Open AccessSpectral modulation of higher harmonic spontaneous emission from an optical klystron
Author(s) -
Sei Norihiro,
Ogawa Hiroshi,
Yamada Kawakatsu,
Koike Masaki,
Ohgaki Hideaki
Publication year - 2014
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s160057751400678x
Subject(s) - klystron , harmonics , optics , harmonic spectrum , physics , wavelength , harmonic , modulation (music) , high harmonic generation , laser , emission spectrum , spontaneous emission , spectral line , voltage , acoustics , beam (structure) , quantum mechanics , astronomy
Higher harmonics of spontaneous emission from an optical klystron have been observed. The modulation factor of the spontaneous emission spectrum for the higher harmonics can be described by considering the observation system. When the dispersive gap of the optical klystron was fixed, the microstructure interval of the spontaneous emission spectrum at a certain resonant wavelength became narrower as the order of the higher harmonic became larger. Some unique characteristics of the higher harmonics have been clarified, and these studies are likely to contribute to the development of free‐electron lasers using higher harmonics of an optical klystron in the shorter‐wavelengths region.