Abstract
The influence of the optimum parameters of mini-OPFIRL by the output couple of laser cavity was studied theoretically. The Density Matrix treatment is applied to a three-level system for steady state. The Density Matrix equations were solved under the assumption that Is ⩾ 1E–13 w/cm2 equal to the actual FIR power density at any points in the sample tube. Through numerical calculations, we found that the output coupling of OPFIRL affected seriously the energy exchange between pumping signal and FIR signal the stored energy of FIR signal and the optimum operating gas pressure. These problems are important to design a practical miniature OPFIRL.
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