Generation of intense 8-fs pulses at 400??nm

Abstract

Frequency-doubled pulses from a sub-40-fs, 1-kHz Ti:sapphire amplifier system are spectrally broadened in an argon-filled hollow waveguide. Compression of the self-phase-modulated pulses is implemented with chirped mirrors and a prism pair, yielding 8-fs, 15-muJ pulses in the violet spectral range.

Ellipticity dependence of 400 nm-driven high harmonic generation

“…Sub-10 fs 400 nm pulses have been generated by pulse compression through self-phase modulation in gas-filled hollow core fiber. [18][19][20] In conclusion, our measurements show that the HHG yield from a 400 nm driving laser drops more slowly with increasing ellipticity than that of 800 nm driving lasers. We expect that the generalized double optical gating is appropriate to take advantage of the increased conversion efficiency at short driving laser wavelengths in generating high energy isolated attosecond pulses.…”

FROG in the Single-Cycle Regime

“…This precise problem has recently been confronted experimentally in attempts to characterize tunable pulses around this wavelength generated in gas-filled hollow fibers [87,88]. The severity ofthe spectral filtering in this wavelength region is aggravated by the steeply rising bulk dispersion in both crystals and glasses because of the proximity of the resonance absorption lying in the Uv.…”

Sub-10-fs deep-ultraviolet light source with stable power and spectrum

“…Broadband sub-10-fs pulses can be generated in several wavelength ranges including the nearultraviolet (NUV) [1][2][3], visible [4][5][6][7], and nearinfrared (NIR) [8,9] ranges. Some of these pulses have been applied to ultrafast spectroscopy [10][11][12][13].…”