Abstract

Coherent optical vortices are generated from ultrashort 6.4fs pulses. Our results demonstrate angular dispersion compensation of ultrashort 6.4fs Laguerre–Gaussian (LG) pulses as well as what is believed to be the first direct autocorrelation measurement of 80fs LG amplified pulses. A reflective-mirror-based 4f-compressor is proposed to compensate the angular and group velocity dispersion of the ultrashort LG pulses.

© 2007 Optical Society of America

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