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Physical Review A

Photon statistics and squeezing properties of a free-electron laser

Suranjana Rai, S. Chopra

Published Oct 1, 1984• 8 citations
Publisher

Abstract

It is shown that the field emitted by a free-electron laser (FEL) in the low-gain regime exhibits antibunching over a wide range, for an initial Poisson distribution of probability amplitudes. We also investigate the variance of the momentum coordinate, and find the FEL state to be squeezed.
DOI
10.1103/physreva.30.2104

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We discuss the problem of photon quantum statistics of a single particle Free Electron Laser (FEL) amplifier in the small-signal cold beam regime to first order in the electron quantum recoil. The initial radiation wave is an arbitrary coherent state. We show that Glauber coherence is not preserved by the FEL interaction if the initial coherent state is not the vacuum even if we neglect the electron quantum recoil (absence of gain). We evaluate the first two moments of the final photon distribution and find sub (super)-poissonian photo statistics for negative (positive) resonance parameter.