Semiclassical, multilevel pulsed laser amplifier: Computer simulation for molecular nitrogen
Abstract
Pulse propagation in a multilevel laser amplifier is investigated using a semiclassical theory. The evolution of the active medium is described by coupled equations of motion for the density matrix representing quantum mechanical probability amplitudes. The one dimensional electromagnetic field is treated classically by Maxwell's equations. The dipole approximation is assumed to hold for the interaction of atoms with the field. The wave equation for the electromagnetic field is driven by the macroscopic polarization which is a summation over dipole moments. Homogeneous broadening is assumed. Phenomenological decay constants are used. A two level pulse propagation approach is extended to a general multilevel system under certain assumptions. Several hypothetical cases were considered for both two and three level systems.
 Publication:

Ph.D. Thesis
 Pub Date:
 1978
 Bibcode:
 1978PhDT........90L
 Keywords:

 Amplifiers;
 Computerized Simulation;
 Laser Plasma Interactions;
 Nitrogen;
 Pulsed Lasers;
 Electromagnetic Fields;
 Equations Of Motion;
 Molecular Interactions;
 Quantum Mechanics;
 Wave Propagation;
 Lasers and Masers