Title :
The optically pumped far-infrared laser: Rate equations and diagnostic experiments
Author :
Henningsen, J.O. ; Jensen, H.G.
Author_Institution :
H. C. Ørsted Institute, University of Copenhagen, Copenhagen, Denmark
fDate :
6/1/1975 12:00:00 AM
Abstract :
A four-level rate-equation model for an optically pumped far-infrared (FIR) laser is presented, and an expression is derived for the output power as a function of pump power and gas pressure. The theory is compared with measurements on the 570.5-μm line of CH3OH, pumped by a CO2laser. The width of the gain curve is measured and is shown to go below the Doppler width of the laser transition at low pressure. This indicates that the use of a monochromatic pump source leads to a velocity selective pumping process.
Keywords :
Equations; Finite impulse response filter; Gas lasers; Laser excitation; Laser modes; Laser theory; Laser transitions; Optical pumping; Power lasers; Pump lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.1975.1068616
