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physics.optics2018
Lasing without population inversion in air
André Mysyrowicz, Rostyslav Danylo, Pengji Ding +8
A cavity-free laser in the sky could lead to revolutionary improvements in optical remote sensing for atmospheric science. Abundant in air, nitrogen molecules are prime candidates…
physics.optics2018
Backward lasing of singly ionized nitrogen ions pumped by femtosecond laser pulses
Xiang Zhang, Rostyslav Danylo, Zhengquan Fan +6
We report on the observation of backward lasing at 391.4 nm of nitrogen ions pumped by linearly polarized intense femtosecond pulses at 800 nm. The strongly enhanced spectral inten…