Related Experiment Video
Updated: Aug 12, 2026

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
Published on: December 18, 2015
Characterization of the third-harmonic radiation generated by intense laser self-formed filaments propagating in air
I Alexeev1, A C Ting, D F Gordon
1Plasma Physics Division, Naval Research Laboratory, Washington, DC 20375, USA. ilya.alexeev@gmail.com
Abstract:
We perform laboratory experiments to study ultraviolet radiation generated by intense self-formed laser filaments produced by propagating high-power femtosecond laser pulses in air. The laser used in the experiment is a 0.5 TW Ti:sapphire system with the center wavelength at 800 nm. The observed ultraviolet emission occurs in the form of the third harmonic and frequency-upshifted radiation from the fundamental. We present direct characterization of the generated harmonic and frequency-upshifted radiation, including transverse imaging and spatially resolved spectral measurements.
Related Concept Videos
Emission Spectra
Standing Waves in a Cavity

