By use of a transmission-grating-based Michelson interferometer, second-order interferometric as well as intensity autocorrelation traces of the third harmonic of a Ti:sapphire 50-fs laser beam produced in Ar have been measured. The duration of the harmonic is found to be that expected from lowest-order perturbation theory. At this wavelength, the performance of the interferometer with respect to pulse-front distortion and dispersion is found to be satisfactory. This result is a first step toward the use of the interferometer for the temporal characterization of higher harmonics or harmonic superposition forming attosecond pulse trains.
© 2002 Optical Society of America
(190.0190) Nonlinear optics : Nonlinear optics
(190.4160) Nonlinear optics : Multiharmonic generation
(320.0320) Ultrafast optics : Ultrafast optics
(320.7080) Ultrafast optics : Ultrafast devices
N. A. Papadogiannis, G. Nersisyan, E. Goulielmakis, T. P. Rakitzis, E. Hertz, D. Charalambidis, G. D. Tsakiris, and K. Witte, "Temporal characterization of short-pulse third-harmonic generation in an atomic gas by a transmission-grating Michelson interferometer," Opt. Lett. 27, 1561-1563 (2002)