Self-seeded lasing in ionized air pumped by 800 nm femtosecond laser pulses

Abstract

We report on the lasing in air and pure nitrogen gas pumped by a single 800 nm femtosecond laser pulse. Depending on gas pressure, incident laser power and beam convergence, different lasing lines are observed in the forward direction with rapid change of their relative intensities. The lines are attributed to transitions between vibrational and rotational levels of the first negative band of the singly charged nitrogen molecule-ion. We show that self-seeding plays an important role in the observed intensity changes.

9 pages, 4 figures

Cited by in corpus (22)

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• Measurement of the nonlinear refractive index of air constituents at mid-infrared wavelengths
• 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
• Gain dynamics of a free-space nitrogen laser pumped by circularly polarized femtosecond laser pulses
• Self-induced white-light seeding laser in a femtosecond laser filament
• Impulsive rotational Raman scattering of N2 by a remote "air laser" in femtosecond laser filament
• Near-resonant Raman amplification in the rotational quantum wavepackets of nitrogen molecular ions generated by strong field ionization
• Amplification of intense light fields by nearly free electrons
• Coherent control of superradiance from nitrogen ions pumped with femtosecond pulses
• Electronic State Population Dynamics upon Ultrafast Strong Field Ionization and Fragmentation of Molecular Nitrogen
• Coherence from multiorbital tunneling ionization of molecules
• Quantum erasing of laser emission in N${}_2^{+}$
• Laser beam self-symmetrization in air in the multifilamentation regime
• N${}_2^{+}$ Lasing: Gain and Absorption in the Presence of Rotational Coherence
• Amplification of light pulses with orbital angular momentum (OAM) in nitrogen ions lasing
• Controlling the polarization of nitrogen ion lasing
• Revisiting self-seeding mechanism by generating vector ultraviolet N${}_2^{+}$ lasing
• Nonadiabatic theory for subcycle ionic dynamics in multielectron tunneling ionization