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

Volume

29

Issue

7

fYear

1993

fDate

7/1/1993 12:00:00 AM

Firstpage

2220

Lastpage

2224

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;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.237496

Filename

237496