Title :
Role of power broadening in influencing maximum gain of far infrared gain material
Author :
Bakos, Joseph S. ; Ignacz, Peter N. ; Sörlei, Zsuzsa
Author_Institution :
Dept. of Plasma Phys., KFKI Res. Inst. for Nucl. & Particle Phys., Budapest, Hungary
fDate :
7/1/1993 12:00:00 AM
Abstract :
The gain of methanol vapor is investigated at various pumping power densities. The behavior of the gain can be described by the four-level rate equation model if the power broadening of the transitions is taken into account phenomenologically. This phenomenologically modified rate equation model reflects the most important features of the density matrix calculations, and it also takes into account the vibrational relaxation, which is not considered in the three-level density matrix calculations. In such a way the pressure behavior of the far-infrared laser is explained by the power broadening of the gain in contrast to the usual explanation relating to the diffusion of the laser molecules
Keywords :
gas lasers; laser theory; laser transitions; molecular rotational-vibrational energy transfer; optical pumping; organic compounds; FIR gain. laser transitions; density matrix calculations; far infrared gain material; four-level rate equation model; laser molecules; maximum gain; methanol vapor; phenomenologically modified rate equation model; power broadening; pressure behavior; pumping power densities; vibrational relaxation; Equations; Finite impulse response filter; Kinetic theory; Laser excitation; Laser modes; Laser theory; Methanol; Power generation; Power lasers; Pump lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
