The distant projection of high-peak and average-power laser beams in the atmosphere is a
long-standing goal with a wide range of applications. Our early proof-of-principle …

We demonstrate that femtosecond filaments can set up an extended and robust thermal
waveguide structure in air with a lifetime of several milliseconds, making possible the very …

We measure the nonlinear refractive index coefficients in N_2, O_2, and Ar from visible
through mid-infrared wavelengths (λ= 0.4–2.4 μm). The wavelengths investigated …

We study the filamentation in air of multi-millijoule optical vortices and compare them with
the classical filamentation regime. The femtosecond vortex beam generates multiple plasma …

Using femtosecond laser pulses at 800 and 400 nm, we characterize the formation of
underdense channels in air generated by laser filamentation at the millijoule energy level by …

We demonstrate that an ultrashort high intensity laser pulse can propagate for hundreds of
Rayleigh ranges in a prepared neutral hydrogen channel by generating its own plasma …

We report a quasi-continuously operating air waveguide, generated by high-repetition-rate
patterned filamentation of femtosecond laser pulses. For repetition rates higher than the air …

Laser filamentation is responsible for the deposition of a significant part of the laser pulse
energy in the propagation medium. We found that using terawatt laser pulses and …

Filamentation has extensively been explored and is well understood at repetition rates< 1
kHz due to the typical availability of multi-mJ laser systems at a moderate average power …

We discover long-lived (microsecond-scale) optical waveguiding in the wake of atmospheric
laser filaments. We also observe the formation and then outward propagation of the …