Answers are grounded in this paper and cite their sources.
Backscattered fluorescence from nitrogen molecules from filaments induced by intense, ultrafast Ti:sapphire laser pulses increases exponentially with an increase in the length of the filament. This shows that the fluorescence undergoes amplified spontaneous emission along the filament direction, a finding that could have applications in lightning discharge control and remote sensing.
No takes yet. Share an insight, caveat, or question.
Luo et al. (2004) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: