Three-dimensional analysis of harmonic generation in self-amplified spontaneous emission.

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In a high-gain free-electron laser, strong bunching at the fundamental wavelength can drive substantial harmonic bunching and sizable power levels at the harmonic frequencies. In this paper, we investigate the three-dimensional evolution of the harmonic fields based on the coupled Maxwell-Vlasov equations that take into account the nonlinear harmonic interaction. Each harmonic field is the sum of a self-amplified term and a term driven by the nonlinear harmonic interaction. In the exponential gain regime, the growth rate of the dominant nonlinear term is much faster than that of the self-amplified harmonic field. As a result, the gain length and the ... continued below

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12 p.

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Huang, Z. & Kim, K.-J. September 1, 1999.

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In a high-gain free-electron laser, strong bunching at the fundamental wavelength can drive substantial harmonic bunching and sizable power levels at the harmonic frequencies. In this paper, we investigate the three-dimensional evolution of the harmonic fields based on the coupled Maxwell-Vlasov equations that take into account the nonlinear harmonic interaction. Each harmonic field is the sum of a self-amplified term and a term driven by the nonlinear harmonic interaction. In the exponential gain regime, the growth rate of the dominant nonlinear term is much faster than that of the self-amplified harmonic field. As a result, the gain length and the transverse profile of the first few harmonics are completely determined by those of the fundamental. A percentage of the fundamental power level is found at the third harmonic frequency right before saturation for the current self-amplified spontaneous emission projects.

Physical Description

12 p.

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INIS; OSTI as DE00011814

Medium: P; Size: 12 pages

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  • 21st International Free Electron Laser Conference, Hamburg (DE), 08/23/1999--08/28/1999

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  • Report No.: ANL/ASD/CP-99050
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 11814
  • Archival Resource Key: ark:/67531/metadc624308

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Office of Scientific & Technical Information Technical Reports

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  • September 1, 1999

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • April 6, 2017, 8:11 p.m.

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Huang, Z. & Kim, K.-J. Three-dimensional analysis of harmonic generation in self-amplified spontaneous emission., article, September 1, 1999; Illinois. (digital.library.unt.edu/ark:/67531/metadc624308/: accessed December 12, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.