CFD DPAL modeling for various schemes of flow configurations

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Abstract

Comprehensive analysis of kinetic and fluid dynamic processes in flowing-gas diode pumped alkali lasers (DPALs) using two- and three-dimensional computational fluid dynamics (2D and 3D CFD) models is reported for Cs DPALs. The models take into account effects of temperature rise and losses of alkali atoms due to ionization. Various gas flow regimes and transverse and parallel flow-optics directions configurations are studied. Optimization of the Cs DPAL parameters, using 3D CFD modeling, shows that applying high flow velocity and narrowband pumping, maximum lasing power as high as 40 kW can be obtained at pump power of 80 kW for transverse flow configuration in a pumped volume of ∼ 0.7 cm3. At high pump power the calculated laser power is higher for the transverse scheme than for the parallel scheme because of a more efficient heat convection from the beam volume in the transverse configuration. The CFD models are applied to experimental devices and the calculated results are in good agreement with the measurements.

Original languageEnglish
Title of host publicationTechnologies for Optical Countermeasures XI; and High-Power Lasers 2014
Subtitle of host publicationTechnology and Systems
EditorsRobert J. Grasso, Mark A. Richardson, David H. Titterton, Willy L. Bohn, Harro Ackermann
PublisherSPIE
ISBN (Electronic)9781628413144
DOIs
StatePublished - 1 Jan 2014
EventTechnologies for Optical Countermeasures XI; and High-Power Lasers 2014: Technology and Systems - Amsterdam, Netherlands
Duration: 22 Sep 201425 Sep 2014

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9251
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceTechnologies for Optical Countermeasures XI; and High-Power Lasers 2014: Technology and Systems
Country/TerritoryNetherlands
CityAmsterdam
Period22/09/1425/09/14

Keywords

  • Atomic gas lasers
  • Buoyancy
  • Compressible flow
  • Diode pumped lasers
  • Laser theory
  • Thermal effects

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