Temporal characterization of mid-IR free-electron-laser pulses by frequency-resolved optical gating

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-vapo...

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Bibliographic Details
Published in:Optics letters 1997-05, Vol.22 (10), p.721-723
Main Authors: Richman, B A, Krumbügel, M A, Trebino, R
Format: Article
Language:English
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Summary: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.
ISSN:0146-9592
1539-4794
DOI:10.1364/ol.22.000721