Quantum/classical mode evolution in free electron laser oscillators
Abstract
The problem of oscillator evolution and mode competition in free electron lasers is studied. Relativistic quantum field theory is used to calculate electron wave functions, the angular distribution of spontaneous emission, and the transition rates for stimulated emission and absorption in each mode. The photon rate equation for the weakfield regime is presented. This rate equation is applied to oscillator evolution with a conventional undulator, a twostage optical klystron, and a tapered undulator. The effects of noise are briefly discussed.
 Publication:

IEEE Journal of Quantum Electronics
 Pub Date:
 March 1983
 DOI:
 10.1109/JQE.1983.1071871
 Bibcode:
 1983IJQE...19..272B
 Keywords:

 Free Electron Lasers;
 Laser Modes;
 Laser Outputs;
 Quantum Mechanics;
 Relativistic Electron Beams;
 Wave Functions;
 Angular Distribution;
 Klystrons;
 Radiation Distribution;
 Relativistic Theory;
 Spontaneous Emission;
 Stimulated Emission;
 Lasers and Masers