Propagation of a QuasiGaussian Pulse in a Partially Homogeneously Broadened Gas Laser Amplifier: Effects of a QuasiGaussian Pulse on LineShape Parameter Analysis
Abstract
The effect of a quasigaussian pulse on the lineshape parameter analysis is treated in terms of the skewness γ_{1} and excess γ_{2}, measures of offgaussian shape, by using the resonant pulse propagation method in a linear laser amplifier. Using the derived formulas of the incremental intensity gain γ_{Iq}, the increments of pulse duration squared \partialτ_{q}'^{2}/\partial z and of pulse delay time \partial T_{q}'/\partial z, per unit plasma length for a quasigaussian pulse, and the experimentally measured values of these, the gain parameter G, the Lorentzian linewidth ∆ν_{L} and the Doppler linewidth ∆ν_{D} of the laser amplifier are conveniently corrected by subtracting the effects of a quasigaussian pulse with the obtained γ_{1} and γ_{2}. This is also applied to a xenon 3.5 μm laser transition, discussing the influence of γ_{1} and γ_{2} on the accuracy of lineshape parameters.
 Publication:

Japanese Journal of Applied Physics
 Pub Date:
 May 1978
 DOI:
 10.1143/JJAP.17.871
 Bibcode:
 1978JaJAP..17..871S
 Keywords:

 Gas Lasers;
 Laser Modes;
 Light Amplifiers;
 Pulsed Lasers;
 Spectral Line Width;
 Power Gain;
 Propagation Modes;
 Skewness;
 Time Lag;
 Xenon;
 Lasers and Masers