Methanol Laser Line Assignments: Evidence of Four-Level Laser Systems

LaseRitz: Far-Infrared Laser Line Assignment and Prediction by the Ritz Combination Principle, with Application to Methanol and Hydrazine

“…(5) is the cascade laser, in which the population transfer from pump level ͉2͘ down to laser level ͉3͘ occurs radiatively (8). This scheme has tighter transition selection rules than the collisional scheme with a small number of dominant channels for radiative population transfer and has been seen for a number of FIRL systems (2,8).…”

Pulsed CH3OH Terahertz Laser Emission Pumped by a TEA CO2 Laser

“…More than 570 lines from 19 to 3030 μm have been observed for the parent l2 CH 3 16 OH species alone and about 2000 Lines in total for all of the isotopomers of methanol [2][3][4][5]. In the past few years, most research has been dedicated on the assignments of the observed THz laser lines from methanol and its isotopomers pumped by CW CO 2 lasers or chopped CO 2 lasers [6][7][8][9][10][11][12]. However, relatively less attention has been concentrated on energy of pulsed optically pumped CH 3 OH THz lasers, and only the relative energy of THz laser has been publicly reported [13,14].…”