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arXiv physics/0606111physics.optics
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宽带脉冲传输:拉曼相互作用的单场和多场方法

Wideband pulse propagation: single-field and multi-field approaches to Raman interactions

P. Kinsler, G. H. C. New

摘要:

我们模拟了超宽带光产生的过程,其中由拉曼频率分离的一对激光脉冲驱动拉曼跃迁。与通常的方法不同的频率分量使用单独的场包络,我们把场作为一个单一的实体。这就需要对脉冲传播进行几个周期的修正。我们的单场模型使得近似更少,并且在数学上(因此在计算上)更简单,尽管它确实需要更多的计算资源来实现。通过适当的近似,单场论可简化为传统的多场论。

英文摘要:

We model the process of ultra broadband light generation in which a pair of laser pulses separated by the Raman frequency drive a Raman transition. In contrast to the usual approach using separate field envelopes for the different frequency components, we treat the field as a single entity. This requires the inclusion of few-cycle corrections to the pulse propagation. Our single-field model makes fewer approximations and is mathematically (and hence computationally) simpler, although it does require greater computational resources to implement. The single-field theory reduces to the traditional multi-field one using appropriate approximations.

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