Propagation effects in the quantum description of collective recoil lasing

R. Bonifacio, N. Piovella, G.R.M. Robb, M.M. Cola

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The free electron laser and collective atomic recoil laser (CARL) are examples of collective recoil lasing, where exponential amplification of a radiation field occurs simultaneously with self-bunching of an ensemble of particles (electrons in the case of the FEL and atoms in the case of the CARL). In this paper, we discuss quantum and propagation effects using a model where the particle dynamics are described quantum-mechanically in terms of a matter-wave field, which evolves self-consistently with the radiation field. The model shows that the scattered radiation evolves superradiantly both in the case where the particle ensemble is short compared to the cooperation length of the system, and where the ensemble is long compared to the cooperation length. In both short and long pulse cases there exist a classical and quantum regime of superradiant emission. For short samples in both quantum and classical regimes the superradiant pulse has a low peak intensity and is said to exhibit `weak' superradiance. For long pulses in both quantum and classical regimes of evolution, the dynamics at the rear edge of the sample is dominated by propagation. This produces a,strong' superradiant pulse with much higher peak intensity than that predicted by `mean-field' or `steady-state' models in which propagation effects are neglected. (c) 2005 Elsevier B.V. All rights reserved.
LanguageEnglish
Pages381-396
Number of pages16
JournalOptics Communications
Volume252
Issue number4-6
DOIs
Publication statusPublished - 15 Aug 2005

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lasing
Free electron lasers
Radiation
propagation
pulses
Superradiance
radiation distribution
Lasers
Amplification
Laser pulses
bunching
free electron lasers
lasers
Atoms
Electrons
radiation
atoms
electrons

Keywords

  • free electron laser
  • collective atomic recoil laser
  • radiation field
  • scattered radiation

Cite this

Bonifacio, R. ; Piovella, N. ; Robb, G.R.M. ; Cola, M.M. / Propagation effects in the quantum description of collective recoil lasing. In: Optics Communications. 2005 ; Vol. 252, No. 4-6. pp. 381-396.
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Propagation effects in the quantum description of collective recoil lasing. / Bonifacio, R.; Piovella, N.; Robb, G.R.M.; Cola, M.M.

In: Optics Communications, Vol. 252, No. 4-6, 15.08.2005, p. 381-396.

Research output: Contribution to journalArticle

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AB - The free electron laser and collective atomic recoil laser (CARL) are examples of collective recoil lasing, where exponential amplification of a radiation field occurs simultaneously with self-bunching of an ensemble of particles (electrons in the case of the FEL and atoms in the case of the CARL). In this paper, we discuss quantum and propagation effects using a model where the particle dynamics are described quantum-mechanically in terms of a matter-wave field, which evolves self-consistently with the radiation field. The model shows that the scattered radiation evolves superradiantly both in the case where the particle ensemble is short compared to the cooperation length of the system, and where the ensemble is long compared to the cooperation length. In both short and long pulse cases there exist a classical and quantum regime of superradiant emission. For short samples in both quantum and classical regimes the superradiant pulse has a low peak intensity and is said to exhibit `weak' superradiance. For long pulses in both quantum and classical regimes of evolution, the dynamics at the rear edge of the sample is dominated by propagation. This produces a,strong' superradiant pulse with much higher peak intensity than that predicted by `mean-field' or `steady-state' models in which propagation effects are neglected. (c) 2005 Elsevier B.V. All rights reserved.

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