195 citations · 354 across the 11 of their papers we have counts for
11 papers · 1 filter
Control of Air Lasing
Mathew Britton, Marianna Lytova, Dong Hyuk Ko +6
A near-infrared laser generates gain on transitions between the and states of the nitrog…
Femtosecond streaking in ambient air
A. Korobenko, K. Johnston, M. Kubullek +10
We demonstrate a novel method to measure the temporal evolution of electric fields with optical frequencies. Our technique is based on the detection of transient currents in air pl…
Measurement of delayed fluorescence in N2+ with streak camera
Ali Rastegari, Jean-Claude Diels, Lee R. Liu +1
Using a streak camera, we directly measure time- and space-resolved dynamics of N2+ emission from a self-seeded filament. We observe characteristic signatures of superfluorescence…
Low power (mW) nonlinearities of polarization maintaining fibers
Hanieh Afkhamiardakani, Luke Horstman, Ladan Arissian +1
Polarization maintaining (PM) fibers are meant to maintain linear polarization along a preferred axis. A PM fiber can be seen as the fiber version of a very high order waveplate, d…
Transient gain from in light filaments
Ladan Arissian, Brian Kamer, Ali Rastegari +1
We perform high resolution spectroscopy of emission in light filaments using a controlled pump at 795 followed by a second harmonic weak probe. Our result suggests that tra…
HV discharge acceleration by sequences of UV laser filaments with visible and near-infrared pulses
Elise Schubert, Ali Rastegari, Chengyong Feng +6
We investigate the triggering and guiding of DC high-voltage discharges over a distance of 37 cm by filaments produced by ultraviolet (266 nm) laser pulses of 200 ps duration. The…