Mode locking in a free-electron laser amplifier

N R Thompson, B W J McNeil

Research output: Contribution to journalArticle

104 Citations (Scopus)
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Abstract

A technique is proposed to generate attosecond pulse trains of radiation from a free-electron laser amplifier. The optics-free technique synthesizes a comb of longitudinal modes by applying a series of spatiotemporal shifts between the copropagating radiation and electron bunch in the free-electron laser. The modes may be phase locked by modulating the electron beam energy at the mode spacing frequency. Three-dimensional simulations demonstrate the generation of a train of 400 as pulses at gigawatt power levels evenly spaced by 2.5 fs at a wavelength of 124 A. In the x-ray at wavelength 1.5 A, trains of 23 as pulses evenly spaced by 150 as and of peak power up to 6 GW are predicted.
Original languageEnglish
Article number203901
Number of pages4
JournalPhysical Review Letters
Volume100
Issue number20
DOIs
Publication statusPublished - 21 May 2008

Fingerprint

free electron lasers
locking
amplifiers
pulses
radiation
wavelengths
spacing
optics
electron beams
shift
electrons
x rays
simulation
energy

Keywords

  • optical klystron
  • pulses
  • fel
  • free-electron laser
  • mode locking

Cite this

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abstract = "A technique is proposed to generate attosecond pulse trains of radiation from a free-electron laser amplifier. The optics-free technique synthesizes a comb of longitudinal modes by applying a series of spatiotemporal shifts between the copropagating radiation and electron bunch in the free-electron laser. The modes may be phase locked by modulating the electron beam energy at the mode spacing frequency. Three-dimensional simulations demonstrate the generation of a train of 400 as pulses at gigawatt power levels evenly spaced by 2.5 fs at a wavelength of 124 A. In the x-ray at wavelength 1.5 A, trains of 23 as pulses evenly spaced by 150 as and of peak power up to 6 GW are predicted.",
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Mode locking in a free-electron laser amplifier. / Thompson, N R; McNeil, B W J.

In: Physical Review Letters, Vol. 100, No. 20, 203901, 21.05.2008.

Research output: Contribution to journalArticle

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T1 - Mode locking in a free-electron laser amplifier

AU - Thompson, N R

AU - McNeil, B W J

PY - 2008/5/21

Y1 - 2008/5/21

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AB - A technique is proposed to generate attosecond pulse trains of radiation from a free-electron laser amplifier. The optics-free technique synthesizes a comb of longitudinal modes by applying a series of spatiotemporal shifts between the copropagating radiation and electron bunch in the free-electron laser. The modes may be phase locked by modulating the electron beam energy at the mode spacing frequency. Three-dimensional simulations demonstrate the generation of a train of 400 as pulses at gigawatt power levels evenly spaced by 2.5 fs at a wavelength of 124 A. In the x-ray at wavelength 1.5 A, trains of 23 as pulses evenly spaced by 150 as and of peak power up to 6 GW are predicted.

KW - optical klystron

KW - pulses

KW - fel

KW - free-electron laser

KW - mode locking

UR - http://journals.aps.org/prl/

U2 - 10.1103/PhysRevLett.100.203901

DO - 10.1103/PhysRevLett.100.203901

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