Optically pumped pulse-periodic CF₄laser

Generation of 16 Micrometer IR Laser by theOptical Pumping of CF4 Gas Molecules

“…The lower lasing levels of this process are ν2 rotational levels with energies in the range of 435cm ֿ¹ [12].Thus a significant improvement in the maximum operating pressure and energy output of this laser achieved by cooling the gas, which reducing the population of the terminal levels of the lasing transitions (at 150K o the fraction of CF4 molecules is only 1.6% [1]) and also changes the initial thermal population of the lower level of the optically pumped transition [13].…”

Stochastic method for determining the coherence length of a TEA CO2 laser

“…The large homogeneous linewidth of TEA CO 2 lasers enhance the possibility of the abovementioned matches. Nevertheless, low pumping efficiencies of molecular gas lasers are often attained with TEA CO 2 lasers due to the linewidth mismatch between the pump laser emission line and the absorption lines in the laser gas [15][16][17]. Likewise, IRMPD is based on the sequential absorption of photons resonant with a rovibrational mode of the molecule.…”

“…These drawbacks can be overcome by narrowing the linewidth of the TEA CO 2 laser. Different techniques have been reported for this purpose [15][16][17][18][19][20].…”