Modelling And Simulation Of Large Solid State Laser Systems

Abstract

The role of numerical methods to simulate the several physical processes (e.g., diffraction, self-focusing, gain saturation) that are involved in coherent beam propagation through large laser systems is discussed.A comprehensive simulation code for modeling the pertinent physical phenomena observed in laser operations (growth of small -scale modulation, spatial filter, imaging, gain saturation and beam -induced damage) is described in some detail. Comparisons between code results and solid state laser output performance data are presented.Design and performance estimation of the large Nova laser system at LLNL are given.Finally, a global design rule for large, solid state laser systems is discussed.

Design and testing of a large-aperture, high-gain, Brewster’s angle zigzag Nd:glass slab amplifier

“…The on-axis fluence of this beam is six times the average fluence calculated by the energy divided by the clear aperture. A further safety factor of 1.8 is assumed 13 to allow for modulation (due to diffraction from surface scratches, etc.) on the beam.…”