Reddy, KPJ and Reddy, NM (1985) Review of theoretical gainoptimization studies in $10.6 \mu m$ $CO_2N_2$ gasdynamic lasers. In: Pramana: Journal of Physics, 25 (1). pp. 101117.

PDF
Review_of_theoretical.pdf Download (1MB) 
Abstract
A review with 18 refs. A comprehensive theoretical analysis of optimization of gain in $CO_2N_2$ gasdynamic laser employing wedge or conical or hyperbolic nozzles with either $H_2O$ or He as the catalyst is presented. After a review of previous woprk, the usual governing equations for the steady inviscid quasi1dimensional flow in a supersonic nozzle of a gasdynamic laser are used to obtain similar solutions for the various flow quantities, which variables are subsequently used to optimize the smallsignal gain on the P(20) line of the $(001) \rightarrow (100)$ transition of $CO_2$ at wavelength $10.6 \mu m$. The corresponding optimum values like reservoir pressure and temperature and nozzle area ratio also have been predicted and presented in the form of graphs. The analysis predicts that employing of 2D wedge nozzle results in higher gain values and the $CO_2N_2H_2O$ gas dynamic laser employing 2Dwedge nozzle is operationally the best laser system for which the optimum value as high as $3.1 m^{1}$ gain can be obtained.
Item Type:  Journal Article 

Publication:  Pramana: Journal of Physics 
Publisher:  Indian Academy of Sciences 
Additional Information:  Copyright of this article belongs to Indian Academy of Sciences. 
Keywords:  CO2N2 gasdynamic laser;gainoptimization;similar solutions;universal equations;supersonic nozzles. 
Department/Centre:  Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering) 
Date Deposited:  17 Jul 2008 
Last Modified:  19 Sep 2010 04:46 
URI:  http://eprints.iisc.ac.in/id/eprint/14669 
Actions (login required)
View Item 