Few-cycle pulse generation and nonlinear optical processes in hollow waveguides, photonic crystal fibers and microstructured materials (details)

• generation of few-cycle pulses by pulse compression employing the nonlinearity of noble gases and the Raman-polarizability of molecules in hollow fibers, their diagnostics, and their application in spectroscopy
• supercontinuum generation in gas-filled hollow fibers
• nonlinear processes in microstructure materials and microstructure fibers
• spatio-temporal shaping of localized wavepackets in the sub-10-fs range with advanced types of thin-film microoptics

High energy vacuum UV femtosecond pulses (100-180 nm) at 1-kHz repetition rate (details)

• efficient generation of ultrashort vacuum UV pulses by four wave mixing in hollow waveguides (theory and experiment)
• investigation of deep UV pumped parametric processes and continuum generation
• Raman compression of vacuum UV pulses

Novel nonlinear materials and interaction schemes for frequency conversion of ultrashort laser pulses (details)

• femtosecond pulse generation below 200 nm by nonlinear crystals with bandgaps up to 10 eV
• wide band semiconductors like some Li-containing ternary compounds with transparency extending from the UV up to the deep mid-IR
• mid-IR crystals for the 3-15 µm spectral range including such with engineerable material properties, like the so called solid solutions where the transparency, effective nonlinearity, phase- and group-matching can be tailored by composition