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We revisit the femtosecond transition-state spectroscopy of sodium iodide taking advantage of modern lasers and pulse-shaping to better map the low-lying electronic states, some forming predissociative wells through curve crossings. We also carry out high-level ab initio multi-reference configuration interaction calculations including spin-orbit coupling terms and using large correlation-consistent...
Shaper-based characterization and compression of the multi-soliton output of a large-mode area photonic-crystal fiber pumped at 1550 nm is presented. Spectral phase correction of each soliton in the output results in sub-30 fs pulses.
We compare deviations from theory in the yield of second harmonic generation in order to characterize high-repetition rate femtosecond laser sources where the amplitude and phase differs from pulse to pulse. Experimental results are presented for cases with phase noise and a post-pulse.
We present pump-probe measurements that reveal significant changes in the group delay dispersion of a femtosecond laser pulse being controlled by the relative delay between two pulses. We suggest applications for this time-domain shaping approach.
The optical Kerr effect (OKE) produces an intensity dependent refractive index change which gives rise to self-phase modulation (SPM). SPM leads to changes in laser pulse duration by affecting the phase of the laser pulse. Here we explore the transient behavior of fused silica and find that the OKE-induced phase changes are accompanied by significant changes in the magnitude and sign of the group...
We demonstrate the measurement of transient dispersion in fused silica by RT-MIIPS. The results are validated via Fourier Transform Spectral Interferometry. The observed dispersion modulation is explained within a theoretical model.
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