Optimizing high harmonic generation in absorbing gases:: Model and experiment
Optimizing high harmonic generation in absorbing gases:: Model and experiment
复制标题
DOI：
10.1103/physrevlett.82.1668
复制
发表时间：
1999-02-22
影响因子：
8.6
通讯作者：
Agostini, P
中科院分区：
文献类型：
--
作者：
Constant, E;Garzella, D;Agostini, P
我们研究吸收和色散原子气体介质的一般情况下的高次谐波产生。对于超短激光脉冲，谐波转换效率往往会受到气体中谐波重吸收的限制。该限制与气体密度无关，对于松散聚焦光束或在充气空心光纤中引导的光束的情况是相同的。在最佳条件下，我们使用 40 fs、1.5 mJ、800 nm 脉冲和 1 kHz 重复率测量了氙产生的 15 次谐波的迄今为止最高转换效率 (4 X 10(-5))。
We study high-order harmonic generation in the general case of absorbing and dispersive atomic gas media. For ultrashort laser pulses, the harmonic conversion efficiency tends to a limit mainly imposed by the harmonic reabsorption in the gas. This limit, independent on the gas density, is the same for both the case of a loosely focused beam or a beam guided in a gas-filled hollow-core fiber. Under optimum conditions, we measured the highest conversion efficiency to date (4 X 10(-5)) for the 15th harmonic generated in xenon using a 40 fs, 1.5 mJ, 800 nm pulse at a 1 kHz repetition rate.