Quantum statistical properties of an FEL amplifier
Abstract
Consideration is given to the problem of photon quantum statistics of a single particle freeelectron laser (FEL) amplifier in the smallsignal cold beam regime to first order in the electron quantum recoil. The initial radiation wave is an arbitrary coherent state. It is shown that Glauber coherence is not preserved by the FEL interaction if the initial coherent state is not the vacuum, even if the electron quantum recoil (absence of gain) is neglected. The first two moments of the final photon distribution are evaluated and sub (super)Poissonian photon statistics are found for a negative (positive) resonance parameter.
 Publication:

IEEE Journal of Quantum Electronics
 Pub Date:
 July 1985
 DOI:
 10.1109/JQE.1985.1072747
 Bibcode:
 1985IJQE...21.1069D
 Keywords:

 Free Electron Lasers;
 Quantum Statistics;
 Coherent Radiation;
 Glauber Theory;
 Photon Density;
 Poisson Density Functions;
 Lasers and Masers