Natural population inversion in a gaseous molecular filament

被引：37

作者：

Chin, See Leang ^{[1
,2
]}

Xu, Huailiang ^{[3
]}

Cheng, Ya ^{[4
]}

Xu, Zhizhan ^{[4
]}

Yamanouchi, Kaoru ^{[5
]}

机构：

[1] Univ Laval, Dept Phys, Quebec City, PQ G1V 0A6, Canada

[2] Univ Laval, Ctr Opt Photon & Laser, Quebec City, PQ G1V 0A6, Canada

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

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

[5] Univ Tokyo, Dept Chem, Sch Sci, Bunkyo Ku, Tokyo 1130033, Japan

来源：

CHINESE OPTICS LETTERS | 2013年 / 11卷 / 01期

基金：

中国国家自然科学基金; 加拿大自然科学与工程研究理事会;

关键词：

STANDOFF SPECTROSCOPY; AIR;

D O I：

10.3788/COL201311.013201

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose a new mechanism/scheme to explain the ultrafast population inversion of molecular ions which takes place in a time scale comparable to the femtosecond laser pulse. The nonlinear pumping process including the pump photons and the self-generated harmonic photons of the pump laser would be responsible for building up population inversion to realize remote molecule lasers in femtosecond laser filaments in gases. It is shown that the remote laser emissions in molecular ions of gases may be a universal process in the femtosecond laser filament.

引用

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