Harmonic-seeded remote laser emissions in N2-Ar, N2-Xe and N2-Ne mixtures: a comparative study

Abstract

We report on the investigation on harmonic-seeded remote laser emissions at 391 nm wavelength from strong-field ionized nitrogen molecules in three different gas mixtures, i.e., N2-Ar, N2-Xe and N2-Ne. We observed a decrease in the remote laser intensity in the N2-Xe mixture because of the decreased clamped intensity in the filament; whereas in the N2-Ne mixture, the remote laser intensity slightly increases because of the increased clamped intensity within the filament. Remarkably, although the clamped intensity in the filament remains nearly unchanged in the N2-Ar mixture because of the similar ionization potentials of N2 and Ar, a significant enhancement of the lasing emission is realized in the N2-Ar mixture. The enhancement is attributed to the stronger third harmonic seed, and longer gain medium due to the extended filament.

10 pages, 5 figures

References in corpus (4)

• High gain backward lasing in air
• High-brightness switchable multi-wavelength remote laser in air
• Third and fifth harmonics generation by tightly focused femtosecond pulses at 2.2 μm wavelength in air
• Comparative investigation of third and fifth harmonic generation in atomic and molecular gases driven by mid-infrared ultrafast laser pulses

Cited by in corpus (5)

• Self-seeded lasing in ionized air pumped by 800 nm femtosecond laser pulses
• Remote creation of strong and coherent emissions in air with two-color ultrafast laser pulses
• Signature of superradiance from a nitrogen gas plasma channel produced by strong field ionization
• Self-induced white-light seeding laser in a femtosecond laser filament
• Second harmonic generation in a centrosymmetric gas medium with spatiotemporally focused intense femtosecond laser pulses