Air lasing: Phenomena and mechanisms<xref rid="cpb_28_11_114204fn1" ref-type="fn">*</xref><fn id="cpb_28_11_114204fn1"><label>*</label><p>Project supported by the National Natural Science Foundation of China (Grant Nos. 61625501, 61427816, and 11904121), the Open Fund of the State Key Laboratory of High Field Laser Physics (SIOM), China, the Program for JLU Science and Technology Innovative Research Team (JLUSTIRT), China (Grant No. 2017TD-21), and Fundamental Research Funds for the Central Universities of China.</p></fn>

Air lasing: Phenomena and mechanisms**

Project supported by the National Natural Science Foundation of China (Grant Nos. 61625501, 61427816, and 11904121), the Open Fund of the State Key Laboratory of High Field Laser Physics (SIOM), China, the Program for JLU Science and Technology Innovative Research Team (JLUSTIRT), China (Grant No. 2017TD-21), and Fundamental Research Funds for the Central Universities of China.

Li Helong^{1, 2}, Yao Danwen², Wang Siqi², Fu Yao², Xu Huailiang^{2, 3, †}

Forward lasing spectrum produced by a coaxial 800 nm+400 nm laser pulse in air. Inset shows the measured (dot) and fitted (solid line) coherent characteristics of the narrowband signal at 391 nm.^[82]