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Self phase modulation in hollow waveguide filled with noble gases have been successfully used to produce ultra-broad bandwidths. The intense spectral phase distortions produced by self phase modulation have previously been compensated by prism pairs and adaptive pulse shaping. Here we demonstrate the generation of 4.8 fs, 200 muJ intense laser pulses by multiphoton intrapulse interference phase scan...
Spatial self-action of 100-MW 30-fs laser pulses in hollow-core photonic-crystal fibers filled with different gases is demonstrated, resulting in the formation of circularly symmetric Townes-like beam profiles and allowing channeling of high-intensity ultrashort laser pulses
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