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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.
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...
A method capable of measuring single-laser-pulse dispersion is described. It relies on acquiring a single SHG spectrum for a fixed reference phase mask and allows studying transient phase changes in optical media.
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