Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Computational fluid dynamics modeling of subsonic flowing-gas diode-pumped alkali lasers: comparison with semi-analytical model calculations and with experimental results

Not Accessible

Your library or personal account may give you access

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. The 2D model is applied to a Cs DPAL with optical resonator-flow field coaxial configuration and the 3D model is applied to an optical axis transverse to the flow configuration. The models take into account effects of temperature rise and losses of Cs atoms due to ionization. The 2D CFD model is applied to 1 kW flowing-gas Cs DPAL [Quantum Electron. 42, 95 (2012) [CrossRef]  ] and the calculated results are in good agreement with the measurements. Comparison of the 2D CFD to semi-analytical model [J. Opt. Soc. Am. B 30, 1118 (2013) [CrossRef]  ] shows that for low pump power both models predict very close values of the laser power; however, at higher pump power, corresponding to saturation of the absorption of the pump transition, the laser power calculated using the 2D CFD model is much higher than that obtained using the semi-analytical model. At high pump power, the heat convection out of the laser resonator is more efficient for the transverse case than the coaxial case, the temperature in the resonator is lower, and consequently the calculated laser power is higher. 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 0.7cm3.

© 2014 Optical Society of America

Full Article  |  PDF Article
More Like This
Modeling of supersonic diode pumped alkali lasers

Eyal Yacoby, Karol Waichman, Oren Sadot, Boris D. Barmashenko, and Salman Rosenwaks
J. Opt. Soc. Am. B 32(9) 1824-1833 (2015)

Detailed analysis of kinetic and fluid dynamic processes in diode-pumped alkali lasers

Boris D. Barmashenko and Salman Rosenwaks
J. Opt. Soc. Am. B 30(5) 1118-1126 (2013)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (9)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (3)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (30)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved