Multiwavelength amplified harmonic emissions from carbon dioxide pumped by mid-infrared femtosecond laser pulses

被引：35

作者：

Chu, Wei ^{[1
,3
]}

Zeng, Bin ^{[1
,3
]}

Yao, Jinping ^{[1
]}

Xu, Huailiang ^{[2
]}

Ni, Jielei ^{[1
,3
]}

Li, Guihua ^{[1
,3
]}

Zhang, Haisu ^{[1
,3
]}

He, Fei ^{[1
]}

Jing, Chenrui ^{[1
,3
]}

Cheng, Ya ^{[1
]}

Xu, Zhizhan ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, State Key Lab High Field Laser Phys, Shanghai 201800, Peoples R China

[2] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun 130012, Peoples R China

[3] Chinese Acad Sci, Grad Sch, Beijing 100080, Peoples R China

来源：

EPL | 2012年 / 97卷 / 06期

基金：

中国国家自然科学基金;

关键词：

ALIGNED MOLECULES; LASING ACTION; GENERATION; AIR; FILAMENTATION; SPECTROSCOPY; PRESSURE; ORBITALS;

D O I：

10.1209/0295-5075/97/64004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate multiwavelength amplified harmonic emissions in carbon dioxide gas driven by intense mid-infrared femtosecond laser pulses. The simultaneous amplified emissions at 315, 326, 337 and 351 nm from the A(2)Pi(u)-X-2 Pi(g) transition of CO2+ are found to have a high gain coefficient of similar to 4.43 cm(-1) with the polarizations parallel to that of the pump laser. This is ascribed to the seeding effect by the third harmonic of pump laser. The coherence property of the amplified harmonic emissions is further evidenced by its diffraction pattern. Copyright (C) EPLA, 2012

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页数：5

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