Mid-infrared radiation generation in air by four-wave mixing of femtosecond laser pulses

Optical and Quantum Electronics 2026 Open access

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Authors: Virgilijus Vaičaitis, Mateusz Rębarz, Shirly Espinoza, Ona Balachninaitė
DOI: 10.1007/s11082-026-08794-4
Cited by: 1
References: 34

Abstract

Abstract Tunable mid-infrared radiation in the range of 2.06– $$12\,\mu $$ m was generated in air via loosely focused two-color femtosecond laser pulses. The emission spectra and beam profiles confirm its origin as four-wave difference-frequency mixing in a low-density air plasma filament. Near phase-matching due to low air dispersion opens possibilities for efficient energy conversion at high powers.

Fields of Study & Subjects

Laser-Matter Interactions and Applications Laser-Plasma Interactions and Diagnostics Laser Material Processing Techniques

Publication details

Journal / source
Optical and Quantum Electronics
Publisher
Springer Science and Business Media LLC
Volume
58
Issue
5
Publication date
15 April 2026
Language
EN