Self-induced white-light seeding laser in a femtosecond laser filament

Abstract

We report, for what we believe to be the first time, on the generation of remote self-seeding laser amplification by using only one 800 nm Ti:Sapphire femtosecond laser pulse. The laser pulse (~ 40 fs) is first used to generate a filament either in pure nitrogen or in ambient air in which population inversion between ground and excited states of nitrogen molecular ions is realized. Self-induced white light inside the filament is then serving as the seed to be amplified. The self-induced narrow-band laser at 428 nm has a pulse duration of ~2.6 ps with perfect linear polarization property. This finding opens new possibilities for remote detection in the atmosphere.

arXiv comment18 pages, 5 figures

References in corpus (3)

• High-brightness switchable multi-wavelength remote laser in air
• Self-seeded lasing in ionized air pumped by 800 nm femtosecond laser pulses
• Harmonic-seeded remote laser emissions in N2-Ar, N2-Xe and N2-Ne mixtures: a comparative study

Cited by in corpus (8)

• Backward stimulated radiation from filaments in Nitrogen gas and air pumped by circularly polarized 800 nm femtosecond laser pulses
• Superfilamentation in air
• Signature of superradiance from a nitrogen gas plasma channel produced by strong field ionization
• Rotational Quantum Beat Lasing Without Inversion
• Lasing of ambient air with microjoule pulse energy pumped by a multi terawatt IR femtosecond laser
• Impulsive rotational Raman scattering of N2 by a remote "air laser" in femtosecond laser filament
• Electronic State Population Dynamics upon Ultrafast Strong Field Ionization and Fragmentation of Molecular Nitrogen
• Revisiting self-seeding mechanism by generating vector ultraviolet N${}_2^{+}$ lasing