Polarization ellipticity dependence of N2+ air lasing: the role of coupling between the ground state and a photo-excited intermediate state

被引：10

作者：

Wan, Yuexin ^{[1
,3
]}

Xu, Bo ^{[1
,3
]}

Yao, Jinping ^{[1
]}

Chen, Jinming ^{[1
,3
,4
]}

Liu, Zhaoxiang ^{[1
,3
]}

Zhang, Fangbo ^{[1
,3
]}

Chu, Wei ^{[1
]}

Cheng, Ya ^{[1
,2
,5
]}

机构：

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

[2] East China Normal Univ, State Key Lab Precis Spect, Shanghai 200062, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[4] ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 200031, Peoples R China

[5] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2019年 / 36卷 / 10期

基金：

中国国家自然科学基金;

关键词：

LASER FIELDS; GENERATION; NITROGEN;

D O I：

10.1364/JOSAB.36.000G57

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We experimentally investigate the dependence of N-2(+) lasing radiation on the ellipticity of an 800 nm pump laser. The results show that 391 and 428 nm lasing signals exhibit different behaviors with the change of ellipticity. The 391 nm lasing signals show abnormal ellipticity dependence regardless of the pump intensity, whereas for the 428 nm lasing signals, the abnormal characteristic only occurs at a high laser intensity. The qualitative analysis reveals that the physical origin of the phenomenon is the postionization coupling between the ground X-2 Sigma(+)(g) state and the intermediate A(2) Pi(u) state of N-2(+) ions. (C) 2019 Optical Society of America

引用

页码：G57 / G61

页数：5