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Fiber lasers operating in the normal dispersion regime with a filter are analyzed with simulations of coupled-field equations. This model predicts new operating modes previously unrecognized by scalar simulations.
We derive conditions for full spatio-temporal factorability in non-collinear type-I spontaneous parametric downconversion. We show that fulfilment of these conditions leads to a higher single-mode fiber-coupled brightness, compared to sources rendered factorable through spectral filtering.
We present time-resolved nonlinear optical measurements on polaritonic states in metallic photonic crystals. The femtosecond time dynamics of the polariton are tailored by an interferometric three-pulse pump-probe technique.
Using a microscopic theory, we predict all-optical switching in planar semiconductor micro-cavities where a weak beam switches a stronger signal. The scheme is similar to that recently demonstrated in atomic vapors [Dawes et al., Science 308, 672 (2005)].
Fiber lasers modelocked by filtering of a chirped pulse are analyzed with the Ginzburg-Landau equation. A range of experimental pulse shapes are predicted remarkably well by an exact analytical solution, and constitute dissipative temporal solitons.
Production of squeezed vacuum laser pulses at 800 nm is studied with a Sagnac fiber interferometer using a Ti:sapphire femtosecond laser. Excessive noise can be suppressed with shorter fiber lengths even with sub-picosecond laser pulses.
We develop a heterodyne interferometry using high harmonic generation in mixed gases. The structure of CO2 was encoded in the interference modulation of harmonics generated in mixed gases of aligned CO2 and its reference atom.
We demonstrate generation of intense 5 fs pulses using a pressure gradient hollow fiber. The beam after pulse compression could be focused to a diffraction-limited spot with an intensity of 3×1018 W/cm2.
We present a direct measurement method of the spectral phase of ultrafast laser pulses. The second-derivative of the unknown spectral phase can be directly envisioned and extracted from the experimental 2D-contour plot without mathematical manipulation.
We observe rotational wave packet dynamics in CO2 through third harmonic generation (THG). The conversion efficiency of THG is modulated by the wavepacket through ultrafast perturbations to linear and third-order optical susceptibilities.
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