Beam propagation in an inhomogeneous medium of a static gas cesium diode pumped alkali laser: three-dimensional wave optics and fluid dynamics simulation Academic Article uri icon

abstract

  • Abstract Analysis of beam propagation and kinetic and fluid dynamic processes in static Cs diode pumped alkali lasers (DPALs), using the wave optics model and gasdynamic code, is reported. The analysis is based on a three-dimensional, time-dependent computational fluid dynamics (3D CFD) model. The gas flow conservation equations in the DPAL cell are coupled to a fast-Fourier-transform algorithm for the laser beam transverse modes' propagation to obtain a solution of the scalar paraxial wave equation where the gain and refractive index in the DPAL medium affect the wave amplitude and phase. Using the CFD and beam propagation models, the gas flow pattern and spatial distributions of the pump and laser intensities and the laser beam phase in a plano-concave resonator were calculated for end-pumped Cs DPAL. The DPAL medium temperature and refractive …

publication date

  • March 1, 2018

published in