Title :
Absorption of HF laser lines in pure CO/sub 2/ and CO/sub 2/-He mixtures at high pressures
Author :
Mosquera, C.F. ; Sorichetti, P.A. ; Raffo, C.A.
Author_Institution :
Dept. of Phys., Buenos Aires Univ., Argentina
Abstract :
The authors experimentally determined the absorption of pure CO/sub 2/ and of mixtures of CO/sub 2/ with helium, at the emission wavelengths of a pulsed HF laser, in the same conditions at which lasing takes place in CO/sub 2/ by optical pumping of the relevant energy levels in the mixtures. Linear behavior of the absorption coefficient was found for mixtures containing 1 atm of CO/sub 2/ and increasing partial pressures of He up to 9 atm. In pure CO/sub 2/, however, the coefficient varied nonlinearly and tended to a saturation value at high pressures.<>
Keywords :
carbon compounds; gas lasers; helium; high-pressure phenomena and effects; infrared spectra of polyatomic inorganic molecules; light absorption; optical constants; optical pumping; optical saturable absorption; piezo-optical effects; 1 to 9 atm; 2.7 micron; CO/sub 2/-He mixture; HF laser lines; absorption coefficient; emission wavelengths; energy levels; high pressures; lasing; linear behaviour; optical pumping; pulsed HF laser; pure CO/sub 2/; saturation value; Absorption; Hafnium; Helium; Laser excitation; Laser theory; Laser tuning; Optical pulses; Optical pumping; Pulse measurements; Pump lasers;
Journal_Title :
Photonics Technology Letters, IEEE
