Control of third harmonic generation by plasma grating generated by two noncollinear IR femtosecond filaments.
Control of third harmonic generation by plasma grating generated by two noncollinear IR femtosecond filaments.
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DOI：
10.1364/oe.20.008837
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发表时间：
2012-04
期刊：
影响因子：
3.8
通讯作者：
Zuoye Liu;P. Ding;Yanchao Shi;Xingming Lu;Shaohua Sun;Xiaoliang Liu;Qingchao Liu;B. Ding;Bi-tao Hu
中科院分区：
文献类型：
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作者：
Zuoye Liu;P. Ding;Yanchao Shi;Xingming Lu;Shaohua Sun;Xiaoliang Liu;Qingchao Liu;B. Ding;Bi-tao Hu
由两根飞秒细丝组成等离子体光栅，并给出了探测细丝对等离子体光栅的影响。利用等离子体光栅研究了探测灯丝产生的三次谐波(TH)的增强作用，与单根探针丝相比，TH提高了三个数量级以上。研究了TH的产生与时间延迟、等离子体光栅的空间周期、相对偏振以及探测光与两泵浦光的交叉位置等因素的关系。还研究了探测丝与等离子体光栅相互作用产生的TH光谱展宽。
A plasma grating is formed by two femtosecond filaments, and the influence of probe filament on the plasma grating is shown. By using the plasma grating, the enhancement of the third harmonic (TH) generated from the probe filament is studied, and more than three orders of magnitude enhancement of TH generation is demonstrated as compared with that obtained from a single filament. The dependences of TH generation on the time delay, the spatial period of plasma grating, the relative polarization and the crossing position between the probe beam and the two pump beams are investigated. The spectral broadening of TH generated from the probe filament induced by the interaction between the probe filament and the plasma grating is also studied.