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We demonstrate control of the sign and magnitude of self-steepening in quadratic media. Consequently, the self-steepening-like distortions due to group-velocity mismatch can be enhanced or cancelled, which allows new applications in the near-single-cycle regime.
Two-dimensional multicolored arrays of quadratic spatial solitons and up-converted parametric amplifications are observed through cascaded non-collinear quadratic processes in quadratic media, which can be switched by phase-insensitive weak beam control with second harmonic seeding pulses.
We report on an Ytterbium gain band, holey fiber based modulation instability laser. The all fiber integrated source produces a 40 GHz train of 4 ps pulses at a wavelength of 1064 nm.
Using non-linear coupled-mode equations and a Bloch-wave approach, we show that the nonlinear propagation of femtosecond pulses and supercontinuum light inside fiber grating can be modeled by nonlinear Schrodinger equation with modified dispersion profile.
Parabolic pulses from a similariton amplifier at 1550 nm are compressed using optimized linear compression in photonic bandgap fiber and soliton effect compression in dispersion-flattened highly nonlinear fiber. Transform-limited 20 fs pulses are obtained.
We study adiabatic soliton compression of femtosecond pulses in second harmonic generation by using chirped quasi-phase-matching gratings in the absence of group velocity mismatching. Two GV-matching schemes on collinear and non-collinear QPM are numerically investigated.
We report new nonlinear features observed in an adiabatically tapered photonic crystal fiber. When using femtosecond pulses, the soliton self-frequency shift and generation of nonsolitonic radiation result in a dasiashark-finpsila-shaped feature in the power-dependent spectrum.
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