Near two-photon resonance short pulse compression in atomic noble gases

Compression of ultrashort UV pulses in a self-defocusing gas

“…4(a)]. We can notice that the usual broad low-intensity supercontinuum ( ω SC /ω 0 > 1) routinely observed from the propagation of plasma-induced filaments (3) in the degenerated case (see [14]). and caused by the mechanism of intensity clamping is missing.…”

“…In Ref. [14], numerical evidence was given to the principle of pulse compression in (1 + 1)-dimensional hollow fibers filled with Xe where pulses at 243 nm can be drastically shortened with minimum energy losses. In higher-dimensional systems, nonlinear defocusing can offer a rich variety of dynamical patterns (e.g., ring dark solitons and vortices [15]).…”

“…with k (2) = 13.12 fs 2 /cm [19] and n 2 = −1.56 × 10 −17 cm 2 /W [14]. Both propagation models are integrated numerically for Gaussian pulses with input power P in , beam waist w 0 , and 1/e 2 pulse half-width τ p .…”

“…In [13], KrF laser light was used to measure the Kerr index n 2 of xenon, which can attain important negative values close to a two-photon resonance at 249.6 nm. In [14], numerical evidence was given to the principle of pulse compression in (1+1) dimensional hollow fibers filled with xenon, where pulses at 243 nm could be drastically shortened with minimum energy losses. In higher dimensional systems, nonlinear defocusing can offer a rich variety of dynamical patterns, e.g., ring dark solitons and vortices [15].…”

“…Here, z is the propagation variable and t a retarded time. Linear dispersion for xenon is included via k(ω) [19], while the expression for the nonlinear susceptibility χ (3) is that given in [14] [see also Fig. 4(b)].…”