Abstract
We present what we believe to be the first complete intensity and phase measurements of ultrashort laser pulses from an FEL. We use the technique of frequency-resolved optical gating, or FROG, to measure the full time-dependent intensity and phase of the pulse. This is to our knowledge, the first reported application of FROG in the mid-infrared. These measurements were carried out at wavelengths near 5 μm.
© 1995 Optical Society of America
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