, 21:131

Analytical studies of gain optimization in CO2-N2 gasdynamic lasers employing two-dimensional wedge nozzles

  • V Shanmugasundaram
  • N M Reddy
Experimental Techniques and Instrumentation

DOI: 10.1007/BF02894737

Cite this article as:
Shanmugasundaram, V. & Reddy, N.M. Pramana - J Phys (1983) 21: 131. doi:10.1007/BF02894737


An analytical method has been proposed to optimise the small-signaloptical gain of CO2-N2 gasdynamic lasers (gdl) employing two-dimensional (2D) wedge nozzles. Following our earlier work the equations governing the steady, inviscid, quasi-one-dimensional flow in the wedge nozzle of thegdl are reduced to a universal form so that their solutions depend on a single unifying parameter. These equations are solved numerically to obtain similar solutions for the various flow quantities, which variables are subsequently used to optimize the small-signal-gain. The corresponding optimum values like reservoir pressure and temperature and 2D nozzle area ratio also have been predicted and graphed for a wide range of laser gas compositions, with either H2O or He as the catalyst. A large number of graphs are presented which may be used to obtain the optimum values of small signal gain for a wide range of laser compositions without further computations.


Gasdynamic laserpopulation inversionsmall signal gainarea ratiowedge nozzle

Copyright information

© Indian Academy of Sciences 1983

Authors and Affiliations

  • V Shanmugasundaram
    • 1
  • N M Reddy
    • 1
  1. 1.Department of Aerospace EngineeringIndian Institute of ScienceBangaloreIndia
  2. 2.University of EdinburghEngland