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Title: Pulse duration and wavelength stability measurements of a midinfrared free-electron laser
Authors: Qin, Yu
Zen, Heishun  kyouindb  KAKEN_id  orcid (unconfirmed)
Wang, Xiaolong
Kii, Toshiteru  kyouindb  KAKEN_id
Nakajima, Takashi
Ohgaki, Hideaki  kyouindb  KAKEN_id  orcid (unconfirmed)
Author's alias: 中嶋, 隆
Issue Date: Apr-2013
Publisher: Optical Society of America
Journal title: Optics Letters
Volume: 38
Issue: 7
Start page: 1068
End page: 1070
Abstract: We report the pulse duration and wavelength stability measurements of a midinfrared free-electron laser (FEL) where the wavelength fluctuation may not be negligible. The technique we employ is a fringe-resolved autocorrelation (FRAC) method that has good sensitivity on not only the pulse duration and the chirp but also the wavelength stability. By the simple manipulation of experimental FRAC signals, we can obtain the pulse duration even if the amounts of the chirp and the wavelength stability are not known in advance, which is further used to estimate the wavelength stability. Through this procedure we find that the pulse duration of the Kyoto University FEL at 12 μm is about 0.58 ps without any notable chirp, and the wavelength stability is about 1.3%. We also carry out separate experiments for intensity autocorrelation and sum-frequency mixing. The difference we find for pulse duration and wavelength stability by the different measurements is attributed to the different operation conditions of FEL.
Rights: © 2013 Optical Society of America.
This paper was published in "Optics Letters" and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
DOI(Published Version): 10.1364/OL.38.001068
Appears in Collections:Journal Articles

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