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The complete characterization of the 19th harmonic of Ti:sapphire laser was demonstrated using the photoelectron spectral shearing interferometry for the first time. The frequency chirp of a harmonic pulse was sensitively detected by this method.
An optical parametric chirped pulse amplification system producing high-energy, few-cycle pulses at 2.0-mum wavelength with low superfluorescence noise background for high harmonic generation in gas jets is demonstrated.
We report an optical parametric chirped-pulse amplification (OPCPA) system with the pulse duration of 5.5 fs at a 1-kHz repetition rate, pumped by a 450-nm pulse from a frequency doubled Ti:sapphire laser.
640 GHz chirped beat waves are recorded on a real-time scope and 2.2 ps pulses are recorded on a single-shot streak camera with 1000:1 dynamic range after -30times time magnification.
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