Temporal characterization of mid-IR free-electron-laser pulses by frequency-resolved optical gating
- 15 May 1997
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 22 (10) , 721-723
- https://doi.org/10.1364/ol.22.000721
Abstract
We performed what we believe are the first practical full-temporal-characterization measurements of ultrashort pulses from a free-electron laser (FEL). Second-harmonic-generation frequency-resolved optical gating (FROG) was used to measure a train of mid-IR pulses distorted by a saturated water-vapor absorption line and showing free-induction decay. The measured direction of time was unambiguous because of prior knowledge regarding free-induction decay. These measurements require only 10% of the power of the laser beam and demonstrate that FROG can be implemented as a pulse diagnostic simultaneously with other experiments on a FEL.Keywords
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