversion at the probed transition. In this system, therefore, media that are the same as those used for lasing (e.g., Kr) can be used as the incoherent pumping source. The low-threshold amplification is attained when the spontaneous emission at the probed transition is modulated through population trapping in the upper states by two intense coupling lasers. The possibility of continuous amplification of vacuum-ultraviolet emission in this model is discussed.